AZ91D镁合金和2002铝合金在0.5 mg/L NaCl溶液中的电偶腐蚀行为研究

刘泽琪, 何潇潇, 祁康, 黄华良

Galvanic Corrosion Behavior for Galvanic Couple of AZ91D Mg-alloy/2002 Al-alloy in 0.5 mg/L NaCl Solution

LIU Zeqi, HE Xiaoxiao, QI Kang, HUANG Hualiang

表1 未耦合和耦合后再断开条件下AZ91D镁合金和2002铝合金在30 ℃,0.5 mg/L NaCl溶液中浸泡24 h后的极化曲线拟合参数

Table 1 Fitting parameters of polarization curves of AZ91D Mg-alloy and 2002 Al-alloy immersed in 0.5 mg/L NaCl solution at 30 ℃ for 24 h under the conditions of uncoupling and uncoupling after coupling

Material Condition Bc / mV·dec-1 Icorr / A·cm-2 Ecorr / V Mg-alloy Uncoupling -215.50 7.43×10-7 -1.43 Coupling -144.93 2.22×10-6 -1.42 Al-alloy Uncoupling -233.56 1.57×10-6 -0.51 Coupling -554.99 4.36×10-6 -0.49