How to choose surface treatment for products
Almost all commercial fasteners are made of carbon steel and alloy steel, and are generally required to be corrosion-resistant. Therefore, the surface treated coating must adhere firmly and cannot fall off during installation and removal. On the other hand, for threaded fasteners, the coating also needs to be thin enough so that the threads can still be screwed after coating. The temperature limit of general coatings is lower than that of fastener materials, so the working temperature requirements of fasteners also need to be considered.
The main purpose of surface treatment is to enhance aesthetics and prevent corrosion. Due to the fact that the main function of fasteners is to fasten components, and surface treatment also has a significant impact on their fastening performance. Therefore, when choosing a surface treatment process, factors such as the torque and pre tightening force consistency of fasteners should be considered.
A high-level designer should not only consider structural design and manufacturing processes, but also pay attention to assembly processability, as well as environmental and economic requirements. Below is a brief introduction to some commonly used coatings for fasteners based on the above factors.