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Surface treatment of screw fasteners-hot-dip galvanizing process

Characteristics of hot-dip galvanized screws

1. Hot-dip galvanized screws have a thicker coating, so they have strong corrosion resistance and can be in contact with any corrosive solution to protect the screws from corrosion. Generally, a thin and dense layer of zinc oxide is formed on the surface of the zinc layer. This substance is hardly soluble in water, so it can protect the screw well. If zinc oxide and other components in the atmosphere form an insoluble zinc salt, the anti-corrosion effect will be more ideal.

2. The coating of hot-dip galvanized screws has good adhesion, can be properly processed, and will not damage the coating, such as cold punching, rolling, wire drawing, bending, welding and painting.

3. Hot-dip galvanized screws have a zinc-iron alloy layer, which can exhibit unique corrosion resistance and compactness in marine salt spray environments and industrial environments.

4. The zinc element of hot-dip galvanized screws has good ductility, and is very strong after being combined with iron elements, so it has strong wear resistance.

5. After hot-dip galvanizing the screw, it is equivalent to one annealing treatment, which can effectively improve the mechanical properties of the screw and eliminate the stress during forming and welding.