NSK bearings are particularly sensitive to corrosion problems, rolling surface corrosion or fall into the rolling surface rust will lead to the early failure of bearing, and the ring wall and rolling surface corrosion or rust pollution, will be a feature of corrosion performance strong bearing excessive wear of the early: holder and guide rib or raceway on the scale are pale gray, and metal substrate with relatively tight, serious rust is dark grey, high metal surface. Dirt damp or splash on the part of often appeared as spot-like dark rust, development of black rust holes, and then become dark brown rust area, and the formation of a large area of rust Brown block is easy to fall off. NSK bearing once rust that can not be used, so that not only itself short service life, working life of the rust will endanger other bearing or gear components.
1, reason: the hand directly contacting the NSK bearing, this is the most easily overlooked and influence countermeasure factors most widely: hands must be washed and coated with antirust grease, or wear a non-corrosive cleaning gloves, are allowed to contact bearing.
2, reason: dirt, dust mixed with bearing countermeasures: take clean dust, pollution prevention measures.
3, reason: the intrusion of moisture, wet environment, bearing cooling of dew point in the park, bury gas moisture condensed droplets attached to the bearing countermeasures: take waterproof sealing measures, anti-rust agent is added in the bearing lubricant, antirust measures taken on the bearing, bearing always works in low temperature and moist environment should adopt stainless steel material.
4, reason: air containing carbon dioxide and sulfur dioxide, offshore also containing chloride solutions: adopt anti-corrosion measures for bearing, or used by the high bearing corrosion material.
5 reasons: lubricant additive acidification or metamorphic countermeasures: the replacement of lubricants or use high-quality lubricant..
6, reason: NSK bearing contact to a light metal or non conductive body, cause to prevent potential order galvanic corrosion potential order of galvanic corrosion measures: avoid contact with hinge light metal or non conductive body. Rust is not complete in a wet environment inventory for too long, or the machine parking period for too long the Countermeasures: strengthen management, strengthen the antirust measures.