CeLa enhanced corrosion resistance of Al-Cu-Mn-Mg-Fe alloy for lithium battery shell

被引：11

作者：

Du, Jiandi ^{[1
]}

Ding, Dongyan ^{[1
]}

Zhang, Wenlong ^{[1
]}

Xu, Zhou ^{[1
]}

Gao, Yongjin ^{[2
]}

Chen, Guozhen ^{[2
]}

Chen, Weigao ^{[2
]}

You, Xiaohua ^{[2
]}

Chen, Renzong ^{[3
]}

Huang, Yuanwei ^{[3
]}

Tang, Jinsong ^{[3
]}

机构：

[1] Shanghai Iiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

[2] Huafon NLM Al Co Ltd, Shanghai 201506, Peoples R China

[3] Shanghai Huafon Mat Technol Inst, Shanghai 201203, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 422卷

关键词：

Al-Cu-Mn-Mg-Fe alloy; CeLa addition; Potentiodynamic polarization; Electrochemical impedance spectroscopy; ELECTROCHEMICAL-BEHAVIOR; ALUMINUM-ALLOYS; NACL SOLUTION; INTERMETALLIC PHASES; LOCALIZED CORROSION; CHLORIDE SOLUTIONS; PITTING CORROSION; MAGNESIUM ALLOY; AA; 2024-T3; MICROSTRUCTURE;

D O I：

10.1016/j.apsusc.2017.06.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Effects of CeLa addition on the localized corrosion and electrochemical corrosion behavior of Al-Cu-Mn-Mg- Fe lithium battery shell alloy were investigated by immersion testing and electrochemical testing in 0.6 M NaCl solution at different temperatures. Experimental results indicated that CeLa addition resulted in the formation of AlCuCe/La (Al8Cu4Ce and Al6Cu6La) local cathodes and corrosion activity of the main intermetallic particles decreased in the order of Al2CuMg, AlCuCe/La, Al-6(Mn, Fe). Corrosion potential shifted positively due to CeLa alloying. Corrosion current density of the CeLa-containing alloy was lower than that of the CeLa-free alloy at room temperature. At room temperature, there was no obvious surface passivation for both alloys. At 80 degrees C CeLa addition resulted in a wide passive region at the anode polarization region. Electrochemical impedance spectroscopy (EIS) analysis also indicated that corrosion resistance of the CeLa-containing alloy was much higher than that of the CeLa-free alloy. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：221 / 227

页数：7

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