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Effect of Calcium Addition and Heat Treatment on the Al-Zn-In Alloys as Sacrificial Anode

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Abstract:

Aluminium alloys are successfully used in marine and offshore structure in purpose of cathodic protection. Aluminium itself has poor electrochemical properties for sacrificial anode applications. Hence it is alloyed with other elements to improve its characteristics. This study was conducted to investigate the influence of calcium addition and also heat treatment on the potential and current capacity of Al-Zn-In anodes. The electrochemical performance of these anodes was evaluated by electrochemical test based on NACE standard method. SEM and EDAX analyses were used to examine the surface structure of the anodic materials. The results were then compared with those of the base alloy without calcium and untreated specimens to understand the behaviour of the anode after alloying and heat treatment.

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Periodical:

Materials Science Forum (Volumes 546-549)

Pages:

761-766

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.546-549.761

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Online since:

May 2007

Authors:

S. Jafarpishe, C. Dehghanian, Masoud Emamy

Keywords:

Al-Zn-In Alloy, Calcium, Cathodic Protection (CP), Indium, Sacrificial Anode, Zinc

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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