应力作用下2297铝锂合金腐蚀行为研究

于美,魏新帝,范世洋,刘建华,李松梅,钟锦岩

Corrosion Behavior of 2297 Al-Li Alloy under Tensile Load

Mei YU,Xindi WEI,Shiyang FAN,Jianhua LIU,Songmei LI,Jinyan ZHONG

表2 不同应力下2297-T87铝锂合金在3.5%NaCl溶液中浸泡1 h后的阻抗参数拟合值

Table 2 Fitting values of various electrochemical parameters from EIS data of 2297-T87 Al-Li alloy after immersion in 3.5%NaCl solution for 1 h under different stress loads

Stress load Rs / Ω·cm2 Qh / Yh·Ω-1·cm-2·sn nf Rh / Ω·cm2 Qdl / Ydl·Ω-1·cm-2·sn ndl Rct / Ω·cm2 0%σ0.2 3.02 1.67×10-5 8.76×10-1 1.48×104 8.76×10-5 1.000 2.35×104 30%σ0.2 4.487 1.86×10-5 8.17×10-1 1.37×104 9.03×10-5 0.991 2.05×104 60%σ0.2 3.52 1.68×10-5 8.80×10-1 1.41×104 9.29×10-5 1.000 1.85×104 90%σ0.2 3.17 1.51×10-5 8.71×10-1 1.52×104 9.77×10-5 1.000 1.56×104 103%σ0.2 2.93 1.78×10-5 8.61×10-1 1.27×104 1.30×10-4 1.000 1.23×104