期刊
JOURNAL OF MAGNESIUM AND ALLOYS
卷 11, 期 4, 页码 1367-1380出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2021.07.027
关键词
Mg alloy; Composite coating; Metal -organic framework; Corrosion resistance; Superhydrophobicity
This study investigated a method to grow a zinc-based metal-organic framework (MOF) composite coating directly on the surface of a magnesium alloy using a micro-arc oxidation layer as a transition layer. The results showed that the superhydrophobic composite coating exhibited strong hydrophobicity and self-cleaning properties, which prevented the penetration of water and corrosive ions into the surface of the magnesium alloy, thereby greatly improving its corrosion resistance.
Mg alloys are considered the most promising engineering materials because of their unique properties. However, the uncontrolled corrosion rate of these alloys limits their applications. Therefore, in this study, a micro-arc oxidation layer was used as a transition layer to directly grow a zinc-based metal-organic framework (MOF) composite coating on the surface of a Mg alloy (AZ91D). Herein, the two zeolitic imidazolate framework (ZIF-8) coatings with different morphologies were separately prepared by homologous metal oxide induction and a one-step in-situ growth method. The superhydrophobic composite coating showed strong hydrophobicity and self-cleaning properties, which could prevent the penetration of water and corrosive ions (Cl -) into the surface of AZ91D. Electrochemical tests demonstrated that the super-hydrophobic composite coatings greatly enhanced the corrosion resistance of AZ91D, and the corrosion current density decreased from 10 -5 to 10-9 A/cm2. These results indicate that the ZIF-8 coatings are beneficial for improving the hydrophobicity and enhancing the corrosion resistance of Mg alloys. Therefore, MOF composite coatings provide a new strategy that can be used to prepare multifunctional anticorrosion coatings on metal substrates. (c) 2021 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据