PROBLEM TO BE SOLVED: To provide a plated steel wire having excellent corrosion resistance under saltwater environment and freshwater environment and its manufacturing method. ;SOLUTION: In the hot-dip Al-Mg-Si alloy coated steel wire, a hot-dip Al-Mg- Si alloy coating layer having a composition consisting of, by mass, 3-9% Mg, 2-10% Si and the balance Al with inevitable impurities is formed on the surface of a steel wire. Coating weight is (10 to 400) g/m2 expressed in terms of Al, and Mg2Si is contained in the plating layer. Further, an Al-Si-Fe alloy layer of 15 m thickness is formed at the interface between the plating layer and the steel wire. It is preferable that the steel wire has, as an upper layer, a baking-hardening-type organic synthetic resin coated film of 80% degree of curing. In the plating method, pretreatment is performed, at the above alloy plating, by using an aqueous flux where KCl and NaCl are contained as main components and at least one kind of fluoride among Na3AlF6, AlF3, NaF and KF is added.;COPYRIGHT: (C)2001,JPO
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机译：解决的问题：提供在盐水环境和淡水环境下具有优异的耐腐蚀性的镀覆钢丝及其制造方法。 ;解决方案：在热浸Al-Mg-Si合金涂层的钢丝中，热浸Al-Mg-Si合金涂层的成分为3-9％Mg，2-10％Si在钢丝表面上形成具有不可避免的杂质的余量Al。镀层重量以Al表示为（10〜400）g / m 2，镀层中含有Mg 2 Si。此外，在镀层与钢丝之间的界面处形成厚度为15m的Al-Si-Fe合金层。钢丝优选具有80％的固化度的烘烤硬化型有机合成树脂涂膜作为上层。在镀覆方法中，在上述合金镀覆中，通过使用以KCl和NaCl为主要成分并添加Na3AlF6，AlF3，NaF和KF中的至少一种氟化物的水熔剂进行预处理。日本特许厅（C）2001
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