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  

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

作　　者：张寒露[1,2] 左禹[1] 曹京宜 顿玉超 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]海军涂料分析检测测中心,北京102442

出　　处：《腐蚀科学与防护技术》2016年第4期332-336,共5页Corrosion Science and Protection Technology

摘　　要：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%Na Cl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|_(0.01Hz)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。Corrosion behavior of epoxy coating induced by immersion in real seawater as well as immersion in 3.5%Na Cl 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% Na Cl solution〈seawater immersion〈salt spray. The salt spray test exhibited c.a. 2.3 fold stronger corrosivity for the epoxy coating, or say c.a. 2.3 acceleration effect on the corrosion of epoxy coating in comparison with the real seawater corrosion.

关 键 词：电化学阻抗法 环氧涂层 阻抗值 相关性 

分 类 号：TG172[金属学及工艺—金属表面处理]