The role of indium in the activation of aluminum alloy galvanic anodes

POURGHARIBSHAHI, M. and LAMBERT, Paul (2016). The role of indium in the activation of aluminum alloy galvanic anodes. Materials and Corrosion, 67 (8), 857-866.

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Link to published version:: 10.1002/maco.201508685


Despite six decades use of aluminum as a galvanic (sacrificial) anode, there remains a need for a better understanding of the underlying mechanisms for enhancing its efficient performance in cathodic protection systems. A few mechanisms have been proposed for the role of indium in the activation of Al-Zn-In anodes and there appears to be no general agreement on whether this element plays its depassivating role by modifying the bulk microstructure of the anode, chemical composition of its surrounding electrolyte or directly through doping the structure of the passive oxide film. These mechanisms have been critically reviewed to achieve a more comprehensive understanding of the role of indium in such applications. Moreover, the novel solidification processing called controlled diffusion solidification (CDS) has been introduced as an efficient way to surmount the poor castability of the anode alloy without any need for the addition of elements with detrimental effects on the electrochemical properties of the anode.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Infrastructure Management
Identification Number: 10.1002/maco.201508685
Depositing User: Margaret Boot
Date Deposited: 16 Sep 2016 13:49
Last Modified: 23 Oct 2016 21:22

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