ONE, bite, bottom

 

Description of the phenomenon

In the spraying process, the film will soften and dissolve the paint layer, wrinkles, swelling, blistering phenomenon.

 

The reason

 

1, paint is not complete (the original film crosslinking density is not enough or the original film poor solvent resistance);

 

2, the paint solvent diluent is too strong or too wet shotcrete construction;

 

3, the paint dry on the spraying a layer of paint or paint spraying layer two time interval is not reasonable;

 

Cross layer 4, original paint layer of polished thin even wear (such as polished metal paint repair the original light oil wear, between the original metal paint layer and the original reservoir edge is prone to bite phenomenon).

 

preventive measure

 

1, repair area with closed primer two-component, drying, grinding, and then select the manufacturer's recommended supporting paint spraying;

 

2, the manufacturer's recommended thinner construction construction, try not to be too wet;

 

3, pay attention to the construction of the time interval between the two layers of film;

 

4, repair as far as possible the use of closed primer two-component, drying, grinding, and then spraying the subsequent topcoat layer.

 

Repair method

 

For the film after drying, the defect area film polish, using closed primer two-component, drying, grinding, re spraying.

Two, white / fog

 

Description of the phenomenon

In high humidity environment spraying, paint film in drying process appears milky white or mist appearance, resulting in coating dry film gloss reduction even white phenomenon.

 

The reason

 

1, the construction of environmental humidity is too big and diluent in the process of evaporation heat away. Construction of workpiece surface temperature is reduced, resulting in condensation of moisture on the surface of the wet film produced;

 

2, spraying equipment containing water or moisture;

 

3, the coated temperature lower than room temperature in the construction, resulting in condensation of water vapor in the coated surfaces;

 

4, diluent, improper selection, speed too fast to use volatile diluent.

 

preventive measure

 

1, try to avoid construction in high humidity environment, such as the need to spray operation, should be heating drying the construction site or join the anti white water appropriate or use thinner slow dry;

 

2, clear water or water spraying device, for compressed air drying using drying equipment, reduce the amount of moisture in the air;

 

3, the coated workpiece appropriate temperature;

 

4, according to the manufacturer's recommended use thinner construction environment.

 

Repair method

 

1, minor white, completely dry hard film to be (it is best to heating and drying, 60 DEG C x 1 hour), and then polishing to restore the color of the paint film;

 

2, when the severity of white, the white area were polishing cleaning, using a two-component primer closed, after drying, grinding, re coating

Three, rust

 

Description of the phenomenon

 

Appear rusty spot even the whole phenomenon of rust film under. Red rust for white rust, rust aluminum rust.

 

The reason

 

1, the substrate before coating the surface is not good, rust, oxide layer, alkali liquid, salt, water is not clean;

 

2, the film has pinholes, coating defects such as leakage, the film is not completely scratch repair coating;

 

3, the film is thin, water or corrosive medium penetrating film to metal surface;

 

4, the painting environment is poor, the erosion of high temperature and high humidity or corrosive medium;

 

5, the film was severely corrosive medium pollution and reduce the corrosion resistance function.

 

preventive measure

 

1, surface treatment before coating thoroughly, will rust, alumina layer, saline alkali liquid, clean and dry;

 

2, keep the integrity of the coating, do not leak painting, especially the weld and corner to seal coating;

 

3, strictly abide by the coating process, coating thickness to meet the process requirements;

 

4, keep the coating environment clean;

 

5, the film to avoid prolonged and corrosive medium contact.

 

Repair method

 

If it has been produced corrosion, should be cleared of rust, to deal with a layer of rust proof coating, and then re painting

 

Four, color difference

 

Description of phenomena

 

Film after drying or in the future a period of time, its hue, lightness, chroma and standard board or body other parts of the color difference between the phenomenon.

 

Cause of production

 

1, the use of the material is different or not;

 

2, paint mixed uneven;

 

3, the standard in the film by the impact of pollution on the color or color tuning did not grasp;

 

4, new spray paint, poor weather resistance;

 

5, spraying method is improper.

 

preventive measure

 

1, the use of manufacturers recommended supporting materials;

 

2, to ensure that the paint is fully mixed in proportion;

 

3, the standard plate paint film contaminated to need polishing, restore the original paint color to the color. In the palette, refer to manufacturer recommended formula and color masterbatch to drawing selected masterbatch fine-tuning to ensure color accurate, in accordance with the correct method for toning and spray in contrast, until visual no color;

 

4, the use of high-quality products manufacturers recommend;

 

5, using the correct spraying method, such as spraying metallic basecoat note pressure and oil volume adjustment, three process pearl paint spray, pay attention to the color paint palette and pearl paint layer thickness of the construction and grasp.

 

 Five, fullness / shrinkage

 

Description of phenomena

 

After drying, the gloss is poor, thin even withered phenomenon.

 

Cause of production

 

1, paint allocation is improper, the use of inferior diluent or model is incorrect, the amount of curing agent is insufficient or too much;

 

2, bottom material or coating treatment is not smooth;

 

3, the deployment of paint when adding excess diluent;

 

4, spraying pressure is too large or too small paint;

 

5, the use of nitrocellulose putty (red ash) processing / scraper scrapes, chlamydia, due to nitrocellulose putty layer is too thick, the upper paint when construction, nitrocellulose putty layer swelling, topcoat layer to be dried, uneven thickness of the nitrocellulose putty layer will also occur irregular contraction;

 

6, bottom coating using mono nitro primer, and single component construction primer is too thick, upper paint, primer of one component layer swelling, topcoat layer to be dried, thick one component primer layer contraction ratio.

 

preventive measure

 

1, selection of high quality thinner and according to the manufacturer recommended paint mixing ratio construction;

 

2, on the bottom of the uneven and smooth coating, polishing process to achieve a smooth;

 

3, in strict accordance with the requirements of the construction process to add a moderate amount of diluent;

 

4, adjust the appropriate pressure and paint when spraying;

 

5, deep depression, scratch advice was filled with polyester putty, nitrocellulose putty (Hong Hui) only limited to fill pinholes, DIT and fine sandpaper marks;

 

6, to ensure the topcoat fullness, closed primer used in two-component advice.

 

Repair method

 

After the film is dry, the film will be removed in the defect area, the use of the two parts of the primer closed, drying, grinding, re spraying.

 Six, flooding

 

Description of phenomena

 

Paint in the spraying process or dry film, film of local color uneven, pitting, stripes or hue messy phenomenon.

 

Cause of production

 

1, the diluent used to dissolve too weak or too low construction viscosity, or before the construction of the paint is not fully mixed evenly;

 

2, paint coating is too thick, film drying process, volatile thinners caused by paint layer on occurrence of convection, blur and the formation of hexagonal pattern.

 

3, spraying equipment is not clean;

 

4, when the color of one component, two-component paint mix, or using different manufacturers of Masterbatch color, color masterbatch in production from different manufacturers due to the selection of resins, additives system can not be completely consistent so there must be different color masterbatch manufacturer between miscible problem.

 

preventive measure

 

1, select the appropriate diluent, adjust the viscosity to the construction process, before the construction of the paint to fully mix evenly;

 

2, film thickness should be in line with the requirements of the construction process, control the thickness of each film;

 

3, each painting should be thoroughly cleaned before spraying equipment;

 

4, modulation of color paint, with a series of manufacturers to use the same color modulation.

 

Repair method

 

Polish off the defect area, use the double - set of primer to seal, dry and polish, and then re spray the correct color.

 

Seven, the hiding power is poor

Description of phenomena

 

Because the paint is too thick or too thin, can not cover the lower layer of coating, can still see the color of the lower layer of the phenomenon.

 

Cause of production

 

1, spraying method is improper;

 

2, paint room lighting condition is poor, the work space is narrow, difficult to take into account some of the edge of the body when spraying;

 

3, paint mixed uneven;

 

4, the selection of poor quality or to add excess diluent;

 

5, due to the grinding, polishing, reducing the thickness of the paint layer.

 

preventive measure

 

1, using the correct spraying method to ensure that the film thickness is appropriate, uniform;

 

2, spray room lighting conditions are good, the space should be suitable, spraying to pay special attention to the difficult area, pay attention not to leak spray;

 

3, the paint will be fully mixed evenly;

 

4, the selection of manufacturers of quality thinner and according to the construction process requirements to join the appropriate amount of diluent;

 

5, do not over polishing the paint film, to pay special attention to the corner area.

 

Repair method

 

Polish off the defect area, use the double - set of primer to seal, dry and polish, then re spray the correct color.

Eight, foaming

 

Description of phenomena

 

Film in the drying process or the use of the process, the film generated bubble like uplift or hole, or in the film inside the phenomenon of bubbles generated.

 

Cause of production,

 

1, the surface of the coating has contaminants, such as water vapor, wax, etc.;

 

2, due to the improper construction method of the atomic ash, ash, or primer, the air is embedded into the paint film;

 

3, the film is connected to the side of the handle properly;

 

4, the use of inferior diluent or diluent, compressed air pressure, spray dry or blow dry film surface;

 

5, there is no proper treatment and closed bottom material, especially the glass fiber reinforced plastic, wood, medium fiber board and other loose base material;

 

6, spraying, each paint interval time is insufficient or one-time spraying too thick;

 

7, before baking, the flow of time or baking time is insufficient to heat up too fast.

 

preventive measure

 

1, before spraying, thoroughly clean the coating surface;

 

2, strictly according to the construction process requires the correct use of atomic ash, ash or primer;

 

3, making the feather edge, the feather edge is not less than 3 cm;

 

4, the use of high-quality diluent and according to the construction requirements to add thinner, and in accordance with the correct process;

 

5, loose density of the substrate using a two-component epoxy primer or two-component sealing primer paint bottom material closed, and ensure the construction paint with a smooth bottom coating;

 

6, according to the requirements of the construction process, each paint a sufficient interval of time and the appropriate thickness of the film;

 

7, before baking, to ensure that the film has enough time to flow flat and in baking to prevent the temperature rise too fast.

 

Repair method

 

After the film is dry, the film will be removed in the defect area, the use of the two parts of the primer closed, drying, grinding, re spraying

Nine, flow hanging

 

Description of phenomena

 

The phenomenon of thickening of the upper and lower edges when the paint is sprayed or when the film is dry. Generally occurs in the vertical plane.

 

Cause of production

 

1, the construction is improper, the spray gun and the coating material surface distance is too close;

 

2, the gun speed is too slow, a spray too thick, etc.;

 

3, paint the construction of low viscosity;

 

4, construction environment temperature is low, paint drying time is slow;

 

5, the use of wet wet process spraying, the time interval is too short;

 

6, spray pressure is too low, the gun caliber is too large;

 

7, before baking, the flow of time or baking time is insufficient to heat up too fast.

 

preventive measure

 

1, using the correct spraying method, the spray gun and the coating surface distance is appropriate (normal distance is 20cm);

 

2, the correct way to take the gun, and attention to a spray should not be too thick;

 

3, dilute the paint according to the construction process requirements, the deployment of appropriate construction viscosity;

 

4, in the lower temperature of the winter construction, as far as possible to improve the temperature of spraying room, to ensure that the temperature above 10 degrees celsius;

 

5, wet touch wet process construction, ensure that there is enough time;

 

6, according to the requirements of the construction process to select the appropriate gun pressure and gun caliber;

 

7, before baking, to ensure that the film has enough time to flow flat and in baking to prevent the temperature rise too fast.

 

Repair method

 

1, sagging occurred at 2K plain topcoat layer and layer of varnish, paint fully hardened after P1200 No. or P1500 No. sandpaper grinding and polishing. To re spray when the situation is serious.

 

2, refinish laminar hanging, until the paint is dry, defect area of the film burnish drops, using a two-component coating primer closed, drying, after grinding, re coating.

Ten, polishing marks

 

Description of phenomena

 

The film surface can see subtle stripe or scratches phenomenon. Sometimes the defective parts will be exposed.

 

Cause of production

 

1, the film did not reach a certain hardness polishing treatment;

 

2, the pressure of the polishing machine is too large or too fast speed;

 

3, the use of grinding paste is too thick or alkaline polishing cloth / ball is too dirty, too rough.

 

preventive measure

 

1, to wait for the film to be polished after polishing;

 

2, the use of polishing machine when the pressure should not be too large, the speed should be appropriate;

 

3, the use of fine grinding paste, the right type, buffing wheel / ball soft, clean.

 

Repair method

 

After the film is fully dry and hard polishing. If the defect is serious, after the film is dry, the defect area will be polished off the paint film, the use of two parts in the primer closed, drying, grinding, re spraying.

Eleven, the rash

 

Description of phenomena

 

The phenomenon of needle tip size or film defects in the film.

 

Cause of production

 

1, surface cleaning treatment is improper, there is wax or oil;

 

2, the use of not suitable diluents, especially the use of fast drying diluent sprayed too dry or air pressure too big to cause the retention of moisture from the air in the paint film;

 

3, the film is too thick and each time interval is not enough, or a coating is too thick to cause the solvent cannot sufficiently volatile and the formation of pits vesicles.

 

4, compressed air contains oil, water or other contaminants;

 

5, wet grinding is not completely dry spray or paint primer;

 

6, the use of non matching products so that there is not compatible with the paint.

 

preventive measure

 

1, completely prepared to wax, decontamination and cleaning work in the spray primer or paint, the coated surfaces must be completely dry;

 

2, according to the construction environment and manufacturers recommend choosing appropriate diluent;

 

3, when spraying, pay attention to each interval should be sufficient;

 

4, every day the air compressor oil, water and dirt clean;

 

5, the coating surface wet grinding must be completely dry;

 

6, the use of manufacturers supporting products.

 

Repair method

 

1, grinding to prickly heat occurred and then re construction layer;

 

2, if the rash is a serious need to completely polished, leveling, then spray a layer of two-component primer isolation, drying, grinding, newly painted.

Twelve, loss of light

 

Description of phenomena

 

Loss of light occurs mainly in the plain topcoat layer or layers of varnish, dry film of high gloss, dry gloss reduction or after the gloss gradually disappear.

 

Cause of production

 

1, the use of inferior dilution, resulting in poor film flow, low gloss;

 

2, the lower surface quality of the coating, the coating structure is not dense enough, will absorb the coating film and so on;

 

3, improper construction, use too dry curing agent and diluent, resulting in no film leveling time enough;

 

4, film thickness is not enough, weathering resistance;

 

5, the humidity is too large or too low in the environment of construction, and natural drying after spraying, in the process of two parts of the paint in the curing agent will react with the air in the water vapor, resulting in a decline in the film gloss.

 

preventive measure

 

1, the use of manufacturers recommended matching diluent;

 

2 surface treatment, coating must be careful and thorough treatment, should pay attention to sealing putty;

 

3, according to the construction environment of the selection of manufacturers recommended product mix construction;

 

4, to ensure that the thickness of the film to reach the process requirements;

 

5, in the low temperature and high humidity environment construction, it is recommended to bake.

 

Repair method

 

1, under normal circumstances, usually for polishing treatment, you can restore the luster;

 

2, when the situation is serious, the paint film polishing treatment, and then re spraying.

Thirteen, floating color

 

Description of the phenomenon

 

In the presence of mixed pigment coatings due to the pigment particles of the size, shape, density, dispersion and cohesion of different, in the dry film, pigment deposition rate is not the same, make the film surface and lower pigment distribution uneven, resulting in each section of the color difference between the phenomenon.

 

The reason

 

1, choose different brands of paint for Color Masterbatch, different brands of immiscible or poor miscibility;

 

2, preparation of color paint pigment dispersion is not up to the requirements, or method of dispersion, the selection of equipment;

 

3, the construction of low viscosity.

 

preventive measure

 

With a series of 1 Color Masterbatch, in principle, use the same brand of different brand series, try not to mix color;

 

2, improved dispersion method, fully mixed paint;

 

3, according to the requirements of the construction process is adjusted to the appropriate viscosity.

 

Repair method

 

Such as floating color has occurred, the topcoat in spraying a qualified coat, which can eliminate the phenomenon of floating color. Such as floating phenomenon is serious, for the film after drying, the defect area film polish, using closed primer two-component, drying, grinding, re spraying.

Fourteen, pinhole

 

Description of the phenomenon

 

The film in the drying process, the volatilization rate of diluent too fast, make the paint not leveling of leveling, and produce pinhole holes or pores like leather like phenomenon.

 

The reason

 

1, after coating leveling time insufficient, excessive heat during baking;

 

2, the coating is too thick or too high temperature coated surface;

 

3, the improper selection of thinner film surface, resulting in excessive drying, the film is not easy volatile solvent;

 

4, the coated surface roughness, putty layer surface is not smooth, not closed directly spray paint;

 

5, compressed air or water containing paint, thinner;

 

6, spray pressure is too large or too thick a spray.

 

preventive measure

 

1, according to the construction process requirements, to ensure that the film has enough time to bake before baking, baking time temperature not too fast;

 

2, paint film thickness should be within the scope of the process, the coating temperature should be consistent with room temperature;

 

3, according to the construction environment and manufacturers recommended selection diluent;

 

4, the coated putty layer should be smooth, should pay attention to the sealing treatment;

 

5, before the construction should pay attention to clear the water in the cleaning spraying equipment, paint cans should pay attention to the sealing water or water vapor into the water;

 

6, pay attention to the appropriate spraying pressure, as far as possible not to paint too thick.

 

Repair method

 

Polish the defect area to the pinhole layer, spray a layer of two component seal primer, drying, grinding, re spraying.

 Fifteen, paint spray / dry spray

 

Description of phenomena

 

Spray paint mist splash or fall on the surface of the coating or paint film, so that the surface of the film is a granular rough structure.

 

Cause of production

 

1, spray paint the construction viscosity is too high;

 

2, the use of the wrong type of diluent diluent, too fast;

 

3, spray method is improper, the pressure of compressed air is too high, or spray gun from the workpiece surface is too far;

 

4, when spraying a draught or air flow too fast.

 

preventive measure

 

1, paint the construction viscosity should be within the scope of the construction process;

 

2, according to the construction environment and manufacturers recommended selection diluent;

 

3, using the correct spraying method, keep the spray gun clean, in ensuring the full atomization of the paint on the premise, as far as possible to reduce the pressure of the compressed air, the spray gun and the workpiece surface to maintain the appropriate distance;

 

4, to be in the spray paint room, indoor air flow to maintain appropriate speed.

 

Repair method

 

1, the defect area is polished, and then polished. If the film surface is too rough with the aforementioned method can not be repaired, it should be ground surface paint surface, and then re painting.

 

2, for the silver paint, the paint must be removed again after spraying.

 Sixteen, cracking

 

Description of phenomena

 

The phenomenon of the crack or crack in the paint film. Usually occurs near the edge of the gap or plate which is filled on the substrate. Cracks usually appear in the triangular shape, the depth of the crack, the more serious cracks can be directly to the basement. The local repair, in just the feather edge spray paint, there may be slight crack.

 

Cause of production

 

1, before spraying the paint mixing, adding amount of thinner is insufficient or wrong type;

 

2, the surface of the substrate processing method is improper, sandpaper too coarse, the cleaning is not thorough or improper to fill the gap;

 

3, compressed air pipeline with oil and water pollution;

 

4, the film is too thick, or the paint between the leveling time is not enough, or the use of compressed air blow dry film surface resulting in a paint film solvent, is not timely volatile;

 

5, spray, the temperature of the substrate is too high or too low;

 

6, in the not fully cured film or thermoplastic acrylic paint on the thermosetting paint.

 

preventive measure

 

1, before spraying paint must be mixed evenly, and in accordance with the provisions of the proportion of the use of thinner and model;

 

2, careful preparation of the substrate surface, using the correct specifications of sandpaper, correctly fill the gap on the substrate;

 

3, the correct maintenance of compressed air equipment, pay attention to clean up before the construction of oil and water;

 

4, using the correct spraying method, to ensure that the flow of time between the paint film is enough;

 

5, to ensure that the surface temperature of the substrate is within the recommended range, and then start spraying;

 

6, to be fully dry after coating, for thermoplastic coating to be closed.

 

Repair method

 

1, when the crack is slight, affecting only the topcoat, available sandpaper grinding crack to crack disappeared, and then use two-component primer closed, and re spray paint;

 

2, if the crack penetrates in the end when the paint, the defect area of the film all wear off or remove and defect on substrate to repair, and then re spraying double group into epoxy primer, two-component primer and topcoat.

Seventeen, particle

 

Description of the phenomenon

 

Paint spraying, showing local surface film or the entire surface of the irregular size protruding particles or fibers, filamentous phenomenon.

 

The reason

 

1, the coated surfaces are not thoroughly cleaning dust;

 

2, the paint may be contaminated;

 

3, spraying dust pollution environment;

 

4, construction of the clothes brought into the dust, fiber;

 

5, poor or diluent solvent incompatible substances in paint.

 

preventive measure

 

1, the bottom coating cleaned thoroughly;

 

2, to ensure that all materials clean, material container should be sealed using paint before filtration;

 

3, to ensure the paint room clean clean, when necessary, the spray chamber and around the ground wet, to ensure the normal work of the air filtration system;

 

4, the construction personnel in the best spraying wear anti-static painting clothes;

 

5, the manufacturer's recommended products.

 

Repair method

 

The film is completely solidified, the fine particles are minor, available sandpaper polishing, then. If the impurity particles embedded deep, will be removed and then re spray paint

Description of the phenomenon

 

In the background of spraying metal paint, paint spraying or sagging due to uneven thickness, the thinner and paint is not complete. The appearance of the coating is not uniform, the silver powder arranged disorderly or film surface phenomenon of rough like sandpaper.

 

The reason

 

1, spraying viscosity is too low or too high;

 

2, the film thickness is not uniform;

 

3, finish and varnish by interval wet construction process is too short;

 

4, the construction of the air pressure is too high or too low, or a large quantity of paint, the atomization effect is poor;

 

5, the ambient temperature is low.

 

preventive measure

 

1, adjust the construction in construction process within the range of viscosity;

 

2, to ensure that each film thickness;

 

3, in strict accordance with the construction process of spraying, to ensure the time interval between each coat;

 

4, adjust the spraying pressure within the scope of the provisions of the process;

 

5, to ensure environmental temperature to meet the requirements of process parameters.

 

Repair method

 

If the above defects have occurred, the defective parts grinding to the next layer, using closed primer two-component, drying, grinding, re spraying.

 

Eighteen, metal flash uneven / clouds

 

Description of the phenomenon

 

In the background of spraying metal paint, paint spraying or sagging due to uneven thickness, the thinner and paint is not complete. The appearance of the coating is not uniform, the silver powder arranged disorderly or film surface phenomenon of rough like sandpaper.

 

The reason

 

1, spraying viscosity is too low or too high;

 

2, the film thickness is not uniform;

 

3, finish and varnish by interval wet construction process is too short;

 

4, the construction of the air pressure is too high or too low, or a large quantity of paint, the atomization effect is poor;

 

5, the ambient temperature is low.

 

preventive measure

 

1, adjust the construction in construction process within the range of viscosity;

 

2, to ensure that the film thickness uniformity;

 

3, in strict accordance with the construction process for spraying, to ensure that the interval between each paint;

 

4, adjust the spray pressure within the scope of the process;

 

5, to ensure that the environment temperature to meet the requirements of process parameters.

 

Repair method

 

If the above defects have occurred, then the defect parts will be polished to the next layer, the use of the two components in the primer closed, drying, grinding, re spraying.

 

Nineteen, orange

 

Description of the phenomenon

 

The film surface is rugged, like orange, grapefruit skin surface phenomenon.

 

The reason

 

1, the construction of high viscosity, leveling the film flow;

 

2, does not use the thinner but with a poor diluent volatilizing speed too fast;

 

3, spraying method is undeserved, spraying distance, compressed air pressure, nozzle or improper adjustment;

 

4, after spraying flow out of time, early warming;

 

5, in the summer construction, the temperature too high, at more than 35 DEG C.

 

preventive measure

 

1, according to the construction process to adjust the viscosity, improve film leveling;

 

2, used in the high temperature environment thinner slow dry or super slow dry thinners;

 

3, using the correct method of spraying;

 

4, baking paint film should be about 5-10 minutes of flash drying time, to ensure that the film has sufficient flow flat time;

 

5, to improve the coating environment, as far as possible in the recommended temperature range.

 

Repair method

 

The film will peel after curing, polishing and polishing part. To re spray when the situation is serious.

Twenty, fall off

 

Description of phenomena

 

Due to the film on the end of the loss of adhesion, as well as the formation of flake like or large shedding phenomenon.

 

Cause of production

 

1, the end of the material is not clean, oil, water vapor or other chemicals residues;

 

2, paint matching unreasonable;

 

3, treatment method is improper, the adhesion between coating layer is poor;

 

4, the bottom paint dry on the spray paint or varnish;

 

5, the primer layer over baking or coating is too thick;

 

6, the diluent is too poor.

 

preventive measure

 

1, the coating should be thoroughly cleaned before the end, and in a timely manner to paint;

 

2, the matching between the coating should be reasonable;

 

3, appropriate polishing treatment, increase the adhesion between layers;

 

4, must be the bottom paint dry and then spray paint on a layer of paint;

 

5, in strict accordance with the process requirements for coating processing;

 

6, selection of manufacturers matching diluent.

 

Repair method

 

Has been off the film, should be completely removed after the re painting

Twenty-one, sand mark

 

Description of phenomena

 

In the process of drying, due to the shrinkage of the paint film, the surface of the paint surface paint the surface of the grinding or other processing traces of the phenomenon.

 

Cause of production

 

At the end of 1, the surface of the coating processing method is improper, sandpaper is too thick, grinding uneven, fill the lack of;

 

2, bottom coating not fully dry sprayed paint layer;

 

3, the film's thickness is not enough, or the drying speed is too slow.

 

preventive measure

 

1, the use of appropriate fineness of sandpaper, fill in the deep surface sanding scratch by filling with grey eyes, the surface should be smooth, if necessary with two-component coating primer closed treatment;

 

After the 2, to end the coating fully hardened, and then spray paint;

 

3, film thickness should be appropriate, dry conditions to be correct.

 

Repair method

 

1, if the paint marks slight plain sandpaper, regional defects could be removed, and then polishing;

 

2, if the sanding scratch more serious or sandpaper marks in the metallic basecoat layer, polishing film until get rid of the original sandpaper marks, spray painted a layer of closed, then re spraying.

Twenty-two, dirt / industrial precipitation

 

Description of phenomena

 

The surface of the paint is a stain, spot or stain and stain. The paint surface appear greasy or sticky feeling, mixed with particles, or feels a sense of the phenomenon of sand.

 

Cause of production

 

1, SAP or resin, wet leaves, berries or bird in the film;

 

2, cement and other chemicals with the activity of dust, metal particles are embedded in the paint surface and oxidation;

 

3, spraying environment pollution source.

 

preventive measure

 

1, should pay attention to the parking environment, while attention not to let any debris in the film surface for a long time;

 

2, to cover the car when the car cover, to avoid any possible source of pollution. Take particular care not to expose new paint films that are not completely dry in any environment that can lead to dirty particles;

 

3, if the spray room, to ensure the normal work of the air filtration system. Do not let any industrial gas into the paint room.

 

Repair method

 

For the slight stains in the film surface, first with a soft solvent detergent washing film surface, and then use 10% of the oxalic acid wash to remove the iron impurity particles, and finally washed with water, grinding and polishing, restore luster to the film surface. If you use the above method to remove stains or discoloration, you should remove the paint layer, and then re painting.

Twenty-three, scratch / Stone strike marks

 

Description of phenomena

 

Film by the impact of stone, iron, and twigs scratched or rock rupture phenomenon, damage depth and damage area and cause different and different.

 

Cause of production

 

Belongs to the impact damage, generally by the road bounce the stone to hit on the paint film to be caused either by the sharp and hard object to scratch.

 

preventive measure

 

Due to the road up to the stone caused by the paint film damage is unavoidable, in the garage, spraying room, transport process should pay attention to protect the film from damage.

 

Repair method

 

Mill off the paint film of defect region, at the edge of the interface manufacture pinnate, large depression filled with putty, microscopic depression filled by filling with grey eyes, spraying a layer of closed paint, polished smooth re spray paint

Twenty-four, shrinkage / fisheye

 

Description of phenomena

 

A large number of surface of the paint film from the pinhole to the diameter of 1 cm or so the phenomenon of crater shaped hole. Large size shrinkage usually occur alone, and small shrinkage will appear.

 

Cause of production

 

1, coating environment or the existence of organic compounds containing silicon on the substrate, other sources of pollution, such as grease, soap, detergent, wax or other oil;

 

2, compressed air may be mixed with water or oil;

 

3, the construction environment humidity is big, the coating material surface is easy to be stained with water vapor, easy to cause shrinkage.

 

preventive measure

 

1, the base material or the bottom of the coating for thorough polishing and cleaning;

 

2, regularly check the use of compressed air oil water separator;

 

3, to avoid the construction of large humidity environment.

 

Repair method

 

1, if the small hole in the construction process, but the manufacturers recommend the use of anti water ball.

 

2, such as the above method does not work, then the film is dry, the defect area of the paint film is polished off, and thoroughly cleaned, and then re spraying.

Twenty-five, the infiltration of color

 

Description of phenomena

 

Paint the primer paint softening or dissolved, the bottom paint color seeped into the paint layer, so that the film surface discoloration of the phenomenon. Serious when the paint film color completely changed, in red or brown red surface spraying is prone to this phenomenon.

 

Cause of production

 

1, bottom coating of organic pigment is dissolved paint solvent, dye penetration into the layer of paint, or at the bottom of the wet paint spraying coating.

 

2, the old paint layer is not necessary or closed, dark bottom paint, paint for light, easy to cause bleeding;

 

3, paint layer containing dissolved strong solvent;

 

4, putty, filling the hole and ash was not properly closed treatment, spray paint, easy to cause bleeding.

 

preventive measure

 

1, must be the bottom layer of paint dry and then a layer of paint on the construction;

 

2, the old paint or coating is easy to cause bleeding, the best spraying 2K coating primer, and then spray paint;

 

3, the use of manufacturers recommended matching diluent;

 

4, putty, filling the hole and ash shall be coated with a layer of 2K coated sealing primer, polishing, spray paint.

 

Repair method

 

Polished to paint layer, spraying 2K coating primer for the original film sealing, polishing, spray paint again.

Twenty-six, water spot / water stains

 

Description of phenomena

 

A film on the appearance of different shapes of the phenomenon of the mark. In general, the color of the mark is slightly lighter than the color of the surrounding paint film.

 

Cause of production

 

Film not fully hardened before by rain or splash droplets of water, paint film on the surface of the part of the curing agent and water react;

 

2, paint in the curing agent is not added in proportion;

 

3, the paint film is not completely dry for washing or contact with water.

 

preventive measure

 

1, in the film is not fully hardened, to prevent water droplets falling on the above;

 

2, in strict accordance with the manufacturers recommend the proportion of the paint to the allocation of the construction;

 

3, paint film completely dry after the next process.

 

Repair method

 

Remove the water spot of the defect area, gently polish and polish, repeat the above steps if necessary. In serious cases, re spray paint.

Twenty-seven, acid solution erosion

 

Description of phenomena

 

The film surface appears irregular patches of rough, fade, local spalling or rupture of the regional, sometimes by inhibition zone will crack or cracks, paint surface can see traces of substances that have the phenomenon of erosion.

 

Cause of production

 

Paint film received chemical corrosion. This is usually the case:

 

1, brake oil, peroxide (putty driers), battery solution corrosive materials such as in the film;

 

2, acid rain falls on the paint film;

 

3, the use of a new and not fully cured paint film.

 

preventive measure

 

1, often keep the film surface cleaning and hygiene, and to work on the vehicle to protect the paint film;

 

2, the vehicle in the outdoor storage, to protect the paint film.

 

3, to ensure that the film is fully cured, the new paint film to avoid the use of detergent.

 

Repair method

 

For minor damage of the film, can adopt method of sandpaper grinding and polishing, gas repair. For a film that has been severely eroded, it shall be completely removed from the corroded paint layer, and make sure that the traces of the eroded material are completely removed, and then re sprayed onto the paint

 Twenty-eight, poor adhesion

 

Description of phenomena

 

Due to poor adhesion of the coating, the film can be peeled off by the external force.

 

Cause of production

 

1, when the coating or substrate surface is not polished, or coated material surface contamination, surface treatment;

 

2 and the coating is not complete, or primer and substrate is not complete;

 

3 wet spray paint, primer;

 

4, diluent dissolution force difference;

 

5, spraying, the surface of the substrate temperature is too high or too low, the temperature is too high, the paint film can not fully wetting the substrate or the bottom coating, the temperature is too low to cause the raw material or the original bottom coating surface easy to condense moisture.

 

preventive measure

 

1, before painting to be properly polished to clean the surface of the coated material, do a good job before treatment;

 

2, select manufacturers recommended matching paint;

 

3, to be dry after spray paint primer;

 

4, be sure to use a complete set of diluent;

 

5, the construction must ensure that the surface temperature of the coating material in the scope of the construction process.

 

Repair method

 

To get rid of the poor adhesion of the coating, re - on the base or the bottom of the coating to thoroughly clean the cleaning process, and then re spraying.

Twenty-nine, dry bad

 

Description of phenomena

 

The film drying time is too long or not fully cured film appears weak, low hardness, poor adhesion phenomenon.

 

Cause of production

 

1 wet spray paint, primer;

 

2, the film is too thick, the drying time will be extended accordingly;

 

3, spraying or dry environmental conditions, the temperature is too low, the humidity is too high, or the air flow is poor;

 

4, the flow of paint between the paint time is insufficient;

 

5, diluent model is not too bad or too bad.

 

preventive measure

 

1, dry and then spray paint primer;

 

2, film thickness should be controlled within the range of technology;

 

3, to make the spraying environment temperature appropriate, ventilation, avoid the high humidity environment in the construction;

 

4, each road coating to ensure adequate flow flat time;

 

5, according to the proportion of the use of recommended diluent.

 

Repair method

 

Transfer the vehicle or the workpiece to the appropriate temperature, ventilated place, a little heated to improve the drying speed of the film, but should pay attention to prevent the film wrinkle. If the paint film is not up to the requirements of the index, it will need to re - polishing after spraying.