Hot dip galvanizing for flange

Hot dip galvanizing is an effective way of metal anticorrosion. Flanges hot dip galvanizing refers to the production of flange molding, after rust immersed in the molten zinc at about 500 degrees Celsius, so that the surface of the flange steel member is attached to zinc layer, so as to achieve a good anti-corrosion purpose of the flange.

1.Process flow

Finished product pickling – washing – bath – drying – hanging – plating – cooling – medicine – cleaning – grinding – hot dip galvanizing completed

Hot dip galvanizing for flange

Hot dip galvanizing for flange


Iron cleaning, and then solvent treatment, after drying immersed in zinc liquid, iron and molten zinc reaction to generate an alloyed zinc layer, its process is: degreasing – water washing – pickling – plating – drying – hot dip galvanizing – separation – cooling passivation.

The thickness of the alloy layer of hot galvanized mainly depends on the chemical composition of the silicon content of the steel, the size of the cross-sectional area of the steel, the roughness of the steel surface, the temperature of the zinc pot, the dipping time, the cooling speed, the cold rolling deformation and so on.

3.The advantages of hot dip galvanized flange

The cost of hot dip galvanizing antirust is lower than the cost of other paint coatings; In the suburban environment, with standard hot-dip galvanizing anti-rust thickness, can be maintained for more than 50 years, even in the offshore or corrosion prone areas, can also be maintained for 20 years, anti-corrosion effect is good, durable; Galvanized layer and flange material is metallurgical, become a part of the steel surface, so the durability of the flange coating is more reliable; Galvanized layer forms a special metallurgical structure, this structure can withstand mechanical damage in transportation and use, strong toughness; Each part of the plating can be zinc plated, even in the pits, sharp corners and hidden places can be fully protected; In the construction process of the coating, the galvanizing process is faster than other methods, and can avoid the time required to brush on the site after installation, more time and effort saving.

Haihao Group has been specialized in the supply of flanges for nearly 40 years, and has mastered the galvanized technology and skills in hot-dip galvanized flanges, providing customers with high quality, corrosion resistant and various types of hot-dip galvanized flanges. Looking forward to new and old customers to buy, technical exchanges and problems consultation!