The main causes of corrosion are as follows:
1. In the process of producing SKF bearings, some enterprises did not strictly follow the requirements of cleaning anti-rust regulations and oil seal anti-rust packaging for anti-rust treatment of SKF bearing parts and SKF bearing products after processing. If the ferrule has a long turnaround time during the turnaround, the outer ring of the outer ring is exposed to corrosive liquid or gas.
2. The quality of anti-rust lubricating oil and cleaning kerosene used by some enterprises in production cannot meet the requirements of process technology.
3. As the price of SKF bearing steel drops and then falls, the material of SKF bearing steel gradually declines. For example, the content of non-metallic impurities in the steel is too high (the increase in sulfur content in the steel causes the corrosion resistance of the material itself to decrease), the metallographic structure deviation, and the like. The source of SKF bearing steel used by the production enterprises is more complicated, and the quality of the steel is even more.
4. Some enterprises have poor environmental conditions, high levels of harmful substances in the air, and too little turnover space, making it difficult to carry out effective anti-rust treatment. Coupled with the hot weather, production workers violated anti-rust procedures and other phenomena.
5, some enterprises' anti-rust paper, nylon paper (bag) and plastic cylinders and other SKF bearing packaging materials do not meet the requirements of rolling SKF bearing oil seal anti-rust packaging is also one of the factors causing corrosion.
6. The turning allowance and grinding allowance of some SKF bearing rings are small, and the oxide scale and decarburization layer on the outer circle are not completely removed.
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