Analysis of the rust of self-tapping screws:
1. The problem of electroplating process. When the electroplating factory is electroplating self-tapping screws, the drying is not dried, resulting in residual water vapor. Or condensation water is formed during packaging after drying, resulting in a chemical reaction and rusting of self-tapping screws. In addition, the electroplating is poor, and the electroplating layer is plated too much. Corrosion resistance becomes weak, resulting in rust.
2. Storage or use environment problems, long-term storage or use in the environment of salinity, acidity, high saltiness, high corrosion, high temperature, high humidity, over time, the self-tapping screw will be slowly corroded and oxidized , causing severe rusting.
The improvement method is as follows:
1. In terms of electroplating process, the electroplating color with a longer salt spray test time should be selected. When electroplating, the electroplating should be done well, and the electroplating layer should not be too thin. Qualified electroplating self-tapping screws can be used in environments with high salinity, acidity, high saltiness, high corrosion, high temperature, and high humidity 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 tray or shelf, and do not contact the ground. The storage environment should not be too humid, and should be ventilated and ventilated, and there should not be too much moisture.
