NTN Bearing rust the main reason

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Cause corrosion of the following main reasons:
1, some enterprises in the process of production NTN bearigno strict cleaning rust proced ures and oil seal anti-rust packaging requirements NTN bearings of NTN bearing parts and assembly process after finished rust treatment. Such ferrule in the turnover process turnaround time is too long, and the outer ring cylindrical contact with corrosive liquids or gases.
2, some enterprises used in the production of anti-rust lubricant, cleaning products such as kerosene quality up to less than the requirements set by the technology.
3, NTN Bearing steel prices dropped lower and lower, resulting in the gradual decline of NTN Bearing steel. Such high levels (elevated sulfur content of steel in the material decline in anti-corrosion performance), the deviation of the microstructure of steel in non-metallic impurities. NTN Bearing steel sources now manufacturers are more mixed, the quality of steel is the mixture of ichthyosaur.
4, some enterprises in poor environmental conditions, the high content of harmful air turnover venue is too small, it is difficult to carry out an effective anti-rust treatment. Coupled with the hot weather, the phenomenon is also no lack of existence of production workers in violation of antirust rules and procedures.
5, some companies rust paper, nylon paper (bags) and plastic tube the NTN Bearing packaging material does not meet one of the factors that the scroll the NTN Bearing Seal antirust packaging requirements are also cause corrosion.china ball bearing
6, some enterprises NTN bearing rings Turning margin and small grinding allowance, oxidation on the outer skin of decarburization not fully remove one of the reasons.