Corrosion Behavior of Al-3.0Mg-xRE/Fe Alloys Under Magnetic Field of Different Intensities

doi:10.11902/1005.4537.2021.247

Journal of Chinese Society for Corrosion and protection

2022, Vol. 42

Issue (5): 833-838 DOI: 10.11902/1005.4537.2021.247

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Corrosion Behavior of Al-3.0Mg-xRE/Fe Alloys Under Magnetic Field of Different Intensities

HUANG Lianpeng, ZHANG Xin(

), XIONG Yiming, TAO Jiahao, WANG Zehua, ZHOU Zehua

College of Mechanics and Materials, Hohai University, Nanjing 211100, China

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Abstract

The corrosion behavior of Al-3.0Mg-xRE/Fe alloys in 3.5%NaCl solution in the presence of magnetic field of different intensities was studied by means of electrochemical workstation, and scanning electron microscope (SEM) with energy disperse spectroscopy (EDS). The results indicated that the applied magnetic field could enhance the corrosion potential and pitting corrosion potential, and reduce the corrosion current density of Al-3.0Mg-xRE/Fe alloys. At the same time, the amount and size of the formed pits in the presence of magnetic field were lower than those in the absence of magnetic field. Magnetic field can reduce the corrosion- and pitting-sensitivity, and the corrosion rate of Al-3.0Mg-xRE/Fe alloys. With the increase of magnetic field intensity, the inhibition effect of magnetic field is enhanced.

Key words: Al-Mg alloy with different electrode potential phases rare earth elements magnetic field corrosion behavior pitting corrosion

Received: 22 September 2021

ZTFLH:

TG.174.442

Fund: National Natural Science Foundation of China(51909071);Natural Science Foundation of Jiangsu Province(BK20190493);Fundametal Scientific Resarch Business Expenses of CentralUniversities(B220202040)

Corresponding Authors: ZHANG Xin E-mail: zhangxin.007@163.com

About author: ZHANG Xin, E-mail: zhangxin.007@163.com

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	Lianpeng HUANG
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Cite this article:

HUANG Lianpeng, ZHANG Xin, XIONG Yiming, TAO Jiahao, WANG Zehua, ZHOU Zehua. Corrosion Behavior of Al-3.0Mg-xRE/Fe Alloys Under Magnetic Field of Different Intensities. Journal of Chinese Society for Corrosion and protection, 2022, 42(5): 833-838.

URL:

https://www.jcscp.org/EN/10.11902/1005.4537.2021.247 OR https://www.jcscp.org/EN/Y2022/V42/I5/833

Fig.1 Device for electrochemical test

Fig.2 Surface morphologies of Al-3.0Mg (a), Al-3.0Mg-0.2RE (b), Al-3.0%Mg-1.0RE (c), Al-3.0%Mg-0.2Fe (d) and Al-3.0%Mg-1.0Fe (e) alloys

Table 1 EDS analysis of Al-3.0Mg with different second phase characteristics (mass fraction / %)

Fig.3 Surface morphologies of 0%RE or Fe (a); 0.2%RE (b); 1.0%RE (c); 0.2%Fe (d); 1.0%Fe (e) alloy immersed in 3.5%NaCl solution for 7 d under 0 T (a1-e1), 0.2 T (a2-e2) and 0.4 T (a3-e3) magnetic field

Fig.4 Surface morphologies of Al-3.0Mg-0.2RE (a) and Al-3.0Mg-0.2Fe (b) alloy immersed in 3.5%NaCl solution for 7 d

Table 2 EDS analysis of Al-3.0Mg-0.2RE/Fe alloy immersed in 3.5%NaCl solution for 7 d (mass fraction / %)

Fig.5 Tafel curves of Al-3.0Mg (a), Al-3.0Mg-0.2RE (b), Al-3.0%Mg-1.0RE (c), Al-3.0%Mg-0.2Fe (d) and Al-3.0%Mg-1.0Fe (e) alloys with different phase characteristics in 3.5%NaCl solution under 0, 0.2 and 0.4 T magnetic field

Table 3 Values of E_corr, I_corr and E_pitof Al-3.0Mg alloys with different contents of RE/Fe tested under 0, 0.2 and 0.4 T magnetic field derived from the polarization curves

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