Corrosion Behavior of PEO Coatings Formed on AZ31 Alloy in Phosphate-Based Electrolytes with Calcium Acetate Additive

被引：8
|
作者：
Ziyaei, E. [1 ]
Atapour, M. [1 ]
Edris, H. [1 ]
Hakimizad, A. [1 ]
机构：
[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2017年 / 26卷 / 07期
关键词：
additive; calcium acetate; corrosion; EIS; magnesium alloys; plasma electrolytic oxidation (PEO); unipolar; AM50 MAGNESIUM ALLOY; IN-VITRO; MG ALLOY; OXIDATION COATINGS; CERAMIC COATINGS; BIOMEDICAL APPLICATIONS; TI6AL4V ALLOY; BIPOLAR MODES; PLASMA; PERFORMANCE;
D O I：
10.1007/s11665-017-2765-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The PEO coating started on magnesium AZ31 using a unipolar DC power source. The coating was generated in the electrolyte based on Na3PO4 center dot 12H(2)O and KOH with calcium acetate as additive. The x-ray diffraction method showed some phases containing calcium and phosphate, which was created in the presence of additive. Also, the EDS tests of the sample's surfaces proved the existence of calcium on the surface. Based on the electrochemical tests results, the most corrosion resistance belongs to the sample with calcium acetate additive. In fact, the results of the EIS tests showed the coating with calcium acetate has the highest resistance but the lowest capacitance. However, this state belongs to the surface morphology, the lower porosity, and surface chemical composition.
引用
收藏
页码：3204 / 3215
页数：12
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