高强铝合金焊接接头力学-电化学腐蚀行为与退化规律研究

胡娜, 彭文山, 郭为民, 刘天楠, 段体岗, 刘少通

Mechanical-electrochemical Corrosion Behavior and Degradation Regularity of High Strength Al-alloy Welded Joints

HU Na, PENG Wenshan, GUO Weimin, LIU Tiannan, DUAN Tigang, LIU Shaotong

表2 不同应力下高强铝合金焊接接头在低温海水中浸泡不同周期极化拟合结果

Table 2 Fitting results of polarization curves of the welded joint immersed in low-temperature seawater under different conditions of applied stresses and immersion period

Immersion time / d Pre-stress Self-corrosion potential E0 / V Self-corrosion current density I0 / A·cm-2 1 0 -0.652 0.395 × 10-6 25%σs -0.693 2.023 × 10-6 50%σs -0.754 4.467 × 10-6 5 0 -0.757 0.775 × 10-6 25%σs -0.856 4.6 × 10-6 50%σs -0.820 6.94 × 10-6 10 0 -0.766 0.983 × 10-6 25%σs -0.813 15.58 × 10-6 50%σs -0.897 15.37 × 10-6 20 0 -0.801 2.36 × 10-6 25%σs -0.838 12.56 × 10-6 50%σs -0.846 17.2 × 10-6