Metal screw rust causes analysis: 1. Electroplating factory plating metal screws, drying did not dry, resulting in residual moisture. Or condensed water forms when it is packaged after drying. Causes a chemical reaction that causes an undesirable occurrence and causes the metal screw to rust. 2. Long-term storage in wet areas, for a long time, the metal screws are slowly corroded and oxidized, causing serious rust. 3. When electroplating hardware screws, the plating is poor, and the electroplating layer is too plated. Causes rust. In summary, analyze the reasons from four aspects. These four directions are: 1. Storage environment 2. Plating type 3. Storage method 4. Use environment.
Improvement measures: Storage environment: We must put the hardware screws in a suitable environment, should not be too humid, should be ventilated, ventilated, there should not be much water vapor place. There should be a bracket that puts the hardware screws out of contact with the ground. Plating types: The plating color should be selected for a longer time for the salt spray test. When electroplating is done, the electroplating layer should not be too shabby. The preservation method is similar to the storage environment, and it cannot be placed in a wet place. The use environment is similar, and cannot be placed under salinity, acidity, saltiness, high corrosion, high temperature, and high humidity.