5083-H111铝合金在模拟动态海水环境中的局部腐蚀机制

邓成满, 刘喆, 夏大海, 胡文彬

Localized Corrosion Mechanism of 5083-H111 Al Alloy in Simulated Dynamic Seawater Zone

DENG Chengman, LIU Zhe, XIA Da-Hai, HU Wenbin

表1 基于电化学等效电路的EIS拟合参数

Table 1 EIS fitting parameters based on the electrochemical equivalent circuit

Time d CPEf Rf103 Ω⸱cm2 CPEdl Rct104 Ω⸱cm2 Rp104 Ω⸱cm2 ∑χ2 Qf / 10-6 Ω-1⸱cm-2⸱snf nf Qdl / 10-6 Ω-1⸱cm-2⸱sndl ndl 1 2.061 0.865 1.283 4.436 0.897 7.346 7.474 2.705×10-2 16 11.42 0.894 0.721 10.731 0.919 9.398 9.471 2.029×10-3 36 2.436 0.933 1.116 10.672 0.855 9.605 9.717 2.866×10-2 56 1.981 0.987 0.413 9.570 0.840 6.216 6.257 4.264×10-2