利用EIS研究环氧防锈涂层实验室模拟实验和实海浸泡实验相关性

用电化学阻抗法 (EIS) 研究了环氧防锈涂层在实海浸泡实验及在3.5%NaCl溶液中浸泡实验和盐雾实验两种实验室模拟实验中的腐蚀失效行为,探讨了实海浸泡实验与2种实验室模拟实验的低频阻抗模值|Z |_{0.01 Hz}之间的对应关系。结果表明：3种腐蚀环境对所研究的涂层体系的破坏作用由小到大依次为：3.5%NaCl溶液<实海浸泡<盐雾;相对实海浸泡实验,盐雾实验对环氧涂层腐蚀失效的加速因子约为2.3。

Correlation of Corrosion Severity on Epoxy Coating Induced by Laboratory Simulation Test and Real Seawater Immersion Test

Corrosion behavior of epoxy coating induced by immersion in real seawater as well as immersion in 3.5%NaCl solution and salt spray in laboratory was characterized by means of electrochemical impedance spectroscopy (EIS). Then the relationship between the electrochemical impedance (|Z |_{0.01 Hz}) of the coating tested in the two laboratory environments and that in seawater immersion test were analyzed. It follows that the degree of corrosion severity of the above three test environments could be ranked as: 3.5%NaCl solution