掺杂了插层2-巯基苯并咪唑Zn/Al层状双氢氧化物自修复涂层的耐蚀性  

Corrosion Resistance of Self-healing Coating doped with 2-Mercaptobenzimidazoleanions Intercalating Zn-Al Layered Double Hydroxides

作　　者：柳彦梅[1] 张存良 陈哲[2] LIU Yanmei ZHANG Cunliang CHEN Zhe(Shangqiu Medical College, Shangqiu 476000, China Shangqiu Polytechnic, Shangqiu 476000, China)

机构地区：[1]商丘医学高等专科学校,商丘476000 [2]商丘职业技术学院,商丘476000

出　　处：《腐蚀与防护》2017年第8期602-607,共6页Corrosion & Protection

基　　金：河南省科技攻关计划(152102210219);河南省高校重点科研项目(16B480001);商丘市科技攻关计划(153007)

摘　　要：通过离子交换法制备出了插层2-巯基苯并咪唑(MBI)的Zn/Al层状双氢氧化物(Zn-Al(MBI)LDHs),采用电化学阻抗和人工划痕研究了掺杂了Zn-Al(MBI)LDHs涂层的自修复性能和耐蚀性。结果表明:缓蚀剂MBI分子结构中的苯环平面平行或略有倾斜地置于LDHs的层间;所制备的LDHs实现了MBI的自主释放,同时吸收氯离子;与未掺杂Zn-Al(MBI)LDHs涂层相比,掺杂Zn-Al(MBI)LDHs的涂层表现出优异的耐蚀性,这应归功于从Zn-Al(MBI)LDHs释放出来的缓蚀剂。The 2-mercaptobenzimidazole（MBI）anions intercalating Zn-Al layered double hydroxides[Zn-Al（MBI）LDHs]were successfully prepared by the anion-exchange method for the first time.The self-healing property and corrosion resistance of the coating doped with Zn-Al（MBI）LDHs were investigated by electrochemical impedance spectroscopy（EIS）and artificial scratches.The results showed that the benzene ring of MBI adopted a horizontal or declining orientation in the LDHs interlayer.The prepared LDHs actively released the inhibitor and absorbed Cl-.The sol-gel coating doped with the Zn-Al（MBI）LDHs displayed excellently anticorrosive performance compared to the undoped sol-gel coating,due to the release of corrosion inhibitor from the Zn-Al（MBI）LDHs.

关 键 词：层状双氢氧化物 自修复涂层 缓蚀剂 惨杂 

分 类 号：TG174[金属学及工艺—金属表面处理]