1, the chain in the production process is not strictly in accordance with the requirements of the process of the chain parts and finished after the finished product chain rust treatment.
2, the use of rust-proof lubricants, cleaning kerosene and other product quality does not meet the requirements of the technical requirements.
3, due to the price of the chain steel gradually reduced, resulting in chain steel material gradually decline. Such as high content of non-metallic impurities in steel and microstructure deviation. Production chain used in the production chain of steel material is poor.
4, the chain of manufacturing enterprises located in the poor environmental conditions, high concentrations of harmful substances in the air, the working space is too small, it is difficult to carry out effective anti-rust treatment. Coupled with the hot weather, the production workers in violation of anti-rust procedures and other phenomena are also there.
