Bearing and bearing steel rusty some doubt? Watching the second understand!

Problem a: bearing steel will rust? Will rust. Bearing steel, including stainless steel rust. Although stainless steel which does not rust, also is rusty, actually, in fact, no not rusty steel in the world! Question 2: how do bearing steel rust? The so-called stainless steel, is refers to the degree of corrosion. Corrosion rate < 0. 01 mm/y, think 'completely corrosion'; Corrosion rate < 0. 1 mm/y, is considered 'corrosion'; Corrosion rate> 0. 1 mm/y, don't think 'corrosion', namely ordinary steel. Bearing steel in addition to a few is stainless bearing steel, mostly common corrosion resistance of steel, so it is no wonder that rust, is normal. Question 3: why would rust bearing? Bearing rust and relevant materials, the use of the environment, the bearing steel itself contains carbon composition, meet water will react. Can't make the bearing rust is good antirust processing. Or choose the steel bearing. Metal products, easy to rust after oxidation, stainless steel bearings is no exception. There are many factors influence its rusty: such as chemical composition and structure of the metal material itself; Surface finish ( The oxygen concentration cell corrosion) ； Contact with the metal surface composition and pH value of solution; And its surroundings, such as a number of factors, these are the direct factors of rust bearing. In addition, when we use bearing, do not direct contact with the hand goods, because when sweat in contact with the bearing, the bearing surface to form a film of sweat, sweat membrane causes of bearing of electrochemical action, corrosion of the bearing. So, we want to use the special gloves or refers to the set of special tools to take such as bearing, don't direct contact with the hand. Problem four: GCr15 bearing steel quality bearing in outdoor environment will rust? Will, but also, and the general steel samples will rust heavily, the Cr content of the steel is too little, the value of the back of the bearing steel is the Cr content, the unit is one over one thousand, the Cr content of GCr15 only 1. About 5% and Cr content if I can close to 13% in this line, antirust effect is better, such as Cr12 ( Contain Cr12 %) Kind of steel is basic doesn't rust. Problem five: can bearing steel rust? Bearing steel although Cr content is higher, antirust effect to a certain extent, but the Cr content less steel, GCr15 Cr content is only 1. This time around 5%, Cr element is the role of improve the mechanical properties of steel, bearing steel of Cr is in order to improve the hardenability is not used for rust prevention. And general metal, humid environment will cause corrosion. So the bearings and their parts rust prevention measures is very necessary. Question 6: bearing rust prevention? 1, the surface cleaning: cleaning must be based on the nature of the antirust surfaces and conditions at that time, select the appropriate method. There are usually used solvent cleaning, chemical cleaning and mechanical cleaning. When surface available filter after dry clean dry compressed air blow dry, or in 120 ~ 170 ℃ dryer for drying, also can use clean cloth to wipe dry. 2, the method of coating anticorrosive oil ( 1) Soak method: small bearing by soaking in antirust oil, make its surface adhesion on a layer of anti-rust oil. The temperature of the oil film thickness can be controlled by anti-rust oil or viscosity to achieve. （ 2) Method: used to brush the of large bearing shall not apply to the soaking or spraying, brush should not only pay attention to the no accumulation, also should pay attention to prevent leakage. （ 3) Spray method: some of the biggest bearing cannot be oiled 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, but must use perfect fire protection and labor protection measures.