Custom m1.2 thin head yellow zinc plated machine screw

Industry knowledge：

What are the reasons for the rust of self tapping screws?

① Causes of screw rust:

1. Electroplating process problems: when electroplating self tapping screws, the electroplating factory did not dry the water, resulting in water vapor residue. Or after drying, condensed water is formed during packaging, resulting in chemical reaction and rust. In addition, due to poor electroplating, the plating layer is too thin, the corrosion resistance becomes weak, and rust will also occur.

2. Storage or use environment problems. If it is stored or used in the environment of salinity, acidity, alkalinity, high temperature and humidity for a long time, the self tapping screw will be corroded slowly, which will lead to rust.