Exfoliation Corrosion of As-Extruded Mg-1Li-1Ca:the Influence of the Superficial Layer

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外文摘要：Exfoliation corrosion(EFC)has rarely been reported for wrought magnesium alloys.Enhanced EFC of the as-extruded Mg-1Li-1Ca alloy was observed after the removal of outermost fine-grained skins.The microstructure and corrosion products were investigated using optical microscopy,scanning electron microscopy,electron backscattered diffraction,X-ray diffraction,and Fourier transform infrared spectrometry.The corrosion behavior was analyzed using electrochemical polarization,electrochemical impedance spectroscopy,and scanning Kelvin probe techniques.The results indicated that the surface of Mg-1Li-1Ca,with the superficial layer removed,was more susceptible to EFC.A linear correlation between grain boundary density and corrosion resistance was established.Additionally,the influence of factors such as grain size,intermetallic compounds,different alloy surfaces,and corrosion products on EFC were discussed,and the corresponding EFC mechanism was clarified.

外文关键词：

Magnesium alloysExfoliation corrosionMicrostructureIntermetallic compoundMetamorphic skin

作者：

Ze-Song Wei、Zi-You Ding、Lei Cai、Shao-Xia Ma、Dong-Qing Zhao、Lan-Yue Cui、Cheng-Bao Liu、Yuan-Sheng Yang、Yuan-Ding Huang、Rong-Chang Zeng

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作者单位：

Corrosion Laboratory for Light Metals,College of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China

Engineering Research Center for Magnesium-Based New Materials,Center for Advancing Materials Performance from the Nanoscale(CAMP-Nano),State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China

Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China

Institute of Metals Research,Chinese Academy of Sciences,Shenyang 110016,China

Institute of Metallic Biomaterials,Helmholtz-Zentrum Hereon,Max-Planck-Str.1,21502 Geesthacht,Germany

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基金：

National Natural Science Foundation of China

项目编号：

52071191

出版年：

2024

DOI：

10.1007/s40195-024-01708-x

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(8)