Causes and prevention methods of corrosion of imported bearings
Corrosion of imported bearings is caused by various internal and external factors, which are summarized as follows:
1, metal surface finish (oxygen concentration difference battery corrosion).
2, the chemical composition and structure of the metal material itself.
3, the composition of the solution in contact with the metal surface and the pH;
4, ambient temperature and humidity.
5. Various environmental media in contact with the metal surface.
6, another person's sweat is also the cause of bearing corrosion, its pH is 5 ~ 6. Therefore, in order to prevent rust caused by hand sweat, the installation and production personnel should wear gloves, do not touch the imported bearings by hand.
Apply anti-rust oil to prevent skf bearing from rusting
1) Immersion method: Some small imported bearings are immersed in anti-rust grease. The thickness of the oil film can be achieved by controlling the temperature or viscosity of the anti-rust grease. A method of adhering a layer of rust preventive grease to the surface.
2) Brushing method: Pay attention to uniform application on the surface of the imported bearing when brushing, do not cause accumulation, and also pay attention to prevent leakage.
3) Spray method: Some large-scale anti-rust materials are not suitable for oiling by immersion method. Generally, the compressed air with a pressure of about 0.7Mpa is sprayed in an air cleaning place. The spray method is suitable for solvent-diluted rust preventive oil or thin layer rust preventive oil. This method must use sound fire protection and labor protection measures.
Pretreatment method for rusting the surface of skf bearing:
1, surface cleaning: cleaning must be combined with the nature of the imported bearing surface and the conditions at the time. Commonly used methods are solvent cleaning, mechanical cleaning, and chemical cleaning.
2, the surface is dry and cleaned, and then dried by filtered dry compressed air. Or use a dryer to dry at 120~170 °C, and finally dry with a clean gauze.
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