The galvanized layer of galvanized wire is formed by zinc in a high-temperature liquid state in three steps:
The surface of the galvanized wire base is dissolved by the zinc solution to form a zinc-iron alloy phase layer;
The zinc ions in the alloy layer further diffuse to the substrate to form a zinc-iron mutual solubility layer;
The surface of the alloy layer is covered with a zinc layer.
Performance characteristics of hot-dip galvanized wire:
Hot-dip galvanized wire has a thicker dense layer of pure zinc covering the steel surface, which can prevent the steel substrate from contacting any corrosive solution and protect the steel substrate from corrosion. In the general atmosphere, a thin and dense layer of zinc oxide is formed on the surface of the zinc layer, which is difficult to dissolve in water, so it plays a certain role in protecting the steel matrix. If zinc oxide and other components in the atmosphere form insoluble zinc salts, the anti-corrosion effect is more ideal.
It has an iron-zinc alloy layer, which is densely combined, and exhibits unique corrosion resistance in marine salt fog atmospheres and industrial atmospheres;
Due to the firm combination, zinc-iron is soluble in each other, and has strong wear resistance;
Due to the good ductility of zinc, its alloy layer is firmly attached to the steel base, so the hot-dip parts can be cold punched, rolled, drawn, bent, etc. without damaging the coating;
After hot-dip galvanizing, it is equivalent to one-time annealing treatment, which can effectively improve the mechanical properties of the steel matrix, eliminate the stress of steel parts during forming and welding, and facilitate turning of steel structural parts.
The surface of hot-dip galvanized wire is bright and beautiful.
The pure zinc layer is the most plastic galvanized layer in hot-dip galvanizing. Its properties are basically close to pure zinc, and it has ductility, so it is flexible.