Effects of magnetic field and rare earth addition on corrosion behavior of Al-3.0 wt% Mg alloy

摘要

Effect of magnetic field and rare earth on the corrosion behavior of Al-3.0 wt%Mg alloy in 3.5 wt% NaCl solution was investigated by immersion test and electrochemical measurement. The results indicated that a horizontal magnetic field would increase the corrosion potential (E-corr), impede the growth of pitting holes and reduce the corrosion current density i(corr) and corrosion rate of Al-3.0 wt% Mg-xR(E) alloys. Proper content of R-E would increase the corrosion resistance of Al-3.0 wt% Mg alloys. Excessive R-E would enhance the effect of magnetic field on the pitting corrosion sensibility and increased the corrosion rate of Al-3.0 wt% Mg alloys due to the increase of the number and the size of the second phases. (C) 2016 Elsevier B.V. All rights reserved.