Influence of Si on the Electrochemical Performance of Al-Zn-In-Mg-Ti Sacrificial Anode Alloy

Abstract:

The effects of Si content on the electrochemical performance of Al-5Zn-0.03In-1Mg- 0.05Ti (wt.%) alloy were studied by the electrochemical measurements and metallographic method. The optimal microstructures and electrochemical performance were obtained when the Si content in Al-Zn-In-Mg-Ti alloy was 0.1 wt.%. This anode alloy shows a current efficiency of 94.3% with even corrosion. However, in the case of Si content over 0.1 wt.%, the electrochemical performance of aluminum sacrificial anode shows only a nil improvement, and the corrosion morphology becomes uneven. The results reveal that the appropriate amount of Si is effective on reducing the harmful effect of iron impurities, improving the non-uniform corrosion and the electrochemistry performance of Al-Zn-In-Mg-Ti alloy.

• Periodical: Advanced Materials Research (Volumes 146-147)
• Pages: 691-695
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.146-147.691
• Online since: October 2010
• Authors: Jiu Ba Wen, Jun Guang He, Xian Wen Lu
• Keywords: Aluminium Alloy, EIS, Electrochemical Property, Silicon

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