| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of producing a uniform Zn-Al-Mg based alloy plated steel which has a high coating weight and high corrosion resistance by a flux method. SOLUTION: In the method of producing a Zn-Al-Mg based alloy plated steel, an oxide film on the surface of a steel is removed by mechanical descaling, thereafter, flux treatment is performed, and the steel is dipped into a Zn-Al-Mg based alloy plating bath heated at a bath temperature of 420 to 550°C and comprising, by mass, 0.1 to 5% Al and 0.1 to 5% Mg, and the balance Zn with inevitable impurities, so that a Zn-Al-Mg based plating layer is formed on the surface of the steel in a high coating weight. COPYRIGHT: (C)2004,JPO&NCIPI
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