Electroplating, spraying, and phosphating are the three most commonly used processes in the field of metal surface treatment. Each of the three has distinct core functions—electroplating excels in protection and wear resistance, spraying is superior in aesthetics and wide adaptability, and phosphating is mostly used as an auxiliary pretreatment. The selection should be comprehensively judged based on material characteristics, service environment, performance requirements, and cost budget. The following is a detailed comparison and selection guide.

Auto parts are exposed to outdoor environments with intense sunlight, rain, and sudden temperature changes for long periods, while also needing to maintain the consistent appearance of the entire vehicle. Metal-plastic coating, with its dual advantages of "enhancing weather resistance and aesthetics", has become an indispensable key process in automobile manufacturing, providing comprehensive protection for various parts such as interior and exterior trims, and chassis components.

Dalian metal surface treatment, cadmium coating has good corrosion resistance, especially in marine atmospheric environments, with better corrosion resistance than other surface treatments. The waste liquid treatment cost in the process of electroplating cadmium is high, so it is not used in general industries and is only used in certain specific environments, such as fasteners for oil drilling platforms and Hainan Airlines aircraft.

Dalian surface heat treatment can significantly improve the fatigue strength of workpieces:

Dalian surface heat treatment can significantly improve the fatigue strength of workpieces. For example, the automotive half shaft made of 40MnB steel was originally quenched and tempered as a whole, but was changed to quenched and tempered+surface heat treatment, which increased its lifespan by nearly 20 times. In addition, surface heat treatment reduced the sensitivity of the parts to notches. The size of the outer panel mold is generally larger,

Surface treatment is a process of changing the surface of metal materials:

Dalian metal surface treatment is an ancient technology, and since there were humans on Earth, surface treatment has been a technology that humans have long mastered. 

What products are PC plastic particles used for

① Hand polishing tools. Manual polishing mainly involves using sandcloth to wrap wooden blocks (rubber blocks) or water sandpaper to wrap wooden blocks (rubber blocks) for polishing.