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Effect of Cooling Rate on the Corrosion Behaviour of Zn-Al and Zn-Al-Mg Alloy

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Abstract:

Zinc and its alloy is non-ferrous metal often used as anodic material for the corrosion control in industries. The aim of this research is to determine the corrosion behavior of Zn alloy with different cooling rate during casting process. The three zinc alloys used were Zn-0.5Al, Zn-0.5Al-0.1Mg and Zn-0.5Al-0.3Mg. The cooling rates were varied by pouring the melt into the ceramic and steel moulds. Thermal analysis test was conducted to indentify phase reaction and quantify the cooling rate data. Material characterization and electrochemical test were performed on the cast samples by using standard equipment. The results show that the Zn-0.5Al-0.3Mg cast with fast cooling rate had the lowest corrosion rate compare to others. This indicates that the magnesium addition can improve the corrosion resistance of Zn-Al alloy.

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Periodical:

Materials Science Forum (Volume 819)

Pages:

71-75

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.819.71

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Online since:

June 2015

Authors:

H.T. Low, Esah Hamzah*, S. Farahany, Hamid Reza Bakhsheshi-Rad, M.H. Cho

Keywords:

Cooling Rate, Corrosion, Zinc Alloy

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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