Cerium nitrate and stearic acid modified corrosion-resistant micro-arc oxidation coating on magnesium alloy

被引：8
作者：
Liu, Yan [1 ]
Yong, Qiwen [1 ]
Wu, Liang [2 ]
Yu, Gang [3 ]
Xie, Zhi-Hui [1 ]
机构：
[1] China West Normal Univ, Coll Chem & Chem Engn, Chem Synth & Pollut Control Key Lab Sichuan Prov, Nanchong 637002, Peoples R China
[2] Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
[3] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2024年 / 478卷
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; Corrosion; Micro -arc oxidation; Coating; Sealing; SUPERHYDROPHOBIC SURFACE; AZ31; ELECTROLYTE; PROTECTION; ANTIBACTERIAL; FABRICATION; MECHANISMS; TITANIUM; BEHAVIOR; FILMS;
D O I：
10.1016/j.surfcoat.2024.130461
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This paper aims to overcome the adverse influence of intrinsic micropores and microcracks in the micro-arc oxidation (MAO) layer by creating a hydrophobic cerium-based conversion top layer through a vacuumassisted post-treatment. The electrochemical results reveal that the corrosion current density (jc) and impedance modulus at the low-frequency region of the duplex protective coating system are significantly lower and higher than that of the bare magnesium alloy and MAO coating without modification. The unprecedentedly low jc and high impedance of the as-prepared coating are attributed to the notable improvement in hydrophobicity, sealing effect to micropores, and self-healing function of the outer cerium-based film.
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页数：13
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