Rust prevention work of rolling bearings

Bearing rust prevention work is an important work, especially the antirust between process, like bearing in the heat treatment workshop after pickling, cleaning, grinding, there are many working procedure. When the product is not the water consumption, a time to will be stored in the middle of the rolls, the end of processing and process between the storage of bearing ring rust must stop. Process between the antirust ordinary USES method has the following kinds: 1. Immersed in the rust groove bearing trap immersed in 5% sodium nitrite and 0. 6% aqueous solution of sodium carbonate, the rust prevention effect is good, but to many rust slot devices such as, takes up a lot of space, when management also the inconvenience. 2. Dip-coating concentrated sodium nitrite solution will product after cleaning, immersed with 15% 20% of sodium nitrite and 0. 6% sodium carbonate solution, and then it piled up. Using this method the antirust period is shorter, ordinary only insist on 7 - 14 days, and in the rainy season, because of the humid weather can only insist on 2 - 3 days is required to dispose of, demand expensive manpower and money. 3. Like waste oil coated with anti-rust oil. This method must be in execution of a process line cleaning, to compare. New anti-rust process measures introduced through jointly with the relevant manufacturer, the consumption theory marked for many years, antirust stop repeatedly between the process improvement, to adopt spraying antirust effect match good. Initially for roller rust to stop the trial, and a half to scrap and waste aqueous solution with sodium nitrite wash once a day, after 3 months to sample the results found no rust, is used for the bearing trap half scrap now spraying antirust, effect also is so. Spraying type anti-rust match simple technics, the method is as follows: 1. Equipment and construction on the basis of half a few storage of waste, to set up a middle library, the air with the cement floor, can be set up between a footpath, about 1. 5 m, which is used to pass bearing ring car. Put a deposit at the end of the channel sodium nitrite solution pool, solution formula for 5% Add 0 10% sodium nitrite. 6% sodium carbonate, and completes the HuiShuiGou in the air, and then put the bearing ring stacked on the floor on both sides, each pile bearing ring between 0. 6 m in the hallway. To tell the middle library design is about 64 m2, the sodium nitrite solution pool for 1 m3. 2. Processing method with sodium nitrite solution every morning washing time, absorption in aqueous solution by water pump from pools to come out, the rubber pipe into the shower, wash bearing ring like spraying. Rinse water solution by HuiShuiGou flow back into the pool, pool in the end of the HuiShuiGou top, made a fine wire and gauze filter with grime textile ash content into the sink. Middle library should be with good quality and clean. Pool once every 2 days testing, the solution on the basis of test results to stop, pool solution to change within the time limit according to the different months to stop, 4 - September swap thoroughly once every 2 weeks, October - In march the following year, swap once a month. Match bento conclusion spraying antirust, management, and labor saving, the middle library used two rust is not complete, now with a person also can and do other work, from the antirust effect is also significant. In March 2003 to 7002136 and 3620 roller of more than 4000 grain, adopted spraying type anti-rust, nearly more than a year to persist in very light, no rust. In addition also has a lot to save cost of chemicals, the roller workshop monthly costs more than 4000 kilograms, sodium nitrite and now only 200 kilograms, save nearly half. Spraying type anti-rust method through experiment and application in recent years, relevant manufacturer certificate for the cycle, large, batch number, long bearing half scrap is very appropriate. 3. 1 the main reason of corrosion is the following: 1, the local enterprises in the process of consumption bearing no strict according to rust cleaning procedures and oil seal rustproof packaging request of bearing parts in the process of machining and assembly after stop rust bearing waste disposal. Such as ring in the process of turnover turnover time is too long, outer cylindrical contact corrosive liquids or gases, etc. 2, local enterprises in the consumer use of anti-rust, cleaning products such as kerosene quality reach the request of the technology rules. 3, due to a bearing steel price drop down again, forming a bearing steel quality gradually decline. Such as non-metallic impurities content in steel on the high side, The increase of sulfur content in the steel landed the data itself corrosion resistance) Microstructure bias, etc. Is now used in bearing steel consumption enterprise source is miscellaneous, steel quality ichthyosaurs fraud. 4, local enterprise's poor environmental conditions, harmful content is high in the air, flow field is too small, difficult to stop effective antirust treatment. Coupled with the hot weather, consumer workers against the phenomenon such as antirust procedures also exist. 5, some enterprises anti-rust paper, nylon paper ( Bag) And plastic tube bearing etc data don't agree with the request of the rolling bearing oil seal rustproof packaging is one of the main factors to form corrosion. 6, local enterprises bearing ring turning small allowance and allowance of grinding, the oxide coating on the cylindrical, failed to complete decarburization layer removal is one of the reasons. 3. Identify 2 bearing corrosion. Determination of rust pit depth, 1 eye view: see imported bearing surface corrosion condition. With the aid of a magnifying glass (2 5 ~ 10 times) Further examine imported bearing surface corrosion condition. 3 a microscope ( 25 ~ 100 times) Analysis of corrosion products. Find out corrosion reason analysis. 4 generally based on degree of corrosion, rust can be divided into three types: 5 light rust: imported bearing surface loss of metallic luster, dark gray. 6: rust imported bearing surface is yellow, reddish brown, light brown, or have a small amount of rust powder. 7 heavy rust: imported bearing surface in black sheet rust layer or convex rusty spot.