Rust was surface pretreatment methods:
1) Surface cleaning: The cleaning must be in accordance with the nature and condition of the surface of antirust, selected the appropriate method. Commonly used solvent cleaning method, chemical processing, cleaning and mechanical cleaning method.
2) The surface is dry cleaning available filters clean dry compressed air drying, or drying with a dryer of 120 ~ 170 ℃, also can be dry clean gauze.
Coated with anti-rust oil
1) soak method: some small items soaked in rust oil, allowed to surface adhesion layer of rust grease. The film thickness can control the temperature or viscosity of the anti-rust grease to achieve.
2) brushing method for NA outdoor soaking or spraying construction equipment or special shape products, it is necessary to pay attention to when brushing does not produce accumulation, we should pay attention coated to prevent leakage.
3) of large-scale anti-rust spray method can not be used soak method oiled, general use about 0.7Mpa pressure filtered compressed air in place of the air cleaning spray. Spray method applies the solvent dilution rust oil or a thin layer of anti-rust oil, but it must be used to improve the fire safety and labor protection measures.
What are the main factors affecting the corrosion of metals?
Metal corrosion is caused by a variety of internal and external factors, can be summarized in: 1 metal material itself, the chemical composition and structure; ② metal surface finish (oxygen concentration cell corrosion); ③ with the metal surface contact solution the composition and pH value; ④ ambient temperature and humidity; ⑤ with the metal surfaces in contact with various environmental media.
Why the hand sweat will cause metal corrosion?
Human sweat is a transparent colorless or light yellow salty weakly acidic liquid, its pH value is 5 to 6. Addition contains sodium, potassium, calcium, magnesium salts, and further contains a small amount of urea, lactic acid, citric acid and other organic acids. When sweat is in contact with the metal, the metal surface to form a layer of sweat film sweat film interested metal caused by the electrochemical action, metal corrosion.
Sweating is inevitable, to prevent corrosion caused by hand sweat, production personnel should wear gloves, finger cots, or pick up the parts with a special tool, and it should not touch the product.



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