Analysis of the reasons for the rust of self-tapping screws:
1. The problem of electroplating process. When the electroplating factory is electroplating self-tapping screws, it is dried without drying, resulting in residual water vapor. Or, after drying, condensed water is formed during packaging, which causes a chemical reaction and causes the self-tapping screw to rust. In addition, the electroplating is poor, and the electroplating layer is too thin. Corrosion resistance becomes weak, resulting in rust.
2. Storage or use environment problems, long-term storage or use under salinity, acidity, high saltiness, high corrosion, high temperature, high humidity environment, after a long time, the self-tapping screw will slowly be corroded and oxidized , Resulting in severe rust.
The improvement methods are as follows:
1. In terms of electroplating process, the electroplating color with a longer salt spray test time should be selected. Electroplating should be done well, and the electroplating layer should not be too thin. Qualified electroplating self-tapping screws can be used in salinity, acidity, high saltiness, high corrosion, high temperature, high humidity environments and have a good anti-rust effect. In order to further improve the anti-rust ability, you can consider spraying anti-rust paint.
2. In terms of storage environment, put the packaged self-tapping screws on the pallet or shelf, and do not touch the ground. The storage environment should not be too humid and should be ventilated and ventilated, and there should be no place with too much moisture.
