We know that many metals are easy to rust, especially iron, rust corrosion will cause material waste. Then learn how to prevent rust is very important, the following look at my introduction to the rust treatment.
Rust treatment
The first: that is the direct use of antirust oil to prevent rust, which is also known as the oil film rust, and is called physical rust.
The second: that is the so-called chemical rust prevention method, that is, now is often used by the customer stainless steel passivation rust prevention, the antirust agent is a kind of metal rust prevention, and is called chemical passivation antirust method, he is completely different from the principle of physical rust prevention. Physical antirust principle is to make the stainless steel surface isolated from the air so as not to be oxidized, and stainless steel passivation he is only stainless steel passivation solution in contact with the surface of the workpiece so as to produce a chemical reaction, the stainless steel chromium-poor layer itself into a chromium-rich layer so as to make the workpiece to achieve a high salt spray rust effect, compared to the traditional anti-rust oil rust to be dozens of times stronger, and the surface is clean and fresh.
1, surface pretreatment;
2, plating;
3, thermal spraying;
4, hot dip plating;
5, surface conversion modification technology;
6, surface diffusion infiltration technology
7, corrosion inhibitors (VCI vapor-phase corrosion inhibitor)
8, the use of rust preventive oils, 9, use of passivation Liquid
10-immersed in a higher concentration of rice water
11. Baking blue, baking enamel
12. Plating other metals (Zn, Al)
Rust removal treatment methods
1) Surface Cleaning: Cleaning must be in accordance with the nature of the surface of the rust-proof object and the conditions at the time, the selection of the appropriate method. Generally used solvent cleaning method, chemical treatment cleaning method and mechanical cleaning method.
2) surface drying after cleaning can be filtered dry compressed air blow-dry, or 120 ~ 170 ℃ dryer for drying, can also be used to clean gauze dry.
Apply anti-rust oil method:
1) immersion method: some small items are used to soak in anti-rust grease, so that its surface adheres to a layer of anti-rust grease method. The thickness of the film can be achieved by controlling the temperature or viscosity of the antirust grease.
2) Brushing method is used for outdoor construction equipment or special shaped products that are not suitable for immersion or spraying, and attention should be paid to not produce buildup as well as preventing leakage when brushing.
3) Spray method, some large-scale antirust products can not be coated with oil by immersion method, and generally use filtered compressed air at a pressure of about 0.7Mpa in the air clean place for spraying. Spray method applies solvent dilution type rust preventive oil or thin layer of rust preventive oil, but must use perfect fire prevention and labor protection measures.
I believe that after the introduction of the above rust treatment,
we all understand how to prevent rust. For more information, please pay attention to the protection network.