Screw knowledge
Sep 15, 2023| In general, the rust-proof surface treatment of bolts has the following methods:
1. Passivation treatment
It is in the process of passivation will dissolve the iron pollutants hidden in the screw, so that the surface of the screw opened into a layer of passivation protective film, can protect the bolt is not easy to be eroded, the general passivation surface treatment method is applied to electronic products.
2, galvanized/galvanized
Plating or galvanizing on the surface of bolts can enhance the corrosion resistance of bolts, but different types of electroplating can produce different corrosion resistance. If you need to know how resistant it is, you can test its corrosion resistance by salt spray test.
3, plated alloy/zinc iron alloy
Le alloy plating
Bolt parts of Zinc-iron alloy are generally bolt fasteners with high requirements for rust resistance. Generally, bolts with the surface treatment of Zinc-iron alloy/Zinc-iron alloy can pass up to 1,000 hours of salt spray test.
4, electrophoresis
Electrophoretic surface treatment
It uses electrophoretic technology to evenly cover the surface of bolt fasteners with particles such as paint, latex and rubber. After surface treatment by electrophoresis, the coating on bolt surface is plump, uniform, smooth and smooth.
5, spray paint
Use the spray gun to spray a thin layer of color evenly on the bolt fasteners, the bolts into more different colors, mainly used to beautify the appearance of bolts. Spray paint is also mainly used in the electronics industry.
Bolt processing customized surface treatment method according to customer needs to choose the appropriate surface treatment. Precision bolt production and manufacturing process requirements are more accurate, in the tolerance requirements, size requirements and other aspects are very high. Bolt processing and customization manufacturers specializing in the production of customized various special-shaped bolt fasteners, high-end and difficult bolt customized production, exquisite technology, excellent quality, special inspection, to ensure that the qualified rate of each bolt factory reaches 100%.
Of course, the bolt surface black blue and even apply rust oil is also a simple and economical way to prevent rust!