Anti-corrosion measures and surface treatment of Q235 square tube

The anti-corrosion measures and surface treatment of Q235 square tube usually include the following methods:

1. Galvanizing: Dip the Q235 square tube into molten zinc to form a layer of zinc covering the surface of the steel pipe to provide anti-corrosion protection. Galvanizing can be done by hot dip galvanizing or electric galvanizing.

2. Thermal spraying: Spray the melted metal (such as zinc, aluminum, etc.) to the surface of the Q235 square tube using the spray gun to form a sealed anti-corrosion layer to provide corrosion resistance.

3. Coating: The surface of Q235 square tube is coated with special anti-corrosion coating to form a protective layer to block the erosion of external corrosion factors on the steel pipe.

4. Cold galvanizing: Chemical galvanizing method is used to form a thin zinc covering layer on the surface of Q235 square tube to provide basic anti-corrosion protection.

5. Sandblasting treatment: Through high-speed spraying of sand or other granular materials, the oxides and dirt on the surface of the Q235 square tube are removed, making the surface clean and providing good adhesion for subsequent coating or anti-corrosion treatment.

6. Phosphating: The Q235 square tube is immersed in a solution containing phosphorus compounds for treatment to generate a phosphating layer on the surface of the steel pipe to provide a certain anti-rust effect and lubrication performance.

It is necessary to choose appropriate anti-corrosion measures and surface treatment methods according to the specific use environment and requirements. In practical applications, a combination of methods may be used to improve the corrosion resistance and service life of Q235 square tube.