HOT-DIP ZINC-ALUMINUM ALLOY COATED ARTICLE EXCELLENT IN FATIGUE CHARACTERISTIC

摘要

PURPOSE: To provide a hot-dip zinc-aluminum alloy coated article capable of remarkably improving the fatigue characteristics of a hot-dip zinc-aluminum alloy coated article having high corrosion resistance and attractive external appearance and containing trace amounts of sodium while maintaining the high corrosion resistance and external appearance which are the advantages of the above article. ;CONSTITUTION: In hot-dip zinc-aluminum alloy coating having a composition consisting of, by weight, 0.1-30% aluminum, 0.005-0.10% sodium, and the balance zinc other than impurities, the thickness of an intermetallic compound layer forming in the interface between a Zn-Al layer and a steel material as a substrate is regulated to 30μm and also the roughness of the plating surface is regulated to 30μm by maximum height (Rmax).;COPYRIGHT: (C)1993,JPO&Japio