1. Electroplating: immerse the derusted steel parts in molten zinc to attach a layer of zinc layer to the surface of the steel parts. It is characterized by high thermal efficiency, stable coating quality, bright color, good corrosion resistance, fast production speed and other advantages.
2. Hot-dip galvanizing: It is to put the steel parts into the molten zinc liquid, and form a layer of zinc-iron alloy on the surface of the steel parts through physical and chemical reactions. Hot-dip galvanizing is characterized by good corrosion resistance and wear resistance, while the color is relatively uniform and the finish is high.
3. Coating: Use paint to coat the surface of the treated steel to achieve the purpose of anti-corrosion and anti-oxidation. The coating process is divided into spray painting, painting painting, baking paint and other methods. The advantages of painting are low cost, simple operation and remarkable effect.
4. Cold galvanizing: It is to treat the surface of steel parts with zinc powder or zinc salt solution at room temperature to form a thin and uniform zinc layer. Cold galvanization is characterized by low equipment investment and low cost, but weak corrosion resistance.
Overall, electroplating and hot-dip galvanizing are suitable for steels that need to be exposed to harsh environments for a long time;Painting is suitable for situations that require strong decoration and low cost;Cold galvanizing, on the other hand, is suitable for some short-term use of steel. Which method to choose depends on the specific application needs and conditions.