Why does metal stamping parts appear corrosion

The application of metal stamping parts in life is very extensive, involving every aspect of everyone's life. During the use of metal stamping parts, we often find corrosion on the surface of metal stamping parts, so why does metal stamping parts appear to be corroded? Next, precision will spread the knowledge to you. 1. The internal elements of rusting of metal materials: From a thermal perspective, metal materials have higher kinetic energy than its corroding substances, which are not stable, and have a spontaneous development trend of conversion to low kinetic energy corroded substances. In other words, rusting of metal materials is a weather phenomenon. Most of the metal materials in industrial production are multi-component aluminum alloys. The alloy composition is different, there are residues, the deformation of mechanical equipment is uneven, and the ground stress is everywhere. Unbalanced wait! This is physical, organic chemistry, and the unevenness of photoelectrocatalysis. When the surface layer produces shrinking water, it is inevitable that organic chemistry or electrochemical reactions will occur! 2. The external elements of electrochemical corrosion: 1. The influence of relative temperature. The higher the air humidity in the air, the thicker the shrinkage water on the metal surface. The oxygen in the air has the effect of shrinking the water to the metal surface. When the air humidity reaches a certain standard value The erosion rate is greatly increased, and this standard value is called the critical value of air humidity! The critical air humidity of steel is about 70%! 2. Temperature hazards. In a dry natural environment, the working temperature is related to the air humidity. Metal materials are not easy to rust even if the average temperature is high. When the air humidity reaches the critical point, the temperature hazard is obviously aggravated. An increase of 10°C will double the rust rate. Therefore, in the cold and humid subtropical or rainy, the higher the average temperature, the more serious the rust! Therefore, metal materials are not easy to rust without water and CO2. 20% of the volume in the air is CO2. He said that it is impossible to prevent it! 3. The hazards of other air supplies: when the air contains corrosion resistance, sulfur dioxide, hydrogen chloride, and dust, it will accelerate the erosion. Therefore, the size difference of erosion under different natural environments is obvious. Large cities are higher than villages. The industrial park is higher than the dormitory area, the coastal area is higher than the inland area, and the high smoke and dust are higher than the low smoke and dust! [Related recommendation] Learn more: What are the methods for polishing the surface of stainless steel? Learn more: Manufacturing characteristics of automotive stamping parts molds Learn more: Points to note in the design of continuous stamping dies