Investigation of Corrosion Resistant of Al-Zn-Si-Re-Mg Coating

A dense hot-dipping Al-Zn-Si-Re-Mg coating was prepared on the surface of steel sheet. The microstructure and toughness of coating were investigated by SEM and Nano-indentation test. The polarization curve of coating was acquired in static 3.5 wt.% NaCl solution in air at 25°C. The results show that...

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Veröffentlicht in:	Advanced Materials Research 2013-01, Vol.652-654, p.1775-1779
Hauptverfasser:	Yin, Guo Xian, Miao, Qiang, Wei, Dong Bo, Zhang, Ping Ze, Wei, Xiao Xin, Huang, Jun, Yao, Zheng Jun, Ying, Feng
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum Coating Corrosion resistance Porosity Protective coatings Sheet metal Steels Toughness
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Zusammenfassung:	A dense hot-dipping Al-Zn-Si-Re-Mg coating was prepared on the surface of steel sheet. The microstructure and toughness of coating were investigated by SEM and Nano-indentation test. The polarization curve of coating was acquired in static 3.5 wt.% NaCl solution in air at 25°C. The results show that Re and Mg improve the corrosion resistance and toughness of Al-Zn-Si coating. The formation of passive film on surface of Al-Zn-Si-Re-Mg coating is easier than that of Al-Zn-Si coating. Re decreases the number of oxygen existed in the coating. Mg3Al2(SiO4)3 depresses the porosity of coating, which is a glassy compound and formed in hot-dipping process.
ISSN:	1022-6680 1662-8985 1662-8985
DOI:	10.4028/www.scientific.net/AMR.652-654.1775