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Journal of Chinese Society for Corrosion and protection  2020, Vol. 40 Issue (5): 432-438    DOI: 10.11902/1005.4537.2019.201
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Corrosion Behavior of Al-Mg-RE Alloy Wires Subjected to Different Cold Drawing Deformation
ZHANG Xin1,2(), YANG Guangheng1, WANG Zehua1, CAO Jing1, SHAO Jia1, ZHOU Zehua1
1 College of Mechanics and Materials, Hohai University, Nanjing 211100, China
2 Ocean and Offshore Engineering Research Institute, Hohai University, Nantong 226300, China
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Al-Mg alloys are considered as the ideal electromagnetic shielding materials and widely applied on electronic and communication servicing in marine environment due to their excellent comprehensive properties, such as high specific strength, low electric resistivity and excellent corrosion resistance. The microstructure and corrosion behavior of Al-3.0%Mg-0.12%RE alloy wires subjected to different cold drawing deformation was investigated by means of optical microscope (OM), scanning electron microscope (SEM), energy disperse spectroscopy (EDS) and electrochemical measurement. The influence of cold-drawing strain and microstructure on corrosion resistance of the alloy was also examined. The results indicated that the equiaxed grains of the alloys were elongated and the skeletal second phase particles were fragmented during the cold-drawing process. The corrosion behavior of the Al-3.0%Mg-0.12%RE alloy showed typical characteristics of pitting corrosion at the position of second phases. With the increase of strain, the uniform corrosion sensibility increased, pitting corrosion sensibility declined and the corrosion resistance of the alloy improved.

Key words:  Al-3.0%Mg-0.12%RE alloy      cold drawing process      corrosion behavior      pitting corrosion     
Received:  13 November 2019     
ZTFLH:  TG174  
Fund: Nantong Municipal Science and Technology Project(JC2018047);Fundamental Research Funds for the Central Universities(2018B02514)
Corresponding Authors:  ZHANG Xin     E-mail:

Cite this article: 

ZHANG Xin, YANG Guangheng, WANG Zehua, CAO Jing, SHAO Jia, ZHOU Zehua. Corrosion Behavior of Al-Mg-RE Alloy Wires Subjected to Different Cold Drawing Deformation. Journal of Chinese Society for Corrosion and protection, 2020, 40(5): 432-438.

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Fig.1  Sample casting of Al-3.0%Mg-0.12%RE alloys
Fig.2  Diagrammatic sketch of drawing machine
Fig.3  Diagrammatic sketchs of sample option for structure analysis and corrosion test
Fig.4  Optical image (a), SEM image (b) and EDS analysis of Fe (c), Al (d), Mg (e), Ce (f) and La (g) of Al-3.0%Mg-0.12%RE alloy
Fig.5  Microstructure of Al-3.0%Mg-0.12%RE alloy with different strain: (a) 51%; (b) 64%; (c) 75%; (d) 84%; (e) 91%; (f) 96%
Fig.6  Second phase micrographs of Al-3.0%Mg-0.12%RE alloys with different strain: (a) 51%; (b) 64%; (c) 75%; (d) 84%; (e) 91%; (f) 96%
Fig.7  Surface morphologies (a, b) and EDS analysis (c, d) of as-cast Al-3.0%Mg-0.12%RE alloys after the 21 d immersion test in 3.5%NaCl solution
Fig.8  Surface morphologies of Al-3.0%Mg-0.12%RE alloys with different strains after 21 d immersion test: (a) 51%, (b) 64%, (c) 75%, (d) 84%, (e) 91%, (f) 96%
Fig.9  Potentiodynamic polarization curves of Al-3.0%Mg-0.12%RE alloys with different strain
Strain / %Ecorr / VEpit / V
Table 1  Ecorr and Epit valus of Al-3.0%Mg-0.12%RE alloys with different strains
Fig.10  Nyquist diagram of Al-3.0%Mg-0.12%RE alloys with different strains
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