材料科学
腐蚀
涂层
合金
电化学
镁合金
冶金
镁
复合数
锌
化学工程
转化膜
咪唑酯
复合材料
电极
化学
物理化学
工程类
作者
Runjia Liu,Yan Liu,Qiwen Yong,Zhihui Xie,Liang Wu,Chuan‐Jian Zhong
标识
DOI:10.1016/j.surfcoat.2023.129505
摘要
The long-term corrosion resistance of conventional micro-arc oxidation (MAO) coatings on magnesium alloy is limited by the inherent micro-scale pores. To address this issue, zeolitic imidazolate framework-8 (ZIF-8) and zinc gluconate (ZnG) loaded ZIF-8 ([email protected]) were synthesized and incorporated into the MAO coating. The electrochemical and immersion tests showed that the MAO composite coating doped with ZIF-8 and [email protected] ((ZIF-8 + [email protected])/MAO) displayed optimal corrosion resistance. The corrosion current density (jcorr) of the pristine (ZIF-8 + [email protected])/MAO composite coating (3.38 nA cm−2) is 63.3 times lower than that of the blank MAO coating (214 nA cm−2), indicating the significant enhancement in corrosion protection of the nanoparticle to the coatings. Even after 32 days of immersion in a 3.5 wt.% NaCl solution, the jcorr of the former was as low as 87.3 nA cm−2, much lower than that of the blank MAO coating (1710 nA cm−2). These findings provide new insights into the design of corrosion-resistant MAO composite on magnesium alloy surfaces via the incorporation of inhibitor-loaded ZIF-8 nanocontainers.
科研通智能强力驱动
Strongly Powered by AbleSci AI