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Preparation and corrosion resistance of a Zn-rich-intermetallic/LDH composite coating on the AZ61 magnesium alloy

文献类型：期刊论文

作者Gao, Wenke2,5,6; Lu, Dongzhu1,4,6; Wang, Huachuan2,5; Jiang, Quantong6; Li, Jiawei6; Qin, Haiyang2,5,6; Li, Chaoqun3,6; Huang, Yanliang6
刊名SURFACES AND INTERFACES
出版日期2025-11-01
卷号76页码:17
关键词AZ61 magnesium alloy LDH Corrosion resistance Zn-rich coating Thermal diffusion
ISSN号2468-0230
DOI10.1016/j.surfin.2025.107960
通讯作者Lu, Dongzhu(ldz@qdio.ac.cn) ; Wang, Huachuan(hcwang@hrbeu.edu.cn)
英文摘要This study proposes an innovative approach for fabricating a surface diffusion alloyed layer (SDA) - layered double hydroxide (LDH) composite coating on AZ61 magnesium alloy. By integrating powder thermal diffusion alloying with a subsequent hydrothermal process, a dense and uniform Zn-Al LDH film was successfully grown in situ on the Zn-rich SDA intermetallic layer. The micro-rough morphology of the SDA layer not only markedly facilitates the heterogeneous nucleation and growth of LDH but also allows for structural and compositional modulation (via Zn incorporation), leading to a unique composite architecture that cannot be achieved through conventional direct-deposition methods. The resulting composite coating exhibits superior corrosion resistance in 3.5 wt% NaCl solution, with the corrosion current density reduced by three orders of magnitude and the impedance modulus enhanced by nearly 50 times compared with the bare AZ61 substrate. Furthermore, the coating demonstrates a water contact angle of 109 degrees. This work achieves a synergistic enhancement of adhesion, corrosion resistance, and hydrophobicity in the SDA-LDH composite coating, offering both a novel design paradigm and an effective strategy for advanced surface protection of magnesium alloys.
WOS关键词DOUBLE HYDROXIDES FILMS ; MG ALLOY ; AZ31 ; AL ; PROTECTION ; BEHAVIOR ; PROGRESS
资助项目National Natural Science Foundation of China[42376209] ; Program of China-Sri Lanka Joint Center for Water Technology Research and Demonstration by the Chinese Academy of Sciences (CAS)[121311KYSB20210005] ; China-Sri Lanka Joint Center for Education and Research by the CAS ; Provincial Natural Science Foundation of Shandong, China[ZR2023ME056] ; Fundamental Research funds for the Central Universities, China[3072025YC0402] ; Wenhai Program of the S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao), China[2021WHZZB2302]
WOS研究方向Chemistry ; Materials Science ; Physics
语种英语
WOS记录号WOS:001612608200004
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/203761]  
专题海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者Lu, Dongzhu; Wang, Huachuan
作者单位1.Qingdao Marine Sci & Technol Ctr, Qingdao 266200, Peoples R China
2.Harbin Engn Univ, Qingdao Innovat & Dev Base, Qingdao 266000, Peoples R China
3.Qilu Univ Technol, Shandong Acad Sci, Sch Mat Sci & Engn, Jinan 250353, Peoples R China
4.Guangxi Acad Sci, Guangxi Key Lab Marine Environm Sci, Nanning 530007, Peoples R China
5.Harbin Engn Univ, Coll Intelligent Syst & Engn, Harbin 150000, Peoples R China
6.Chinese Acad Sci, Inst Oceanol, State Key Lab Adv Marine Mat, Key Lab Marine Environm Corros & Biofouling, Qingdao 266000, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Wenke,Lu, Dongzhu,Wang, Huachuan,et al. Preparation and corrosion resistance of a Zn-rich-intermetallic/LDH composite coating on the AZ61 magnesium alloy[J]. SURFACES AND INTERFACES,2025,76:17.
APA Gao, Wenke.,Lu, Dongzhu.,Wang, Huachuan.,Jiang, Quantong.,Li, Jiawei.,...&Huang, Yanliang.(2025).Preparation and corrosion resistance of a Zn-rich-intermetallic/LDH composite coating on the AZ61 magnesium alloy.SURFACES AND INTERFACES,76,17.
MLA Gao, Wenke,et al."Preparation and corrosion resistance of a Zn-rich-intermetallic/LDH composite coating on the AZ61 magnesium alloy".SURFACES AND INTERFACES 76(2025):17.

入库方式： OAI收割

来源：海洋研究所

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