PITTING CORROSION BEHAVIOR OF Al-Zn-In-SI ALLOYS IN NaCl SOLUTIONS

J Chin Soc Corr Pro

1996, Vol. 16

Issue (3): 230-234 DOI:

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PITTING CORROSION BEHAVIOR OF Al-Zn-In-SI ALLOYS IN NaCl SOLUTIONS

ZHAN Guangshen; MOU Zhanqi (Dalian University of technology)

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Abstract The pitting potentials Eb of Al-Zn-In-Si and Al-Zn-In-Si-Mg alloys were measured in NaCl solutions.Influence of chloride ion concentration and temperature on pitting corrosion susceptibility was examined.Results showed that with the increase in Cl- concentration and temperature, the Eb decreased and pitting corrosion became more severe. From the standpiont of pitting corrosion, Al-Zn-In-Si-Mg alloy used for sacrificial anode was superior to Al-Zn-In-Si alloy. The corrosion morphology and EPA line scan analysis showed that the content of indium and silicon at pit bottom was much higher than the average content in alloy and that pitting corrosion mainly occurred around in and St-rich "islands".

Key words: Aluminium alloy Pitting corrosion Chloride ion

Received: 25 June 1996

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Cite this article:

ZHAN Guangshen; MOU Zhanqi (Dalian University of technology). PITTING CORROSION BEHAVIOR OF Al-Zn-In-SI ALLOYS IN NaCl SOLUTIONS. J Chin Soc Corr Pro, 1996, 16(3): 230-234.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1996/V16/I3/230

1FoleyRTCorrosion,1986,42:2772曹楚南．腐蚀用化学原理,北京:化学出版工业社,1985,p．3283SakonoT,TodaK,HandaM．MaterialsProtection,1966,5(12):454孙鸿建,火时中．中国腐蚀与防护学报,1987,7(2):1155H．克舍著,吴荫顺译．金属腐蚀,北京:化学工业出版社,1984．382

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