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
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。
自修复涂层
缓蚀剂
惨杂
layered double hydroxides
self-healing coating
corrosion inhibitor
doping
Abstract
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.
中图分类号 TG174 DOI 10.11973/fsyfh-201708007
所属栏目 试验研究
基金项目 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）
收稿日期 2016/12/23
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联系人作者陈哲(liu0827@126.com)
引用该论文: LIU Yanmei,ZHANG Cunliang,CHEN Zhe. Corrosion Resistance of Self-healing Coating doped with 2-Mercaptobenzimidazoleanions Intercalating Zn-Al Layered Double Hydroxides[J]. Corrosion & Protection, 2017, 38(8): 602
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【10】STIMPFLING T,LEROUX F,HINTZE-BRUENING H. Phosphate-based organic molecules interleaved with layered double hydroxide:unraveling the roles of host cations and the guest-inhibiting effect in aluminum corrosion protection[J]. European Journal of Inorganic Chemistry,2012,2012(32):5396-5404.
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【13】MOGGRIDGE G D,PARENT P,TOURILLON G. A NEXAFS study of the orientation of benzoate intercalated into a layer double hydroxide[J]. Physica B:Condensed Matter,1995,208:269-270.
【14】VILLEGAS J C,GIRALDO O H,LAUBERNDS K,et al. New layered double hydroxides containing intercalated manganese oxide species:synthesis and characterization[J]. Inorganic Chemistry,2003,42(18):5621-5631.
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