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Hot-dip galvanizing, also known as hot-dip galvanizing and hot-dip galvanizing: is an effective metal anti-corrosion method, mainly used in metal structures in various industries. The rust-removed steel is immersed in a zinc solution melted at about 500 ° C to adhere the zinc layer to the surface of the steel member, thereby preventing corrosion. In the past three decades, with the rapid development of cold-rolled strip, the hot-dip galvanizing industry has been developed on a large scale.
Hot-dip galvanizing (steel pipe) production process
Feeding → pickling, washing → solvent → drying → hot galvanizing → inner and outer blowing → rolling label, marking → passivation → inspection → packaging.
Hot-dip galvanizing product advantages
With the development of industry, hot-dip galvanizing products have been applied in many fields. The advantage of hot-dip galvanizing is that the anti-corrosion period is long, and adapting to the environment has always been a popular anti-corrosion treatment method. It is widely used in power towers, communication towers, railways, highway protection, streetlight poles, marine components, building steel structural components, substation ancillary facilities, light industry, etc. The anti-corrosion years of hot-dip galvanizing are long-term, but the years of anti-corrosion are different in different environments: 13 years in heavy industrial areas, 50 years in the ocean, 104 years in the suburbs, and 30 years in the city.
In the suburban environment, the standard hot-dip galvanizing rust thickness can be maintained for more than 50 years without repairing; in urban or offshore areas, the standard hot-dip galvanized rust-proof layer can be maintained for 20 years without having to be repaired;
The galvanized layer and the steel are metallurgically bonded and become part of the steel surface, so the durability of the coating is relatively reliable;
Strong toughness of the coating
The galvanized layer forms a special metallurgical structure that can withstand mechanical damage during shipping and use;
Each part of the plated part can be plated with zinc, which is fully protected even in recesses, sharp corners and hidden places;
save time and energy
The galvanizing process is faster than other coating methods and avoids the time required to apply on the job site after installation;
Simple and convenient inspection
The hot dip galvanized layer can be tested visually and simply on a non-destructive coating thickness gauge;
The specifications for hot dip galvanizing are generally carried out in accordance with BS EN ISO 1461, which limits its extremely low zinc layer thickness, so its rust prevention period and performance are reliable and predictable.
Hot-dip galvanized parts