Microstructure and Electrochemical Properties of Ce-Containing 7072 Al Alloy

Abstract:

The microstructure and electrochemical properties of Ce-containing 7072 Al alloy were investigated through transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Tafel polarization analysis. It was found that Ce alloying could result in a formation of finer grains in the simulated brazing alloys. The 7072 Al alloy with 0.15% Ce had desirable distribution of precipitates. The electrochemical testing results indicated that Ce element had a great impact on the corrosion potential of the alloy tested in 0.5% NaCl solution. Alloying with 0.15% Ce element could make the corrosion potential shift to inert direction and reduce the corrosion current density. An excessive Ce addition could weaken its positive effect on the corrosion resistance of the Ce-containing alloy.

• Periodical: Advanced Materials Research (Volume 704)
• Pages: 114-119
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.704.114
• Online since: June 2013
• Authors: Jing Feng, Dong Yan Ding, Wen Long Zhang, Yong Jin Gao, Guo Zhen Chen, Yuan Wei Huang, Jin Song Tang
• Keywords: Aluminium Alloy, Corrosion, Microstructure, Rare Earth Alloying

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