The cause of the bearing corrosion

2020 - bearing corrosion reasons 10 - What kind of 27 common bearing corrosion are there? 1, embroidered yellow sheet; 2, honeycomb pitting corrosion; 3, fingerprints, rust; 4, zone rust; 5, black imprint rust; 6, black spots; 7, bruising, scratches, chafing, billet caused by corrosion. The main culprit of corrosion of the bearing: 1, metal surface finish, The oxygen concentration cell corrosion) 。 2, metal materials chemical composition and the structure itself. 3, contact with the metal surface composition and pH value of solution. 4, environmental temperature and humidity. 5, and various environmental medium metal surface in contact. 6, people sweat is why cause bearing corrosion, its pH value of 5-6. Therefore, in order to prevent hand sweat caused by corrosion, installation and production personnel should wear gloves, don't contact with the hand bearing. Common bearing corrosion situation: 1, some enterprises in the process of production of bearing no rust cleaning procedures and oil seal antirust packing in strict accordance with the requirements of bearing parts in the process of machining and assembly after antirust processing of bearing products. Such as ring in the process of turnover turnover time is too long, outer cylindrical contact corrosive liquids or gases, etc. 2, some enterprises in the production of antirust oil, cleaning products such as kerosene used quality can not reach the requirements of the technology. Part 3, the poor environmental conditions of the enterprise, harmful content is high in the air, flow field is too small, it is difficult to effectively antirust processing. Coupled with the hot weather, the production workers in violation of the phenomenon such as antirust procedures were there. 4, some enterprises anti-rust paper, nylon paper ( Bag) And a bearing packaging materials such as plastic cylinder does not accord with the requirement of rolling bearing oil seal rustproof packaging is one of corrosion factors. 5, some enterprises bearing ring of turning small allowance and allowance of grinding, the oxide coating on the cylindrical, failed to completely remove decarburization layer is also one of the reasons. How to prevent bearing rust? 1, soaking method: small bearing 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, brush note evenly daub on the 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 adopted perfect fire protection and labor protection. （ Source: equipment maintenance services)