Do you know the surface treatment of screws

As one of the important fasteners, screws generally use different surface treatment processes to meet customer requirements.

1.Zinc plating.

Galvanizing can be divided into cold galvanizing, mechanical galvanizing and hot-dip galvanizing, of which hot-dip galvanizing is the most popular.

Advantages: strong corrosion resistance; better adhesion and hardness of the galvanized layer; large amount of zinc, and the thickness of the zinc layer is dozens of times that of cold galvanized; cheaper and more environmentally friendly.

2.Dacromet is a new type of anti-corrosion coating, which is the best process to replace traditional electro-galvanizing and hot-dip galvanizing.

Advantages: Superior corrosion resistance: The anti-rust effect is 7-10 times that of traditional galvanizing; high heat resistance, the heat resistance temperature can reach more than 300 ℃; good adhesion and recoating performance; no waste water is generated during production and exhaust gas.