LED Inspection Light with Rubber Paint Defects Analysis

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LED Inspection Light with Rubber Paint Defects Analysis

LED Inspection Light Supplier

— A Quality Controlling Specification from a China LED Inspection Supplier

 LED Inspection Light from China Supplier

LED Inspection Light Rubber Coat Defect Name 1-

Sagging

defect 1 rubber painting portable led inspection lights

Defect performance:
The paint on the vertical coating surface flows down to form a partially thick and uneven surface.

Defect hazard:
Affects the appearance, and cracks occur when the paint is too thick.

Major Reason:
1. Uneven coating, partial or overall single coating too thick;
2. Excessive use of thinner or use of unsuitable thinner;
3. When painting, the temperature of the surface to be coated is too high;
4. Painting on an old, smooth surface with poor adhesion.

Prevention / Solution:
1. Apply according to the correct film thickness and control the wet film thickness with a wet film meter.
2. Dilute according to the technical specifications, and must use the matching thinner.
3. Apply at the temperature of the surface to be coated;
4. For smooth surfaces, it is necessary to carry out the necessary surface treatment before painting to form a certain roughness; 5. For sagging, when the paint film is not dry, it can be brushed flat. If it is dry, use sandpaper to polish it.

LED Inspection Light Rubber Coat Defect Name 2-

Flying paint / dry spray/sand surface Overspray / Dry Spray

defect 2 rubber painting portable led work lights

Defect performance:
The surface of the paint film forms a rough sand-like surface.

Defect hazard:
Prevents the coating of the underlying paint, and at the same time, there will be tiny rust spots on the surface.

Major Reason:

  1. Quick-drying paint When coating, the solvent volatilizes too quickly, which will lead to flying paint.
    2. Poor construction, the distance between the nozzle and the coated surface is too far;
    3. When painting, the nozzle of the spray gun is not perpendicular to the surface to be coated;
    4. The atmospheric temperature is too high and the air flow rate is too high (windy weather.

Prevention / Solution:
1. Use the recommended matching thinner, especially on high temperature and windy days.
2. Maintain the correct painting position (coating distance 30-50 cm, the spray gun, and the coated surface must be vertical);
3. Avoid high temperature and windy days for painting construction;
4. After the paint film is dry, and the surface paint with sandpaper and then apply it.

 

LED Inspection Light Rubber Coat Defect Name 3 –

Orange Peel

defect 3 rubber painting portable led work lights
Defect performance:
The paint film is dimple-like, similar to the orange skin. A common phenomenon in the construction of high solids paints.

Defect hazard:
Surface defects affecting the appearance of the paint film of portable work lights led.

Major Reason:
1. Improper construction, the spray gun is too close to the painted surface; the output pressure during painting is too large. 2. The diameter of the spray gun is too large or becomes large due to wear;
3. When painting, the temperature of the surface to be coated is too high, and the paint has been dried before it has been leveled. 4. When the primer is not dried, the coating is applied, resulting in shrinkage of the two layers of paint film to form orange peel.

Prevention / Solution:
1. Maintain the correct painting posture (painting distance and painting pressure);
2. Use a spray gun of the appropriate diameter and replace the worn nozzle in time;
3. The coating should be carried out under the conditions of the temperature of the surface to be coated;
4. Pay attention to the coating interval, confirm that the primer is dry and will not affect the topcoat; 5. When the paint film of the LED portable lamp is still wet, use a brush; if it is already dry, it needs to be sanded and leveled. Make up the paint.

 

LED Inspection Light Rubber Painting Defect Name 4 –

Wrinkling

 defect 3 rubber painting portable led work lights

Defect performance:
Wrinkling is the wrinkle on the surface of the paint film.

Defect hazard:
The surface of the paint film has dried, but the inner layer of the LED hand lamp paint is soft.

The surface of the paint film is dry, but the inner layer of the paint cannot be dried, which may cause the curing of the paint film to fail, resulting in peeling.

Major Reason:
1. Uneven coating, partial or overall single coating too thick;
2. Coating in the sun, after painting, the surface temperature of the paint film is high, the drying is fast, and the film formation is early, which hinders the evaporation of the solvent in the inner layer of the paint film.

Prevention / Solution:
1. According to the thickness of the paint film, use a wet film meter to control the thickness of the wet film;
2. It is forbidden to paint under direct sunlight;
3. For the wrinkled surface, it needs to be repaired and then repainted.

 

LED Inspection Light with Rubber Paint Defect Name 5 – 

Bleeding

defect 5 Bledding rubber painting portable led inspection lamp
Defect performance:
Epoxy asphalt or asphalt material penetrates into the topcoat to cause bleeding.

Defect hazard:
It will pollute the color of portable led work lights.

Major Reason:
1. The bleed phenomenon of the topcoat is caused by the floating of the asphalt material in the primer.
2. The coating system uses a tar-containing substance as a primer and the top coat must use a light color. This defect is difficult to avoid.

Prevention / Solution:
1. When choosing a coating system, you must consider the combination of primer and topcoat;
2. You can use high-grade aluminum powder paint as intermediate paint to prevent or at least reduce this phenomenon.

 

LED Inspection Light Rubber Paintings Defect Name 6 –

Lifting

defect 6 lifting rubber painting portable led inspection lamp

Defect performance:
On old and new paint films, usually due to the action of solvents, causing bubbles or wrinkles.

Defect hazard:
Causes bubbles or creases on the paint film.

Major Reason:
1. Apply a strong solvent to the old paint film.
2. Most of the bite is on the oxidatively dried coating. Little but also possible on the same type of paint film. The most common cause of biting the bottom is in warranty, such as when alkyd is used in combination with other strong solvent coatings, the strong solvent contained in the topcoat will cause the alkyd solvent to swell and cause a bite.

Prevention / Solution:
1. Before painting, first select the sampling plate to test, to confirm that there will be no bottoming phenomenon;
2. Before using high-solid paint, it can also reduce the occurrence of the bottoming phenomenon.

 

Rubberized LED Inspection Lamp Defect Name 7 –

Checking

defect 7 checking rubber painting portable led work lights

Defect performance:
This lacquer disease is often a tiny crack that creates cracks on the surface of a relatively regular membrane.

Defect hazard:
Cracking is usually a surface phenomenon because these cracks rarely penetrate the entire paint film.
The tensile force on the paint film can cause the portable led work lights to paint surface to become brittle, causing the paint to peel off.

Major Reason:
Usually, this is a problem with the curing of a paint film.

Prevention / Solution:
When fine lines occur, the solution is usually sanding and repainting the new topcoat.

 

Rubberized LED Inspection Light Defect Name 8 –

Mud Cracking

defect 8 Mud cracking rubber painting portable led work lights

Defect performance:
The paint film showed a deep crack until the bottom surface.
Defect hazard:
In the case of large cracks, the paint film will peel off.

Major Reason:
1. Highly filled fillers are used on overly thick paint films such as inorganic zinc-rich primers.
2. Painting, the atmospheric temperature during the curing process drops too fast;
3. The solvent evaporates too fast;
4. The primer is soft and the topcoat is hard.

Prevention / Solution:
1. When painting high-fill paint, you must master the film thickness;
2. When the temperature difference is large, it is necessary to take the necessary precautions;
3. Use a suitable diluent;
4. Choose a suitable coating system;
5. The area with large cracks will be re-blasted and painted.

 

Rubberized LED Inspection Light Defect Name 9 –

Fish Eyes

defect 9 Fish Eyes rubber painting portable led work lights

Defect performance:
There is a small portion of the center of the portable LED work lights lamp spray surface defect, with contaminants and some paint in the area. The surrounding area was not wetted by paint. So here you will find the color of the primer or surface. The surface area is not 100% wetted by the paint.

Defect hazard:
The surface of the defect is not covered by paint and does not protect the surface.

Major Reason:
There are residual oil droplets and other contaminants on the surface.

Prevention / Solution:
1. General oil droplets and other contaminants come from compressed air during sandblasting. Before the sandblasting, it is necessary to check the compressed air to determine whether the oil-water separator of the air compressor needs to be replaced;
2. The compressed air is blown through the white cloth for about 1 minute. Oil droplets or moisture will be wetted by the rag. If oil droplets appear, the filter and oil/water separator must be inspected, which may reduce the paint’s ability to resist fish eyes.
3. If the fish eyelids are found after the paint is cured, it is necessary to re-blast the area (area hour grinding) and then touch up the paint.

 

Rubberized LED Inspection Lamp Defect Name 10 –

Pinhole

defect 10 Pinhole rubber painting portable led inspection lamp

Defect performance:
Small shrinkage holes formed on the surface of the paint film.

Defect hazard:
Through the lead work lights, the paint film reaches the pinhole of the steel plate, which will form pin rust and lead to rust under the film.

Major Reason:
1. The thinner evaporates too quickly, and the paint does not have time to fill the pinhole;
2. During construction, the coating distance is too close; the coating pressure is too large; the film thickness is too thick.
3. When the coating, the temperature of the surface to be coated is too high;
4. Ground defects, such as pinholes; too rough surfaces (inorganic zinc-rich primer).

Solution:
1. Adjust the thinner.
2. Maintain the correct construction posture, pressure, and film thickness.
3. Do not paint on a high-temperature surface.
4. When painting on inorganic zinc-rich primer, first spray more with a thinner mist.
5. For pinholes, it must be polished to remove the paint.

 

ABS LED Inspection Lamp with Rubber Paint Defect Name 11 –

Blooming, Blushing

defect 11 Blushing Blooming rubber painting Rechargeable led inspection lamp

Defect performance:
The loss of gloss of the paint film and the batt of the paint color can be found after the paint film is formed, and it needs to be distinguished from the pulverization of the paint.

Defect hazard:
Affect the appearance of the paint film; if the undercoat is applied to the paint film, the adhesion between the paint films may be poor, and special attention is required.

Major Reason:
1. During the coating and curing process, the surface temperature is low and the humidity is high;
2. The solvent in the paint evaporates too quickly, causing the surface temperature to decrease, causing moisture in the air to condense on the surface, causing defects.

Solution:
1. Pay attention to the painting time. This phenomenon often occurs in outdoor painting at night.
2. Must be controlled for the construction environment, temperature and humidity must meet the construction conditions of the paint.
3. Select the appropriate diluent.
4. The surface of the defect led work lights needs to be sanded with sandpaper and then touched.

 

ABS LED Inspection Lamp with Rubber Paint Defect Name 12 –

Cratering, Popping

China led inspection lamp defective rubber paint 12

Defect performance:
In the presence of an explosion, there will be an exposed bottom and a blast hole. Sometimes this defect will have a small lens like a bubble at the top.

Defect hazard:
Film defects, affecting the integrity of the film, leading to early damage to the film of portable led work lights lamp.

Major Reason:
1. When painting, there are a lot of bubbles in the paint, which may be generated during mixing.
2. The surface temperature is too high and the flow of air is large. After the paint is applied, the paint film on the surface is first dried, and the air contained in the inner paint film is volatilized, and the dried paint film is broken to form a blast hole-solvent volatilization.
3. The surface to be coated is rough, and the paint cannot drive the air out of the surface in time.

Solution:
1. If necessary, the stirred paint needs to be filtered and painted.
2. Avoid painting in direct sunlight.
3. When coating the surface of the inorganic zinc-rich primer, it is necessary to first spray the diluent with a thinner mist to remove the air in the small hole of the surface, and then formally paint.
4. For the surface of the defect, it must be sanded and then repainted. When the area is large, it is necessary to re-blast the surface of the LED work light.

 

ABS LED Inspection Lamp with Rubber Paint Defect Name 13 –

Dirt under the paint(uneven appearance)

China led inspection lamp defective rubber paint 13

Defect performance: Uneven paint surface, poor adhesion of paint film of portable led work lights.
The rough surface causes early breakage of the paint film; the adhesion between the dirty surface and the paint film is poor.

Defect hazard:
The area where the dirt is present under the paint is the weak area of the paint film, and corrosion will first occur here.

Major Reason:
Inappropriate surface treatment, leaving residues such as abrasives, solder joints, welding fumes, dust, etc.

Solution:
1. The surface must be cleaned as required.
2. Check the surface of the LED portable light before painting. Rework must be required for areas that are not clean.
3. The area with defects must be sanded and removed to repair the paint. If the area is large, it needs to be re-blasted and painted.

 

ABS LED Inspection Light with Rubber Paint Defect Name 14 –

Water Spotting

China led inspection lamp defective rubber paint 14

Defect performance:
The portable led work lights surface forms a smooth pit under the gravity of the water droplets, and the surface color will be darker. With fog and whitening.

Defect hazard:
The decorative appearance of the paint film is defective.

Major Reason:
During the curing process, the surface of the paint film has condensation or other forms of water, which is generally caused by weather.

Solution:
1. Before the paint is cured, pay attention to protect the paint film and avoid the rain.
2. Exposure to the outdoors, due to the weather, water mist such as dew on the surface. 3. In order to improve the surface of the paint film, the surface of the defect needs sandpaper to polish the firefox to re-paint.

 

Rubberized LED Inspection Light with Rubber Paint Defect Name 15 –

Peeling and de-lamination

China led inspection lamp defective rubber paint 15

Defect performance:
Between the paint films, the adhesion between the paint film and the substrate is poor and cannot adhere to each other.

Defect hazard:
The paint film peeled off and the coating system could not be formed.

Major Reason:
1. There are residual pollutants such as water, oil, dust, and rust on the bottom surface.
2. The maximum coating interval of the excess primer when painting. For example: cross-linking coatings, like epoxy paints and polyurethane paints.
3. The surface to be coated is too smooth (the surface may be weathered and hardened for epoxy paints).
4. If the primer is not dry, apply the topcoat. The primer cannot be dried, and the curing fails, causing the paint film to fall off.
5. Amine white phenomenon.

Solution:
1. Before painting, confirm that the surface of the LED work light is dry and clean.
2. Master the maximum coating interval of the primer and apply it at intervals. If the maximum coating interval is exceeded, the surface of the LED work light must be treated as required before painting. 3. For a smooth surface, it needs to be ground to produce a certain roughness. 4. Master the minimum coating interval of the paint and check the dry cure of the primer before painting. 5. The area where the paint is peeled off must be completely removed and repainted.

 

Rechargeable LED Inspection Lamp with Rubber Paint Defect Name 16 –

Chalking

China led inspection lamp defective rubber paint 16

Defect performance:
In outdoor use, the paint film undergoes weathering due to climatic reasons, the gloss is reduced, the color is darkened, and the paint film is decomposed into a white powder.

Defect hazard:
The paint film of portable led work lights is thinner, the gloss is reduced, the color is darkened, the decoration is lost, and the anti-corrosion ability is lost.

Major Reason:
This lacquer cure occurs on most paints used outdoors, and the base material is destroyed by ultraviolet (UV) radiation.

Solution:
1. For paint films exposed to the outside, it is necessary to recommend a suitable coating system, especially a topcoat, which needs good weather For example, epoxy paint has poor weather resistance and is not suitable for use as a top coat outdoors. Acrylic resin and polyurethane paint have excellent weather resistance. Can be kept for many years and can be recommended for topcoat use.
2. The powdered paint film needs to be rinsed with high-pressure water to remove the powder on the surface and then repainted.

 

Cordless Rechargeable LED Inspection Lamp with Rubber Paint Defect Name 17-

Amine Blushing

China led inspection lamp defective rubber paint 17
Defect performance:
The surface of the portable led work lights paint film has a milky white wax (similar to fogging).

Defect hazard:
The coating on the surface where the amine white phenomenon occurs will result in poor adhesion between the paint films and peeling of the paint film.

Major Reason:
The main reason for this is the poor coating environment. When the surface temperature of the coated surface is lowered to the same or close to the dew point temperature, water vapor is generated on the surface of the coating surface due to the high humidity, resulting in an amine white phenomenon.

Solution:
1. The ambient temperature is controlled during the drying and curing process so that the surface temperature of the coated metal is always at least 3° higher than the dew point temperature, and the relative humidity is lower than 85%. Especially in the autumn and winter seasons, the amine white phenomenon is easy to produce due to the weather, and if it is not handled properly, it will have a great influence on the adhesion between the paint films.
2. The amine white phenomenon has appeared on the surface of the paint film, then the surface of the paint film should be cleaned with clean warm water, and then the LED work light should be painted next after it is completely dried.

 

China LED Inspection Light Defect Name 18-

Blistering, Voids

China led inspection lamp defective rubber paint 18

Defect performance:
After the paint film of the LED work lamp is exposed to the outside for a period of time, the obvious small bubbles appearing on the surface are called foaming.
After the paint film has just been applied, there is no abnormality on the surface, but after the paint film is opened with a knife, it can be found that there are spherical pores inside. This phenomenon is called stomata.

Defect hazard:
Voids: The area with pores does not adequately protect the steel structure.
Blistering: Damage to the paint film, which prevents the paint film from protecting the steel structure.

Major Reason:
The main reason for the formation of pores is that the paint at the time of coating contains a solvent or gas capable of absorbing water. Generally, the paint that has just been stirred is used; the humidity in the air is too high to cause such a defect. 2. The main reason for the formation of blistering is that the salt on the steel surface is too high. The current generated by cathodic protection also causes bubbles.

Solution:
1. The painting must be carried out under the conditions of the environment.
2. Stir the components of the paint well before use, then leave it for a few minutes before painting.
3. Check the salt on the painted surface and check if the salt of the abrasive is acceptable.
4. The portable led work lights surface cleaning work before painting must be taken care of.

 

LED Inspection Light in Rubber Paint Process

Key Tool has a full specification to control rubber paint production on Cordless Rechargeable LED Inspection Light and rubberized led camping lantern.

More professional knowledge of LED inspection lamp manufacture, pls refer to this article.

Welcome any wholesale and distributors enquire to [email protected]

 

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