负载缓蚀剂的微米容器对涂层防腐性能的影响

Effect of microcontainer loading with corrosion inhibitor on corrosion protection of coating

采用水热法合成了氧化锌中空微米球(ZHM),通过扫描电子显微镜(SEM)、X射线衍射(XRD)对其进行形貌及晶体结构的表征,以浸渍法将苯并三氮唑负载到ZHM中,得到负载了苯并三氮唑的氧化锌中空微米球(ZHM-BTA),并通过红外光谱(FT-IR)对其进行了表征。将ZHM-BTA加入到环氧树脂中,在铜基体上制备了功能涂层,利用动电位极化曲线和交流阻抗谱考察了ZHM-BTA对涂层缺陷处金属腐蚀的作用。结果表明,向涂层中掺杂ZHM–BTA可以阻止涂层缺陷引起的腐蚀,ZHM–BTA对涂层缺陷具有一定的愈合作用。

ZnO hollow microspheres （ZHM） were synthesized by hydrothermal method. The morphology and crystal structure of ZHM were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The ZHM containing benzotriazole （ZHM-BTA） was obtained by loading BTA to ZHM using impregnation method, and then characterized by Fourier transform infrared spectroscopy （FT-IR）. A functional coating was prepared on the surface of copper substrate by adding the ZHM-BTA to epoxy resin. The effect of ZHM-BTA on metal corrosion caused by coating defect was studied by potentiodynamic polarization curve measurement and electrochemical impedance spectroscopy （EIS）. It was found that the corrosion caused by coating defect is inhibited by doping ZHM-BTA into epoxy coating, and the ZHM-BTA has certain healing effect for coating defect.