| 摘要 |
<p>Disclosed is a method for producing a zinc-aluminum-based alloy-coated steel sheet with superior workability and corrosion resistance by coating a base zinc aluminum-based alloy-coated steel sheet in a coating bath comprising 35 to 55% by 5 weight of zinc, 0.5 to 3% by weight of silicon, 0.005 to 1.0% by weight of chromium, 0.01 to 3.0% by weight of magnesium, 0.001 to 0.10% by weight of titanium, and the balance of aluminum and inevitable impurities. With the method, it is possible to produce a zinc-aluminum-based alloy-coated steel sheet which exhibits superior workability through control of an intermetallic 3 compound layer (Zn-Al-Si-Cr) and formation of AlCr 2 due to Cr component present in the coating layer, reduces detachment of the coating layer and cracks of coating occurring during molding, exhibits superior corrosion resistance even after processing and has considerably superior corrosion resistance due to Mg2Si alloy phase and inhibition of oxide film formation.</p> |
