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The Rust Prevention Of Tapered Roller Bearings Is Very Important

Time:2020.05.15  Source:Roller Bearings Suppliers

The Rust Prevention Of Tapered Roller Bearings Is Very Important


Anti-rust management between processes

During the processing, the metal often contacts with atmospheric environments such as dust, moisture and acid mist, and corrosion will occur. After the heat treatment, the residual salt will not be cleaned. Chip dust, hand sweat, etc. are very likely to cause bearing corrosion. Therefore, to ensure that the workpiece will not cause losses during processing, effective rust prevention measures must be taken for the bearing parts that stay in the process.

Establish anti-rust , using mechanical spraying method, spray 2-3 times per shift , 10-15 minutes each time , and concentrate anti-rust treatment on bearing parts.

Regularly clean various anti-rust equipment , strictly prepare anti-rust liquid, cleaning liquid, and cooling water according to the process , regularly test, adjust, and replace on schedule. Bearing parts that need to be inspected and ground must be demagnetized and cleaned with cleaning fluid before entering the warehouse to prevent rust. After pickling or writing acid words, bearing parts must be cleaned, neutralized, and then treated with anti-rust water. , It is forbidden to wash hands and wash cloths with cooling water, cleaning liquid, etc., to ensure the cleanliness and performance of the use liquid, and extend the life of the use liquid. , Do a good job in civilized production, ensure environmental hygiene, and eliminate hidden dangers of corrosion.Need bearing JM511946/JM511910, click here:

WSBC JM511946-JM511910

 

Antirust management of finished bearings

Finished bearings are sealed and packaged after being coated with anti-rust oil, which can avoid the influence of atmospheric environment during storage and transportation, which can cause rust and mildew stains and affect the performance. The finished bearings are washed twice by kerosene mechanical spraying, mechanical spraying anti-rust and lubricating dual-use oil, and polyethylene sealed packaging. Before kerosene spraying and anti-rust lubricating dual-use oil spraying, use filter elements that meet the process requirements to ensure the cleanliness of the finished bearings. The oil tank and machine tool are thoroughly cleaned once a month. When inspectors and assembly personnel touch the finished parts and bearings, liquid gloves should be applied to avoid corrosion due to hand sweat. Handle and store the finished bearing during storage to avoid damage to the packaging. The assembly room and finished bearing storage room should be dry, clean and free of pollution sources.

 

Method of applying anti-rust oil

Immersion method : Some small objects are immersed in anti-rust grease, so that a layer of anti-rust grease is adhered to the surface. The thickness of the oil film can be achieved by controlling the temperature or viscosity of the anti-rust grease.

Brushing method : It is used for outdoor construction equipment or products with special shapes that are not suitable for immersion or spraying. When brushing, it is necessary to pay attention not to build up, but also to prevent missing coating.

Spraying method : Some large anti-rust materials can not be oiled by immersion method. Generally , filtered compressed air with a pressure of about 0.7Mpa is used for spraying in a clean air place. The spray method uses solvent-diluted anti-rust oil or thin-layer anti-rust oil, but must adopt perfect fire prevention and labor protection measures.

 

 

Method for preventing rust of tapered roller bearing

Surface cleaning : Cleaning must select the appropriate method according to the nature of the surface of the anti-rust and the conditions at that time. Commonly used solvent cleaning method, chemical treatment cleaning method and mechanical cleaning method.

Surface drying : After cleaning, it can be dried with filtered dry compressed air, or dried with a dryer at 120 ~ 170 ℃ , or wiped dry with clean gauze.

 

WSBC LM739749-LM739710CD


Method of applying anti-rust oil

Immersion method : Some small objects are immersed in anti-rust grease, so that a layer of anti-rust grease is adhered to the surface. The thickness of the oil film can be achieved by controlling the temperature or viscosity of the anti-rust grease.

Brushing method : It is used for outdoor construction equipment or products with special shapes that are not suitable for immersion or spraying. When brushing, it is necessary to pay attention not to build up, but also to prevent missing coating.

Spraying method : Some large anti-rust materials can not be oiled by immersion method. Generally , filtered compressed air with a pressure of about 0.7Mpa is used for spraying in a clean air place. The spray method is suitable for solvent-diluted anti-rust oil or thin-layer anti-rust oil, but must adopt perfect fire prevention and labor protection measures.

 

What are the main factors affecting metal corrosion?

Metal corrosion is caused by various internal and external factors, which can be summarized as follows:

The chemical composition and structure of the metal material itself ;

The surface finish of the metal (corrosion of the battery with poor oxygen concentration);

Solution composition and pH value in contact with the metal surface ;

Ambient temperature and humidity;

Various environmental media in contact with metal surfaces.

 

Why does hand sweat cause metal corrosion?

Human sweat is a colorless transparent or lightly acidic liquid with a salty taste, and its pH is 5 ~ 6 . In addition to sodium, potassium, calcium, and magnesium salts, it also contains a small amount of organic acids such as urea, lactic acid, and citric acid. When sweat contacts metal, a sweat film will form on the surface of the metal, and the sweat film will cause electrochemical action on the metal and corrode the metal.

Sweating is unavoidable. To prevent rust caused by hand sweats, production personnel should wear gloves, finger cots, or use special tools to take parts.


 

It should be noted that the following acid solutions cannot be used for bearing rust removal: sulfuric acid, hydrochloric acid, dilute sulfuric acid, dilute hydrochloric acid. Because these acids will destroy the good metal parts, these kinds of liquids can never be used! There are several liquids in daily life that can remove rust without harming good metal parts, but the effect is different. The first is dilute oxalic acid, the ratio of water to water is 3 : 1 , dilute oxalic acid is slower, but the effect is very good Well, they are sold everywhere. The second type is gun oil, also called mechanical derusting oil, which is not very easy to buy. This kind of oil can quickly derust, and the effect is very good.


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