How to prevent needle roller bearings from rusting

Before we introduce the anti-rust method of needle roller bearings, we should first understand what causes the bearing to rust. What are the main factors that affect corrosion of needle roller bearings? Then prescribe the right medicine
The corrosion of needle roller bearings is caused by various internal and external factors, which can be summarized as follows:
(1) The material of the needle roller bearing itself is made of bearing steel, and the chemical composition and structure of the bearing steel itself may be oxidized by air into embroidery.

(2) The surface finish of the needle roller bearing (battery corrosion with poor oxygen concentration);

(3) The composition and pH of the solution in contact with the surface of the bearing;

(4) The ambient temperature and humidity of the stored bearings;

(5) Various environmental media in contact with the bearing surface.
So what is the method of anti-rust of ring needle roller bearings?
1. First of all, the bearing surface cleaning: the cleaning must be based on the nature of the surface of the rust and the conditions at that time, and the appropriate method must be selected. Generally, it is more washed with solvents, chemical treatment cleaning method and mechanical cleaning method.

2. The surface of the bearing can be dried and cleaned with filtered dry compressed air, or dried with a dryer of 120 to 170 degrees Celsius, or dried with clean gauze.

Method of applying anti-rust oil to the surface of the bearing:

3. Soaking method: Needle roller bearings are soaked in anti-rust grease and let their surface adhere to a layer of anti-rust grease. The thickness of the oil film can be achieved by controlling the temperature or viscosity of the anti-rust grease.

4. There is also human hand sweat will cause rust of needle roller bearings, human sweat is a colorless transparent or light yellow with a salty taste of weak acidity of the liquid, its pH value of 5 ~ 6. In addition to containing sodium, potassium, calcium, magnesium salts, it also contains a small amount of organic acids such as urea, lactic acid, and citric acid. When sweat comes into contact with the bearing surface, a sweat film is formed on the bearing surface, which causes electrochemical effects on the bearing, corrodes the bearing, and thus produces embroidery. People sweating is inevitable, to prevent hand sweat caused by rust, that is, production personnel in the assembly of bearings should wear gloves, finger sleeves, or use special tools to take the bearing, do not casually touch the surface of the bearing with their hands.

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