Automotive coating process and the relationship between automotive coatings and salt spray test chambers

Cars are the most common land vehicles in modern society. The environment, climate and road conditions used are complex and varied. For this reason, they need good weathering, corrosion resistance, scratch resistance and stone resistance. It should have good light retention, color retention, no powdering, no shedding, no blistering, no rust in the environment of sun exposure, rain, wind and sand impact, alternating wet and dry, cold and heat change, salt spray and acid rain erosion. ability. Therefore, each product needs to use environmental test equipment to test and judge whether it is qualified before leaving the factory. The use of salt spray test chamber is the most common.

A typical car body coating line generally consists of a pre-paint phosphating line, a cathodic electrophoretic primer line, a sealed vehicle paint coating line, a medium coating line, a topcoat line and a post-treatment line. In order to obtain the durability and corrosion resistance of the automobile coating, the automobile body is treated by phosphating as a pretreatment of the coating, and the function of the phosphating film is to improve the adhesion of the coating film (electrophoretic coating film) coated thereon. And corrosion resistance. After more than 20 years of continuous improvement, the cathodic electrophoretic coating process has become one of the most mature primer technologies for automobile bodies, wheels and frames. For the car body, there is no substitute for its more advanced primer. method.

Electrophoretic paint gives the body rust, impact and corrosion resistance. The salt spray test chamber is used to detect the anti-corrosion results, and the electrophoresis has better uniformity of coating uniformity compared to other spray coatings, and can be applied to the inner cavity of the structural parts of the automobile frame, parts, etc. The concealed interior greatly enhances the corrosion protection of the inner cavity of the workpiece.