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26. Effect of cerium content on the corrosion characteristics of Al-Co-Ce amorphous alloy solution

Author

Zhang, S.D., Zhang, L.M., Hu, H.X., Umoh, A.J., Zheng, Y.G., Yang, B.J., and Ma, A.L.

Subjects
bepress|Engineering|Materials Science and Engineering|Ceramic Materials, engrXiv|Engineering, bepress|Engineering, technology, industry, and agriculture, bepress|Engineering|Materials Science and Engineering, engrXiv|Engineering|Materials Science and Engineering, engrXiv|Engineering|Materials Science and Engineering|Ceramic Materials, equipment and supplies
Abstract

The effect of cerium content on the corrosion behavior of Al-Co-Ce amorphous alloys in 0.6 M NaCl solution was investigated by cyclic polarization,Mott-Schottky and X-ray photoelectron spectroscopy techniques. Results indicated that the open circuit potential of Al-Co-Ce amorphous alloysdisplayed a decreased tendency with the increase in Ce content, and the amorphous alloy with 4 at.% Ce presented both the lowest passive currentdensity and donor density indicating the best corrosion resistance while adding excess Ce led to the reduced corrosion resistance of Al-Co-Ce alloys.Furthermore, it was found that a low Ce content is beneficial to the formation of a more protective passive film on Al-Co-Ce amorphous alloys, and thecorrosion inhibition reactions of Al-Co-Ce alloys in 0.6 M NaCl solution were changed with the increase in Ce content and the detailed reasons werediscussed.

Published
2019

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