交变压力对无溶剂环氧涂层在模拟超深海环境下的电化学行为

王腾宇, 张正贵, 陆卫中, 吴希革

Effect of Alternating Pressure on Electrochemical Behavior of Solvent-free Epoxy Coating in Simulated Ultra-deep Sea Environment

WANG Tengyu, ZHANG Zhenggui, LU Weizhong, WU Xige

表2 涂层B在0.1~30 MPa交变压力下浸泡480 h期间EIS参数拟合结果

Table 2 Fitting results of EIS parameters of epoxy liquid coating during 480 h immersion under 0.1-30 MPa alternating pressure

Time / h Rc / Ω·cm2 n1 Qc / F·cm-2 Rct / Ω·cm2 n2 Qdl / F·cm-2 Zw 6 2.186×1010 0.9246 2.797×10-10 --- --- --- --- 28 8.24×109 0.8976 3.682×10-10 --- --- --- --- 41 6.425×107 0.9578 4.089×10-10 3.303×108 0.512 2.626×10-9 --- 52 5.344×107 0.9584 8.099×10-10 4.179×108 0.409 7.318×10-9 --- 75 3.188×108 0.9524 9.204×10-10 1.217×1010 0.6368 4.376×10-9 --- 144 1.627×108 0.9487 9.298×10-9 3.741×108 0.6103 3.621×10-9 --- 240 4.078×105 0.9671 1.134×10-8 8.643×106 0.8 1.303×10-8 --- 360 8.964×105 0.9535 1.136×10-8 7.24×107 0.5437 1.472×10-9 3.332×10-7 480 1.615×105 1 1.134×10-8 6.376×106 0.8238 4.344×10-9 4.105×10-7