High-corrosion-resistance Zn90-Al10-Mg alloy coating wire for bridge cable

Abstract

The invention relates to a high-corrosion-resistance Zn90-Al10-Mg alloy coating wire for a bridge cable. In the coating, the aluminum ranges from 9 to 14.0 wt%, the magnesium ranges from 0.1 to 0.3 wt%, the coating surface grain diameter ranges from 40 nm to 50 nm, and eight circles are wound on a core bar with the diameter five times that of the wire, the coating is free of cracking, in the saltmist environment, the anti-corrosion property is three to six times that of a pure zinc coating, and under the ocean environment, the service reaches above 60 years. According to the achieving methodof the coating, synchronous take up and pay off are adopted, the wire is subjected to plating assistance and is immersed in a pure zinc coating pot with the temperature of 440 to 460 DEG C, a pure zinc coating and a zinc and iron alloy layer are generated, most of pure zinc is removed, a zinc iron alloy layer is reserved, then, the wire enters a zinc alloy magnesium alloy hot dip pot with the temperature of 450 to 470 DEG C, the pot temperature is higher than the pure zinc melting point of 417 DEG C, the previous pure zinc layer is melted, the zinc-iron alloy absorbs the aluminum and magnesiumand is converted into the zinc-iron-aluminum-magnesium coating with the good flexibility, and a zinc-iron-aluminum-magnesium multicomponent alloy coating middle layer and a surface zinc-iron-aluminum-magnesium alloy coating are included.

Description

Technical field [0001] The invention relates to a high corrosion resistance Zn90-Al10-Mg alloy coated steel wire product for bridge cables and a realization process of the steel wire coating, in particular to a process for hot-dip galvanizing aluminum-magnesium alloy coating on the surface of the steel wire Background technique [0002] Bridge structures play a vital role in national production and life. In particular, large-scale bridge structures are often the transportation hub of a country and region, shouldering important responsibilities for the national economy and the people's livelihood. With the development of economy and society, it is a very important issue to ensure the safety and reliability of many major bridge structures during service. During the service period of 20 to 30 years, the load on the bridge structure, along with the erosion of the bridge structure by the external environment and the aging of the bridge structure component materials, coupled to the bri...

AI Technical Summary

Problems solved by technology

With the improvement of requirements for the corrosion resistance of coated steel wire and the expansion of the application field of coated steel wire, the types of coated steel wire are also increasing. Zn95Al5 developed in recent years is an upgraded product of metal pure zinc coating, and its corrosion resistance is higher than that of pure 1 to 2 times zinc, but even this product cannot fully meet the durability requirements of bridge cables