The penetration law of chloride ion in the fluorocarbon separate coating and the deterioration process of fluorocarbon coating were investigated by permeability test and EIS, respectively. The results show that the diffusion of chlorine ion in fluorocarbon separate coating have a time critical point. The spread of chlorine ion in coating reach a dynamic balance stage before the critical point, then the chlorine ion in coatings diffusion present linear increase trend. The permeability of chlorine ion in fluorocarbon coatings slower than fluorocarbon resin layer. And solution and temperature on the infiltration of chloride ion in fluorocarbon coating have clear influence on the transmission. The EIS result also indicates that the coating capacitance(Cc) all have ascendant trend. Besides, the artificial seawater had more corrosive effect than 3.5％ (mass fraction)NaCl solution at 15℃ .%采用渗透实验和电化学阻抗谱(EIS)分别研究了氯离子在氟碳涂层游离膜中的渗透规律以及不同温度、不同溶液对复合涂层体系耐蚀性能的影响.渗透实验结果表明:氯离子在氟碳涂层游离膜中的扩散存在一个时间临界点.在临界点之前,氯离子在游离膜两侧浓差作用下迅速达到动态平衡;在临界点之后,氯离子在游离膜中的扩散则呈线性增加趋势,并且氯离子在复合涂层游离膜中的渗透速率比在单层游离膜中的渗透速率慢.EIS结果表明:溶液和温度对氯离子在复合涂层体系中的渗透有较大的影响,虽然涂层电容值在不同条件下均呈上升趋势,但在15℃下,人造海水溶液对复合涂层体系的腐蚀性比3.5%(质量分数)NaCl溶液对复合涂层体系的腐蚀性强.
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