Hot galvanizing furnace hearth composite alloy and implementation process

Abstract

The invention provides hot galvanizing furnace hearth composite alloy and an implementation process. The hot galvanizing furnace hearth composite alloy comprises, by weight, 96.9%-99.85% of zinc, 0.08%-1.0% of aluminum, 0-0.14% of nickel, 0-1.0% of manganese, 0-0.12% of silicon, 0-2.0% of magnesium, 0-0.5% of rare earth lanthanum and 0-1.0% of rare earth cerium. The implementation process includes the steps of burdening, smelting, plating part treatment, hot galvanizing and the like. According to the hot galvanizing furnace hearth composite alloy, the materials have excellent corrosion resistance and comprehensive mechanical property, the structure and performance are stable, and the quality can be guaranteed to meet the requirements for current national standard; the preparation method is simple, the cost can be effectively controlled, and the market prospect is good.

Description

technical field [0001] The invention relates to the field of anti-corrosion technology in the iron and steel industry, in particular to a method of hot-dip galvanizing molten pool composite alloy and its implementation process. Background technique [0002] Hot-dip galvanizing originated in the middle of the 18th century. It is currently the most widely used and cost-effective steel surface treatment method. Its principle is to use the standard electrode potential of zinc to be negative to that of iron. The zinc layer thus realizes the function of protecting the steel base, thereby greatly prolonging the service life of the steel. Compared with other metal anti-corrosion methods, the hot-dip galvanizing process is more important in the electrochemical protection of the coating, the compactness of the coating, the durability of the coating, the maintenance-free property of the coating, the bonding force between the coating and the substrate, the economy of the coating, and th...

AI Technical Summary

Problems solved by technology

The zinc content in these zinc slag and zinc ash is as high as 90%-95%, and the zinc consumed accounts for about 20%-35% of the total zinc, which will cause many effects such as shortening the life of the zinc pot and affecting the quality of the galvanized layer.

In addition, my country's alloying technology is relatively weak, and the current hot-dip galvanizing alloy process in China is very simple. The traditional hot-dip galvanizing process suffers from low production efficiency, uneven alloy composition, high yield of zinc dross and zinc ash, and poor quality of plated parts. Does not meet the national standards and other issues

With the development of steel materials and the higher and more stringent requirements for the corrosion resistance of the coating, the traditional hot-dip galvanizing technology has been unable to obtain a coating that meets the requirements.