摘要
目的制备一种石墨烯基导电防腐涂料,评价和分析涂料的长效防腐机理和导电机制。方法以环氧树脂为主要成膜物质,通过导电填料和防腐填料搭配并配方优化,制备新型石墨烯导电防腐涂料。通过基本性能的检测、电化学工作站测试、中性盐雾实验、实地埋样试验及大电流冲击实验,探究导电防腐涂层的防腐机理和失效衍化过程,并考察涂层的电气性能。结果制备的导电防腐涂料不仅基本性能(附着力、耐冲击性及涂层结合强度)优异,还具有优异的耐水、耐中性盐雾和耐化学品性,经盐雾实验1500h测试后,涂层完整且湿附着力仍表现良好。电化学系统测试表明,在3.5%NaCl溶液中浸泡60 d后,涂层仍具有较好的防护性能。涂层的体积电阻率和表面接触电阻分别为0.21??cm和6.32??cm2。经5 kA大电流冲击试验5次后,未发现涂层开裂、剥落和烧毁等情况,表明若干次大电流冲击对导电防腐涂层无明显影响。结论该配方的导电防腐涂料具有较好的耐蚀性及电气性能。
The work aims to prepare a new type of graphene based conductive anti-corrosive coating and evaluate and analyze the long-term anti-corrosive mechanism and conductive mechanism of this coating.A new type of graphene conductive anti-corrosive coating was prepared with epoxy resin as the main substance to form the film by matching and formulating conductive fillers and anti-corrosive fillers.The anti-corrosive mechanism and failure process of conductive anti-corrosive coating were investigated by testing of basic properties of coating,electrochemical workstation test system,neutral salt spray test,test of buried samples in actual soil and high current impulse test and the electrical performance of the coating was also studied.The prepared coating had excellent anti-corrosive performance(adhesion,impact resistance,adhesive strength),excellent water resistance,neutral salt spray resistance and chemical resistance.The coating surface was still intact and had the good wet adhesion after the 1500 hours salt spray experiment.From the electrochemical system test,the coating/Q235 carbon steel still exhibited good protective performance after immersed in 3.5wt%NaCl solution for 60 days.The volume resistivity and surface contact resistivity of the coatings were 0.21Ω·cm and 6.32Ω·cm^2 respectively.There was no cracking,peeling or burning of the coating after it was subjected to a 5 kA high-current impulse test for 5 times.There was no significant effect on the conductive anti-corrosive coating after several impacts by high current.The conductive anti-corrosive coating designed by this formula shows good anticorrosion performance and electrical properties.
作者
陈科锋
方云辉
周开河
李鹏
管金胜
蔡辉
涂齐勇
张兆德
蒲吉斌
刘栓
王立平
CHEN Ke-feng;FANG Yun-hui;ZHOU Kai-he;LI Peng;GUAN Jin-sheng;CAI Hui;TU Qi-yong;ZHANG Zhao-de;PU Ji-bin;LIU Shuan;WANG Li-ping(School of Naval Architecture and Mechanical-electrical Engineering,Zhejiang Ocean University,Zhoushan316022,China;Key Laboratory of Marine Materials and Related Technologies,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technologies and Engineering,Chinese Academy of Sciences,Ningbo315201,China;Ningbo Power Supply Company of State Grid Zhejiang Electric Power Corporation,Ningbo315201,China;Chinese People's Liberation Army 63790 Troops,Wenchang571333,China)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2018年第12期246-254,共9页
Surface Technology
基金
青岛海洋科学与技术国家实验室2016年度开放基金(QNLM2016ORP0409)
国网浙江省电力公司科学技术项目(5211DS16001N,5211NB16000F)。
关键词
导电防腐涂层
石墨烯
大电流
电化学
耐蚀性
电气性能
conductive anti-corrosive coatings
graphene
high current impulse
electrochemical
corrosion resistance
electrical performance
