Fasteners are the most common components in mechanical equipment, and their function is also very important. However, corrosion of fasteners during using is the most common phenomenon. In order to prevent corrosion of fasteners during using, many manufacturers will take surface treatment after the production, which surface treatment methods can improve the fasteners to prevent corrosion phenomenon? There are four main surface treatment methods to prevent corrosion of fasteners.
Electroplating standard parts, this method is to put the standard parts into the metal solution, and then let the surface of the standard parts covered with a layer of metal by current, there are many effects on this layer of metal, for example, we can according to some different roles to select some different coating metals. Generally iron fasteners are protected against corrosion by galvanizing.
- heat treatment
Take heat treatment of standard parts, there are some standard parts, for example, the drill screws require a harder surface layer. Therefore, the self-drilling screws can be heat treated to ensure that the drill screws have sufficient hardness.
- mechanical plating
The mechanical plating of the standard parts allows the metal particles to be cold-welded to the standard parts to ensure some of the effects of the standard parts. Mechanical plating and electroplating are basically similar, except that we use different methods. The result can be said to be the same.
- the surface passivation
For passivation of standard parts, passivation mainly has two functions. One is to strengthen the hardness of standard parts, and the other is to make the oxidation of standard parts greatly reduced.
We can choose the most appropriate surface treatment method based on the specific needs. In this way, the fastener can play a better role in use.