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Pretreatment of the surface to be rust-proof method:
1) Surface cleaning: Cleaning rust must be in accordance with the nature of the surface and the prevailing conditions, select the appropriate method. Commonly used with solvent cleaning, chemical cleaning and mechanical cleaning treatment method.
2) after the surface is dry clean dry compressed air by filtration, or the use of 120 ~ 170 ℃ drier, dry clean gauze can also be used.
The method of applying anti-rust oil
1) Soak France: Some small items using immersion in rust oils, allowed a layer of rust on the surface adhesion grease approach. Antirust film thickness can be controlled by the temperature or viscosity of the oil to achieve.
2) brushing method for NA immersion or spray outdoor construction equipment or special shape products, brush when it is necessary to pay attention not produce accumulation and pay attention coated to prevent leakage.
3) spray some large objects can rust oiled using immersion method, generally about 0.7Mpa pressure filter with compressed air spray cleaner place. Spray application of anti-rust oil or solvent dilution thin rust oil, but must adopt comprehensive fire protection and labor protection measures.
The main factors affecting metal corrosion What?
Metal corrosion by a variety of intrinsic and extrinsic factors that caused summarized in: ① metal chemical composition and structure of the material itself; ② metal surface finish (poor oxygen concentration cell corrosion); ③ the solution in contact with the metal surface composition and pH value; ④ ambient temperature and humidity; ⑤ in contact with the metal surface of the various environmental media.
Why hand sweat can cause metal corrosion?
Human sweat is salty colorless or light yellow transparent liquid weakly acidic, and its pH is 5-6. In addition to containing sodium, potassium, calcium, magnesium, but also contains a small amount of urea, lactic acid, citric acid. When sweat contact with the metal when the metal film formed on the surface layer of sweat, sweat film be caused by electrochemical action metal, corrosion of metal.
People sweat is inevitable, to prevent corrosion caused by hand sweat, production personnel should wear gloves, finger, or pick up parts with a special tool, it should not touch the product.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7906CDB NSK | 30 | 47 | 9 |
| 7906A5DB NSK | 30 | 47 | 9 |