Effect of Mn on microstructure and corrosion properties of extruded Mg-1%Zn alloy

17th IUMRS International Conference in Asia

Zhang, Z.M.^1,2 ; Ma, Y.^1 ; Xi, Z.Z.^2 ; Xu, C.J.^1 ; Lv, Z.L.^1

School of Materials Science and Engineering, Key Laboratory of Electrical Materials and Infiltration Technology of Shaanxi Province, Xi'An University of Technology, Xi'an

710048, China^1

School of Materials and Chemical Engineering, Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, Xi'An Technological University, Xi'an

710032, China^2

关键词: Corrosion process;    Corrosion property;    Effect of Mn;    Electrochemical corrosion behavior;    Electrochemical test;    Energy dispersive X ray spectroscopy;    Immersion method;    Mass fraction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/182/1/012048/pdf
DOI  :  10.1088/1757-899X/182/1/012048

来源: IOP

【 摘 要 】

The microstructure of the extruded Mg-1Zn alloy doped with different content of manganese was analyzed by optical microscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy and X-ray diffractometry. The mass-loss immersion method and electrochemical test were used to evaluate the corrosion properties. The results show that the microstructure of the extruded Mg-1%Zn-x%Mn (mass fraction, x=0.4, 0.8, 1.2) alloys consists of α-Mg and α-Mn, the grain size of α-Mg decreases with increasing Mn content. Electrochemical corrosion behavior of the alloys is similar. Mn has considerable effect on the corrosion rate, the corrosion process is exacerbated by the galvanic corrosion occurred at interface between α-Mg and α-Mn. The corrosion rate increases as the Mn content increases. Mg-1%Zn-0.4% Mn alloy exhibits the best corrosion resistance between the Mg-1%Zn-x%Mn alloys.