Effect of phosphate additive on the morphology and anti-corrosion performance of plasma electrolytic oxidation coatings on magnesium-lithium alloy

被引：68
|
作者：
Li, Zhijun [1 ]
Ren, Qinghui [1 ]
Wang, Xuexia [1 ]
Kuang, Qing [1 ]
Ji, Debin [1 ]
Yuan, Ruixia [1 ]
Jing, Xiaoyan [2 ]
机构：
[1] Northeast Petr Univ, Prov Key Lab Oil & Gas Chem Technol, Coll Chem & Chem Engn, Daqing 163318, Peoples R China
[2] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Heilongjiang, Peoples R China
来源：
CORROSION SCIENCE | 2019年 / 157卷
关键词：
Alloy; SEM; EIS; Oxide coatings; Pitting corrosion; MG-LI ALLOY; CORROSION-RESISTANCE; OXIDE-FILMS; SILICATE; TITANIUM; MICROSTRUCTURE; TEMPERATURE; MECHANISMS; STRENGTH; BEHAVIOR;
D O I：
10.1016/j.corsci.2019.06.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The widespread use of magnesium-lithium (Mg-Li) alloys is frequently hampered by the grand challenge associated with their high propensity to corrosion. Herein, we describe a method to access anti-corrosion coatings on Mg-8.5Li alloy employing plasma electrolytic oxidation (PEO) technique with phosphate additive. Our results reveal the oxide coating has a compact and uniform structure after 10-min PEO treatment, along with higher thickness ((similar to)28 mu m), hardness, and wettability (28 degrees). Electrochemical measurements demonstrate the coating endows a significant enhancement in corrosion resistance for the Mg-8.5Li alloy along with a decent long-term protection for 300 h.
引用
收藏
页码：295 / 304
页数：10
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