Hot-dipped Al-Mg-Si Coating Steel - Its Structure, Electrochemical and Mechanical Properties -
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Hot-dipped Al-Mg-Si coatings to alternate Zn and Zn alloy coatings for steel were examined on metallographic structure, corrosion resistance, sacrificial ability, formation and growth of inter-metallic compounds, and mechanical properties. Near the eutectic composition of quasi-binary system of Al-Mg2Si, very fine eutectic structure of α-Al and Mg2Si was obtained and it showed excellent corrosion resistivity and sacrificial ability for a steel in sodium chloride solutions. Formation and growth of Al-Fe inter-metallic compounds at the interface of substrate steel and coated layer was suppressed by addition of Si. The inter-metallic compounds layer was usually brittle, however, the coating layer did not peel off as long as the thickness of the inter-metallic compounds layer was small enough. During sacrificial protection of a steel, amount of hydrogen into the steel was more than ten times smaller than that of Zn coated steel, suggesting to prevent hydrogen embrittlement. Al-Mg-Si coating is expected to apply for several kinds of high strength steels.
Abstract
Hot-dipped Al-Mg-Si coatings to alternate Zn and Zn alloy coatings for steel were examined on metallographic structure, corrosion resistance, sacrificial ability, formation and growth of inter-metallic compounds, and mechanical properties. Near the eutectic composition of quasi-binary system of Al-Mg2Si, very fine eutectic structure of α-Al and Mg2Si was obtained and it showed excellent corrosion resistivity and sacrificial ability for a steel in sodium chloride solutions. Formation and growth of Al-Fe inter-metallic compounds at the interface of substrate steel and coated layer was suppressed by addition of Si. The inter-metallic compounds layer was usually brittle, however, the coating layer did not peel off as long as the thickness of the inter-metallic compounds layer was small enough. During sacrificial protection of a steel, amount of hydrogen into the steel was more than ten times smaller than that of Zn coated steel, suggesting to prevent hydrogen embrittlement. Al-Mg-Si coating is expected to apply for several kinds of high strength steels.
참고문헌 (7)
- T.Tsuru, , Kinzoku, 78, pp.14~ (2008)
- Y.Kyo, , Proceedings of JSCE Materials and Environment Omiya, pp.273~ (2008)
- M.Enokida, "Abtracts of U.S.A.- Japan Joint Meeting on Electrochemistry", Abstract 1265, The Electrochemical Society Hawaii, ~ (2008)
- Y.Kyo, , Proceedings of Fall Meeting of Electrochemical Society of Japan, pp.297~ (2009)
- H.Kawabata, , Proceedings of Fall Meeting of Japan Institute of Metal, pp.234~ (2009)
- T.Tsuru, , Proceedings of 154th Iron and Steel Institute of Japan, pp.941~ (2009), CAMP-ISIJ