Treatment of Fading and Losing Gloss of Automotive Paint Surface

Treatment of Fading and Losing Gloss of automotive paint Surface

When the car is in use, the color of the paint surface gradually becomes lighter and loses its original luster. This is the fading and loss of luster of the paint surface. If the car paint surface fades or loses light, the cause should be correctly judged and corresponding measures should be taken to control it.
1. Causes and types of auto paint fading and loss of light
(-) Causes of Car paint fading and loss of light
1. Reasons for car painting
(1) The weather resistance of the coating used is poor, and it is easy to fade and lose light under adverse weather conditions.
(2) The paint used has poor light resistance, and is prone to fading and loss of light when exposed to strong light.
(3) The coating used has poor scratch resistance, and is prone to fading and loss of light during car cleaning and wiping.
2 Reasons for car use
(1) The use environment is bad. Cars are driven or parked in heavily polluted cities such as mining areas, construction sites, industries, restaurants, barbecues, etc. with heavy smoke, coastal areas with severe salt spray, and areas with large temperature and climate changes. Both will cause the body paint surface to be corroded and damaged, causing the paint surface to fade and lose light.
(2) The parking environment is poor. Cars are often parked in the open air, subject to natural erosion such as wind, sun, rain, etc., resulting in fading and loss of gloss on the paint surface.
(3) The impact of traffic film. The traffic film is an electrostatic layer formed on the surface of the car body paint and air friction when it is running. Since the electrostatic layer is easy to absorb corrosive substances such as dust and harmful gases, the paint surface will fade and lose its luster.
3. Reasons for car cleaning
(1) The quality of all cleaning agents is poor, especially the use of strong alkaline cleaning agents will directly erode the paint surface.
(2) The water quality is not clean and contains corrosive substances or acid and alkaline substances, which will directly cause erosion of the paint surface and make the paint surface lose its luster.
(3) The water pressure is improper, the water pressure is too high during washing (normal car washing, the pressure gauge of the car washing pump shows that the water pressure cannot exceed 7 pressures), so that the bright layer of the car body paint is washed away and loses its color.
(4) Improper car washing method. When washing the car, if you wipe it without rinsing it, there are often floating dust and sand particles on the paint surface of the car body, which will scratch the paint surface and cause scratches, thus making the paint lose its color and luster.
(5) The car towels used for car washing are not professional. Many beauty shops use non-professional towels in order to save money.
4. Reasons for paint care
(1) The care of the paint surface is not timely, so that the paint surface cannot be properly protected.
(2) Paint care products are of poor quality and cannot protect.

5. Other reasons
(1) lens effect. The so-called lens effect means that when there are small water droplets on the paint surface of the car surface, because the water droplets are in the shape of a flat convex lens, under the sunlight, they have a focusing effect on the sunlight, and the temperature at the focal point is as high as 800-1000 ° C, which causes the paint surface to be damaged. Corroded, small holes invisible to the naked eye appear, some reaching as deep as the metal substrate. Due to the lens effect, the paint surface will be scratched. If the damage range is large and the distribution density is high, the paint surface will be severely lost.
(2) Natural aging. Since any kind of coating has a certain service life, it will increase with the use of time. Oxidative corrosion of the paint surface is inevitable, so that the paint surface gradually ages, and fading and loss of light are only one of the external manifestations of paint surface aging. It is worth mentioning that; all the paint care work we do can greatly delay the aging Speed of the paint.
(-) Types of paint fading and loss of gloss
1. Fading and loss of light caused by harmful substances Use a magnifying glass to observe the paint surface of the car body. If there are holes of irregular size on the surface of the paint surface, most of these fading and loss of light are caused by harmful substances. Because the paint surface is exposed to the outside for a long time without any protective measures, various harmful substances adhere to the surface of the paint surface and gradually penetrate, forming voids of irregular size that are invisible to our naked eyes. It is easy to hide dirt and dirt, which will inevitably affect the permeability of the paint surface. Just like brushing a thin layer of paint on transparent glass, the paint surface will lose its gloss, and the color of the base paint layer will also be covered by this layer of oxide, losing its original bright color.
2. Fading and loss of light caused by oxidation
Use a magnifying glass to observe the paint surface of the car body. If there are no obvious scratches and few spots on the paint surface, the cause of such fading and loss of light is mostly caused by oxidation-reduction reactions.
3. Scratches lead to loss of gloss
When there are many fine scratches distributed on the paint surface, blood does not damage the primer layer, especially more obvious under strong light irradiation, this kind of loss of light is caused by shallow scratches.
4. Fading and loss of light caused by lens effect
When the cleaned paint surface is carefully observed with a magnifying glass, there are many spots on the paint surface. These spots are actually burnt holes, and the fading and loss of light are caused by the lens effect.
2. Prevention and treatment of paint fading and loss of light
(1) Prevention of paint fading and loss of light
Timely and scientific maintenance of the paint surface is an important measure to delay the fading and gloss loss of the paint surface. Its maintenance operations mainly include:
(1) Use high-quality cleaning agents and correct cleaning methods to clean the car, so as to remove harmful substances on the paint surface in time.
(2) After rainy or foggy days, wipe off the water droplets on the surface of the paint surface in time to prevent the lens effect.
(3) Use high-quality car wax to polish and wax the paint surface in time to form an upper layer of protection on the paint surface
layer to isolate the paint surface from contact with the air and prevent oxidation and corrosion. The residence time of car wax on the Car Paint is generally 15-20 days, so the waxing of car paint should not exceed 15-20 days. (4)
Sealing glaze, coating or plated finish can protect the car paint longer: sealing glaze can last for 3-6 months at a time; coating can last for 6-12 months at a time; The product can protect the car paint continuously for 1~3 years each time.
(5) Improve the car parking environment and prevent natural erosion.
(6) Install a static discharge device on the car to prevent the generation of traffic film.
Treatment of paint fading and loss of light
1. Grinding and polishing
For the fading and loss of light caused by mild natural aging and shallow scratches, it can be cleaned and polished first to eliminate the fading and loss of light on the surface; then wax polishing and mirror surface can restore the gloss of the paint surface.
2. Colored wax
Colored wax is also called colored wax. The main function of this kind of wax is to increase color. It belongs to a single polymer wax and contains a small amount of colored glaze. It can make the car paint of the same color system more beautiful. Because the color wax has the functions of adding color, filling and covering, it can restore the faded and dull paint surface.
3. Paint renovation
For the fading and loss of light caused by severe natural aging and lens effect, and the paint is seriously damaged, the paint surface should be repaired and sprayed.