INA bearing corrosion is mainly divided into metal corrosion and human hand sweat, metal corrosion accounts for the majority, in many cases can not be avoided. Hand sweat can also cause INA bearing corrosion, mainly when sweat contact will produce a sweat film on the surface, the interaction will cause electrochemical reaction and lead to corrosion, but can be avoided, such as tools with gloves to take parts.
Metal corrosion mainly includes:
1 surface finish; 2 chemical structure and composition of metal materials; 3 solution composition and pH value of metal surface; 4 environmental medium; 5 ambient humidity and temperature.
Anti-rust pretreatment method:
Keep the surface clean and clean the appropriate method. General chemical treatment cleaning, mechanical cleaning and solvent cleaning methods. After the surface is cleaned, it can be dried by dry compressed air. It can also be dried with a dryer at 120~170 °C, and then dried with a clean gauze.
(1) Spray method
For example, some large-scale anti-rust materials can not be immersed in oil, mainly suitable for thin-layer anti-rust oil or solvent-diluted anti-rust oil, but pay attention to labor and fire protection measures.
(2) Brushing method
When brushing, it is not only necessary to avoid accumulation, but also to prevent leakage. It is generally suitable for some special-shaped products or outdoor construction equipment that do not use soaking or spraying.
(3) immersion method
The oil film thickness can be achieved by controlling the temperature or viscosity of the rust preventive grease. Some small items are immersed in anti-rust grease to adhere a layer of anti-rust grease to the surface.
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