- Anti-corrosion measures
1. Anti-corrosion coating inside and outside
During the production process, coating the inner and outer surfaces with corrosion-resistant coatings is the most commonly used anti-corrosion measure. The inner coating material is mainly epoxy resin, which can prevent the corrosion of steel by the medium in the pipe. The outer coating material is mainly polyurethane, which can prevent steel pipes from corroding in environments such as high temperature, humidity, acid and alkali.
2. Hot dip galvanizing
Hot-dip galvanizing is a commonly used anti-corrosion measure for hot-dip coatings. Coating a layer of zinc on the surface of steel pipes can effectively resist the erosion of most corrosion factors. This method requires that the surface of the steel pipe be clean and free of any impurities such as grease, rust, etc. The anti-corrosion effect of hot-dip galvanizing is long-lasting and can generally be used for more than 10 years.
3. Spray anti-corrosion paint
Spraying anti-corrosion paint is a method of external surface anti-corrosion. Coating a layer of paint on the outer surface of the steel pipe can effectively resist corrosion factors in the external environment. This method requires attention. The choice of coating and the thickness of the coating directly affect the anti-corrosion effect of the steel pipe.
- Corrosion resistance
Different anti-corrosion measures will affect the corrosion resistance of steel pipes. Generally speaking, hot-dip galvanizing has higher corrosion resistance than internal and external coatings. Because hot-dip galvanizing is to plate zinc on the surface of the steel pipe, it forms a protective layer that is not easy to damage. The internal and external coatings are easily eroded by factors such as acid, alkali and high temperature in the external environment, resulting in gradual damage to the steel pipe.
