Corrosion behavior of Al-3.0 wt%Mg alloy in NaCl solution under magnetic field

• Published in: Rare metals Vol. 36; no. 8; pp. 627 - 634
• Main Authors: Zhang, Xin, Wang, Ze-Hua, Zhou, Ze-Hua, Xu, Jian-Ming, Zhong, Zhao-Jun, Yuan, Huan-Long
• Format: Journal Article
• Language: English
• Published: Beijing Nonferrous Metals Society of China 01.08.2017; Springer Nature B.V
• Subjects: Alloys; Aluminum; Al–3.0 wt%Mg alloy; Applied magnetic field; Biomaterials; Chemistry and Materials Science; Corrosion currents; Corrosion potential; Corrosion rate; Current density; Energy; Magnesium base alloys; Magnetic fields; Magnetism; Materials Engineering; Materials Science; Metallic Materials; NaCl溶液; Nanoscale Science and Technology; Paramagnetic ion; Physical Chemistry; Pitting corrosion; Scanning electron microscopy; Sodium chloride; Spectroscopic analysis; 外加磁场; 扫描电子显微镜; 模型合金; 电化学方法; 腐蚀行为; 镁合金; Pitting corrosion; Applied magnetic field; Al–3.0 wt%Mg alloy; Paramagnetic ion
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-016-0785-5

The influences of applied magnetic field on the corrosion behavior of Al-3.0 wt%Mg alloy in 3.5 wt% NaCl solution were investigated by electrochemical measurements,scanning electron microscopy（SEM）and energy-dispersive spectroscopy（EDS）.Stochastic analysis was applied to investigate the influences of applied magnetic field.The results indicate that the application of horizontal magnetic field of 0.4 T would increase the pitting corrosion potential（E_（pit））,decrease the corrosion current density（i_（corr））,prolong the pit initiation time,slow down the pit generation rate and inhibit the growth of pitting of the tested alloys in 3.5 wt% NaCl solution.The applied magnetic field would also change the mechanism of pit initiation of Al-3.0 wt%Mg alloy from A_3 model（without magnetic field）to A_3＋A_4 model（with magnetic field）.The intermediate product Al_（（ad））~＋ is the paramagnetic ion that would be influenced by magnetic field sensitively.