Enhanced corrosion resistance of Mg17Al12 compounds by Ce modification

Li, Yanrui1; Wu, Zheng1; Wei, Jiali1; Wu, Pengpeng1; Zhang, Yuezhong1; Wu, Huajie1; Liang, Shangshang1; Yong, Hui1; Song, Guangling1,2; Fang, Daqing1,3; Liu, Baosheng1; Wei, Yinghui1,4

2023-12-01

10.1016/j.vacuum.2023.112663

VACUUM   影响因子和分区

0042-207X

1879-2715

Mg17Al12-xCe (x = 0, 0.1, 0.5, 1 wt%) intermetallic compounds have been prepared by vacuum induction melting, in order to enhance the corrosion resistance of Mg17Al12 compound by Ce modification. The results have showed that the Mg17Al12 compound compose of /9-Mg17Al12 substrate and eutectic structure (alpha-Mg and /9-Mg17Al12 phases) distributed continuously along grain boundaries under non-equilibrium solidification conditions. A high cathode to anode area ratio of the eutectic structure results in poor corrosion resistance of the Mg17Al12 compound. The eutectic structure distributed continuously along the grain boundaries can be interrupted and corrosion could not propagate along the grain boundaries in Mg17Al12 compound alloyed by 0.1 wt% Ce. Hence, the corrosion performance of Mg17Al12 compound has been improved by 0.1 wt% Ce. With the Ce content further increasing to 0.5 wt%, the corrosion resistance of the compounds could be effectively improved due to the formation of dense corrosion products film. Additionally, the complete suppression of eutectic structure effectively reduces electrochemical corrosion of compounds containing more than 0.5% Ce. On the contrary, due to the precipitation of more Al11Ce3 phase, the corrosion resistance of Mg17Al12-1Ce alloy is slightly deteriorated based on the galvanic corrosion mechanism.

Mg 17 Al 12 compounds Ce alloyed Passive films Electrochemical Corrosion behaviors

SCI ; EI

英语

其他

Key Scientific Research Project in Shanxi Province["202102050201003","202103021223293"] ; National Natural Science Foundation of China[52071227] ; Central Guiding Science and Technology Development of Local Fund[YDZJSK20231A046] ; Post- graduate Education Innovation Project of Taiyuan University of Science and Technology[BY2023002]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:001088886200001

PERGAMON-ELSEVIER SCIENCE LTD

20234114848404

Aluminum corrosion ; Binary alloys ; Cerium alloys ; Corrosion resistance ; Corrosion resistant alloys ; Corrosive effects ; Electrodes ; Eutectics ; Galvanic corrosion ; Grain boundaries ; Magnesium alloys ; Precipitation (chemical) ; Vacuum applications

Metallurgy and Metallography:531 ; Metallography:531.2 ; Metals Corrosion:539.1 ; Aluminum:541.1 ; Aluminum Alloys:541.2 ; Magnesium and Alloys:542.2 ; Rare Earth Metals:547.2 ; Alkaline Earth Metals:549.2 ; Vacuum Applications:633.1 ; Chemical Operations:802.3

MATERIALS SCIENCE

2-s2.0-85173158935

Web of Science

1.Taiyuan Univ Sci & Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China
2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, 10088 Xueyuan Ra, Shenzhen 518055, Peoples R China
3.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
4.Taiyuan Univ Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China

Li, Yanrui,Wu, Zheng,Wei, Jiali,et al. Enhanced corrosion resistance of Mg17Al12 compounds by Ce modification[J]. VACUUM,2023,218.

Li, Yanrui.,Wu, Zheng.,Wei, Jiali.,Wu, Pengpeng.,Zhang, Yuezhong.,...&Wei, Yinghui.(2023).Enhanced corrosion resistance of Mg17Al12 compounds by Ce modification.VACUUM,218.

Li, Yanrui,et al."Enhanced corrosion resistance of Mg17Al12 compounds by Ce modification".VACUUM 218(2023).