The thickness of the zinc coating is generally 5~15 microns. The thickness of the zinc coating on the hot dip galvanized pin is generally more than 35 microns, or even 200 microns. It has good coverage, tight texture, and no organic inclusions. As we all know, the atmospheric corrosion resistance mechanism of zinc includes mechanical protection and electrochemical protection. Under atmospheric corrosion conditions, there is a protective film on the surface of the zinc layer, which slows down the corrosion of zinc to a certain extent. If the protective film (also called white rust) is damaged, a new protective film will be formed. When the zinc layer is seriously damaged and the iron matrix is threatened, zinc will have an electrochemical protection effect on the matrix. The standard potentials of zinc and iron are - 0, 76V and - 0, 44V respectively. When zinc and iron form micropores, zinc is dissolved as anode and iron is protected as cathode. Obviously, the corrosion resistance of hot-dip galvanized pin to base metal iron is better than that of galvanized bolt. We may often hear that fasteners, such as bolts and bolts, should be hot-dip galvanized. Hot galvanizing is a metal surface treatment technology, which mainly improves the corrosion resistance of metal surface. Therefore, in order to improve the service performance of fasteners, many manufacturers will carry out hot-dip galvanizing technology.

What are the advantages of hot dip galvanizing pin process?

(1) Hot dip galvanized pin is durable after hot dip galvanizing

In suburban environment, the standard rust proof thickness of hot-dip galvanizing can be maintained for more than 50 years without repair; In urban areas or offshore areas, the standard hot-dip galvanized antirust coating can be kept for 20 years without repair;

Low cost of hot galvanizing pin: the cost of hot galvanizing rust prevention is lower than that of other paint coatings;

The hot galvanized pin has good reliability: the galvanized layer is metallurgical combined with the steel, becoming a part of the steel surface, and the coating is durable and reliable;

(2) Strong coating toughness:

The zinc coating forms a special metallurgical structure, which can withstand mechanical damage during transportation and use;

Comprehensive protection: every part of the pin can be galvanized, and even the concave, sharp corners and hidden places can be fully protected, which improves the performance of the pin.

Good reliability: the zinc coating is combined with the steel metallurgy to become a part of the steel surface, and the coating is durable and reliable;

(3) Low processing cost: the rust prevention cost of hot-dip galvanized pin is lower than that of other coatings;

Time and labor saving: the galvanizing process is faster than other painting construction methods, which can avoid the time required for painting on the construction site after installation;

Coating toughness: the zinc coating forms a special metallurgical structure, which can withstand mechanical damage during transportation and use.