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Rolling corrosion causes and prevention of corrosion by a variety of bearing intrinsic and extrinsic factors that caused summarized in:
1, the metal surface finish (oxygen concentration differential cell corrosion).
2, the metal chemical composition and structure of the material itself.
3, the solution in contact with the metal surface composition and pH value;
4, the ambient temperature and humidity.
5, with the metal surface in contact with environmental media.
6, another person's sweat also lead bearing corrosion reason, it had a pH of 5-6. Therefore, in order to prevent corrosion caused by hand sweat, installation and production personnel should wear gloves, it should not touch the bearing.
Oiled to prevent rust bearings
1, soak method: some small rolling by immersion in anti-rust oil, the oil film thickness can be controlled by anti-rust oil temperature or viscosity to achieve. Adhesion to the surface layer of rust grease approach.
2, brushing method: Brush the attention smear even bearing surface, do not produce accumulation and pay attention coated to prevent leakage.
3, the spray method: Some material not suitable for large-scale anti-rust oil coating by immersion method, generally about 0.7Mpa pressure filter with compressed air spray cleaner place. Spray application of anti-rust oil or solvent dilution thin rust oil. This method must be improved fire protection and labor protection measures.
Rolling rusty surface pretreatment methods:
1, surface cleaning: The cleaning properties of the surface must be combined bearing and the prevailing conditions. Commonly used methods are solvent cleaning, mechanical cleaning and chemical treatment cleaning method.
2, the surface is dry cleaned and dried filtered compressed air available. Or a dryer with a temperature of 120 ~ 170 ℃ dried, and finally dry with a clean gauze.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7204BEA NSK | 20 | 47 | 14 |
| 7204B NSK | 20 | 47 | 14 |