The cause of the imported bearing corrosion - bearing knowledge and prevention methods

Imported bearing corrosion causes and prevention methods of bearing corrosion is caused by a variety of internal and external factors, induces mainly has: 1, metal surface finish ( The oxygen concentration cell corrosion) 。 2, metal material chemical composition and the structure itself. 3, contact with the metal surface composition and pH value of solution; 4, the environment temperature and humidity. 5, the various environmental medium metal surfaces in contact with. 6, the other person's sweat is why cause bearing corrosion, its pH value of 5 ~ 6. So in order to prevent hand sweat cause corrosion, installation and production personnel should wear gloves, don't literally hand contact imported bearing. Tu rust-proof oil to prevent SKF bearing rust 1) Soak method: small import bearings by soaking in antirust oil, oil film thickness can be controlled by the antirust oil temperature or viscosity to achieve. Make a layer of anti-rust oil on its surface adhesion method. 2) Brush method: evenly daub when you brush by in the imported bearing surface, do not build up, also should pay attention to prevent leakage. 3) Spray method: some big rust is not suitable for oil by soaking method, generally about 0. 7 mpa pressure filtering compressed air spraying where clean air. Spray method used solvent XiShiXing rust-proof oil or thin layer of anti-rust oil. This method must be used to perfect fire prevention and labor protection. SKF bearing surface rust pretreatment method: 1, the surface cleaning: cleaning must be combined with the properties and the conditions of the imported bearing surface. Methods are usually used solvent cleaning, mechanical cleaning and chemical cleaning method. 2, the surface after dry clean dry compressed air to blow dry available filtering. Or use dryer to 120 ~ 170 ℃ temperature drying, the final use clean cloth to wipe dry.