Zn-5%Al-RE合金(Galfan)镀层钢丝的开发应用

Zn - 5 %Al-RE合金镀层既有铝元素把钢基与环境分隔的屏障保护作用 ,又有锌元素优异的电化学防护性能 ,在各种大气中的抗蚀能力是同厚度热镀锌层的 2～ 3倍 ,其加工成型性、涂挂性优于热镀锌层。这种合金的熔点只有 382℃ ,比锌的熔点低 37 5℃ ,热镀温度在 42 0～ 45 0℃之间。因此较钢丝的热镀锌能耗低 ,且可保持有镀锌钢丝同样的力学性能 ,从而是取代镀锌钢丝及其制品的理想产品。本文介绍这种镀层钢丝的合金成分、显微组织、热浸镀工艺和装备、耐腐蚀机理和国内开发应用状况

Development and Application of Zn-5%Al-RE Alloy Coated Steel Wire

Al in Zn-5%Al-RE alloy (Galfan) coat has protective screen funciton of separating steel base from environment,and Zn in it has excellent electrochemic protective funciton The anticorrosive capacity of the coat in every atmosphere is two to three times as that of the same thickness coat galvanized by dipping,the machine-shaping and coating properties of which are superior to that of the coat galvanized by dipping The melting point of the alloy is only 382?℃,which is 37 5?℃ lower than that of Zn The temperature of galvanizing by dipping is 420～450?℃,so the energy consumption of Galfan coating is lower than that of steel wire galvanizing by dipping The mechanical property of the coat is the same as that of galvanized steel wire,so Galfan coated steel wire is an ideal product substituting galvanized steel wire and its products The alloy composition,microstructure,technology and equipment of galvanizing by dipping, mechanism of anticorrosion,development and application state of Galfan coated steel wire at home are introduced