Influence of cerium content on the corrosion behavior of Al-Co-Ce amorphous alloys in 0.6 M NaCl solution. Issue 7 (July 2019)

• Record Type: Journal Article
• Authors: Zhang, L.M.; Zhang, S.D.; Ma, A.L.; Umoh, A.J.; Hu, H.X.; Zheng, Y.G.; Yang, B.J.; Wang, J.Q.
• Is Part Of: Journal of materials science & technology. Volume 35:Issue 7(2019)
• Page Start: 1378
• Page End: 1387
• Publication Date: 2019-07
• Subjects: Amorphous materials -- Polarization -- Corrosion -- Photoelectron spectroscopies; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2019.03.014
• Languages: English
• ISSNs: 1005-0302

Abstract

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 alloys displayed a decreased tendency with the increase in Ce content, and the amorphous alloy with 4 at.% Ce presented both the lowest passive current density 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 the corrosion 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 were discussed.