腐蚀
材料科学
介电谱
锌
金属
电化学
合金
多孔性
化学工程
缓蚀剂
极化(电化学)
冶金
复合材料
化学
电极
工程类
物理化学
作者
Baohui Ren,Yanning Chen,Yanqiang Li,Weijin Li,Shuiying Gao,Hongfang Li,Rong Cao
标识
DOI:10.1016/j.cej.2019.123389
摘要
The unique porous characteristic of metal-organic frameworks (MOFs) has been attracting significant attention for gas storage, catalysis and drug delivery. However, the studies regarding loading inhibitors into MOFs for metallic anti-corrosion applications are scarcely reported. Herein, a strategy based on encapsulating corrosion inhibitors into MOFs matrix has been developed, and their corrosion process and mechanism have been fully studied. Specifically, an environmentally friendly green corrosion inhibitor, zinc gluconate (ZnG), was selected as a metal resource for the preparation of ZIF-8 and then inherently intercalated into the porous ZIF-8. Various characterizations were carried out to confirm that zinc gluconate was successfully loaded into the ZIF-8 matrix. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves show the evidence that the prepared [email protected]/EP coatings display good metallic anti-corrosion performances. The probably protecting mechanism of [email protected]/EP coatings for magnesium alloy surface was thoroughly discussed.
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