TIN-ALUMINUM ALLOY COATED STEEL SHEET WITH AN EXCELLENT CORROSION RESISTANCE AND WELDABILITY

摘要

Sn-Al alloy is plated on the surface of steel sheet by vapor deposition method in a vacuum chamber. The plated layer includes 30-90 wt.% Sn, and has 0.3-3 micron thickness. Then the upper part of the plated layer consists mainly of Sn element with a lower content of Al element, but the lower interfacial part between the plated layer and the steel sheet consists mainly of Al element with a lower content of Sn element. The Sn-Al plated steel sheet has excellent weldability and corrosion resistance.