NSK bearing corrosion prevention methods and measures
Causes and prevention methods of NSK bearing corrosion NSK bearing corrosion 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 and the pH value in contact with the metal surface;
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 sweat, installation and production personnel should wear gloves, do not touch NSK bearings by hand.
Apply anti-rust oil to prevent NSK bearing from rusting
1. Immersion method: Some small NSK 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 evenly spread on the NSK bearing surface when brushing, do not produce accumulation, but also pay attention to prevent leakage coating.
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 the 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.
NSK bearing surface rust pretreatment method: 1, surface cleaning: cleaning must be combined with the nature of the NSK bearing surface and the conditions at the time. Commonly used methods are solvent cleaning, mechanical cleaning, and chemical cleaning. 2. Dry and clean the surface and dry it with filtered dry compressed air. Or use a drier to dry at a temperature of 120-170 ° C, and finally dry with a clean gauze.
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