电化学方法研究环氧防锈涂料实验室实验与实海环境实验的相关性
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摘要
用电化学交流阻抗法(EIS)研究了环氧防锈涂料在实海浸泡实验和3.5%NaCl溶液浸泡实验、盐雾实验、湿热实验3种实验室加速实验中的失效行为,探讨了实海浸泡实验和3种实验室加速实验的|Z|_(0.01 Hz)对应关系。结果表明:4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<湿热<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。
Failure behaviors of the epoxy coating in corrosive media, including Seawater immersion, 3.5% NaCl solution immersion, moist heat and salt spray, were studied with electrochemical impedance spectroscopy(EIS). The correlations of coating resistance |Z|_(0.01 Hz) and 3 types accelerated laboratory experiment and seawater immersion experiments were analyzed. The results indicated that the order of the damaging effect of the four corrosive environments on carbon steel was 3.5% Na Cl solution
Failure behaviors of the epoxy coating in corrosive media, including Seawater immersion, 3.5% NaCl solution immersion, moist heat and salt spray, were studied with electrochemical impedance spectroscopy(EIS). The correlations of coating resistance |Z|_(0.01 Hz) and 3 types accelerated laboratory experiment and seawater immersion experiments were analyzed. The results indicated that the order of the damaging effect of the four corrosive environments on carbon steel was 3.5% Na Cl solution
引文
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[13]MAHDAVIAN M.,ATTAR M.M.Another Approach in Analysis of Paint Coatings with EIS Measurement:Phase Angle at High Frequencies[J].Corrosion Science,2006,48(12):4 152-4 157
[2]王绍明.模拟大气环境加速腐蚀试验的研究[J].装备环境工程,2005,2(4):65-68
[3]郝美丽,曹学军,封先河,等.铝合金室内加速腐蚀与大气暴露腐蚀的相关性[J].兵器材料科学与工程,2006,29(5):28-31
[4]王晶晶,董士刚,叶美琪,等.环氧涂层室外暴晒和室内加速老化试验相关性研究[J].表面技术,2006,35(1):36-39
[5]AMIRUDIN A.,THIERRY D..Application of Electrochemical Impedance Spectroscopy to Study the Degradation of Polymer-coated Metals[J].Progress of Organic Coatings,1995,26(1):1-28
[6]DEFLORIAN F.,FEDRIZZI L.,ROSSI S.,et al..Organic Coating Capacitance Measurement by EIS:Ideal and Actual Trends[J].Electrochimica Acta,1999,44(24):4 243-4 249
[7]MARCHEBOIS H.,KEDDAMB M.,SAVALLA C.,et al..Zinc-rich Powder Coatings Characterisation in Artificial Sea Water:EIS Analysis of the Galvanic Action[J].Electrochimica Acta,2004,49(11):1 719-1 729
[8]谢德明,胡吉明,童少平,等.Zn粉含量及表面沾污对环氧富Zn漆电化学行为的影响[J].金属学报,2004,40(1):103-108
[9]ZUO Y.,PANG R.,LI W.H.,et al..The Evaluation of Coating Performance by the Variations of Phase Angles in Middle and High Frequency Domains of EIS[J].Corrosion Science,2008,50(12):3 322-3 328
[10]张鉴清,曹楚南.电化学阻抗谱方法研究评价有机涂层[J].腐蚀与防护,1998,19(3):99-104
[11]MCINTYRE J.M.,PHAM H.Q..Electrochemical Impedance Spectroscopy:a Tool for Organic Coatings Optimizations[J].Progress of Organic Coatings,1996,27(s1-s4):201-207
[12]谢德明,童少平,胡吉明,等.多道富锌基涂层在Na Cl溶液中的电化学行为研究[J].金属学报,2004,40(7):749-753
[13]MAHDAVIAN M.,ATTAR M.M.Another Approach in Analysis of Paint Coatings with EIS Measurement:Phase Angle at High Frequencies[J].Corrosion Science,2006,48(12):4 152-4 157