How to paint auto body parts?

2019-11-18 11:38:57

Sheet metal parts are processed on metals of different properties. There is a certain demand for metal materials in the process of sheet metal processing. Of course, this is not only the demand for sheet metal integrity, but also for the surface of metal. For example, whether the metal is over oxidized or not, there is a demand for gold in the process of sheet metal processing of chassis cutting drum cabinet Genus cannot be oxidized. In addition, the thickness of metal is required to exceed the thickness of the product after disposal. However, in practice, there is hardly any metal that has not been oxidized, so how to dispose of the metal that has been oxidized?

The stainless steel in the processing operation is usually processed by rolling plate, binding edge, welding or artificial surface heat treatment to form black oxide skin. This kind of gray black oxide skin is rich in nicr2o4 and NIF, which were removed by hydrofluoric acid and nitric acid in the past. However, this method is gradually abandoned by the box cabinet sheet metal processing industry because of the pollution of the environment, the harm to the human body, the corrosive contrast and the large cost. At that time, there were two ways for sheet metal processing plants to deal with oxide skin:

After chemical method: use a kind of pollution-free pickling passivation paste and normal temperature non-toxic cleaning solution with inorganic additives for immersion. So as to achieve the whitening treatment of stainless steel. The metal equipment treated in this way looks dull. This method is more suitable for large and disorderly products.

I. painting type of auto body parts:

1. General paint is a simple and common car paint. Features are low cost, simple technology, but its gloss is not good, surface hardness is not high, especially simple scratch. So although this kind of paint has advantages in quotation, it is rarely used in cars, most of which are used in trucks and buses

2. Metallic paint, also known as metallic bright paint, is a popular car finish. The metallic paint is based on the general paint plus aluminum powder, plus a layer of varnish to protect it, so it looks very bright in the future. The main feature of metallic paint is not only its high brightness, but also its hardness is much higher than that of ordinary paint. Ordinary objects do not simply scrape it off, so cars, especially high-grade cars, have basically used metallic paint

3. Pearlescent paint, also known as mica paint, is also a popular car finish. Its principle is basically the same as that of metallic paint. Pearlescent paint gives people a novel, colorful and dazzling feeling.

II. Paint treatment

Paint surface treatment is the final process after finishing paint. For electric car body and paint surface treatment, there will be fine fish scale phenomenon in some electric car loading paint, which is a natural phenomenon caused by the dull time difference of paint film in the process of leveling. We usually can't detect it. If we want to cheat the experts' eyes, we have to do paint surface treatment, which we generally call Is specular. Use the beauty sandpaper for leveling and grinding, and then use the coarse wax composed of pumice or clay to grind and cut to remove the traces of sandpaper. Next, use the fine cutting wax to grind to remove the traces of coarse wax, then use the reducing agent to achieve the perfect luster, and then use the mirror surface treatment agent to completely remove the halo and wipe the traces. At this time, the paint reaches the deep luster, and the final process is glaze sealing, In this way, the perfect paint effect can be achieved.