When we produce combination screws, in order to achieve some goals and make the fasteners richer, we usually choose to coat the surface, such as coating the surface of the combination screws, which not only can make the service life of the combination screws get better A big improvement can also ensure that it is even better at work.

Let it form a uniform, protective layer on the surface of the combined screw. And after processing, we can see that the aesthetics have been raised to a level. Not only has the high temperature resistance been greatly improved, but also the corrosion resistance has been greatly improved.

1. Electroplating. It is to put the place where the combination screw needs to be plated into a metal-containing aqueous solution, and then plated with electric current. The plated metal can be selected according to the needs. In the selection process, it is necessary to analyze whether it can be closely connected with the wire.

Second, mechanical plating. The coating is mainly produced by combining metal powder by some physical means or chemical means.

Third, hot dip galvanizing. The part of the combination screw that wants to be plated is integrated into the plating tank of molten zinc with a heat of about 510 ° C to cause passivation. This kind of coating can improve the performance of the bolt and is favored by many fastener companies.