Effect of Various Additives on Performance of Plasma Electrolytic Oxidation Coatings Formed on AZ31 Magnesium Alloy in the Phosphate Electrolytes

被引：8

作者：

庄俊杰 ^{[1
,2
,3
]}

宋仁国 ^{[1
,2
,3
]}

LI Hongxia ^{[4
]}

XIANG Nan ^{[1
,2
,3
]}

机构：

[1] School of Materials Science and Engineering, Changzhou University

[2] Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University

[3] Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University

[4] College of Materials and Environmental Engineering, Hangzhou Dianzi University

来源：

JournalofWuhanUniversityofTechnology(MaterialsScience) | 2018年 / 33卷 / 03期

关键词：

D O I：

暂无

中图分类号：

TG174.451 [氧化法];

学科分类号：

091004 [生态修复工程学];

摘要：

Plasma electrolytic oxidation（PEO） coatings were prepared on AZ31 magnesium alloy using alkaline phosphate as base electrolyte system, and with the addition of sodium silicate（Na2SiO3）, sodium aluminate（NaAlO2） and potassium fluorozirconate（K2ZrF6） as additives. The microstructure, phase composition and element composition as well as surface profile of the PEO coatings were analyzed by means of scanning electron microscopy（SEM）, X-ray diffraction（XRD）, energy dispersive X-ray spectroscopy（EDS）, and threedimensional（3 D） optical profilometry. The corrosion and wear properties were evaluated by electrochemical potentiodynamic polarization in 3.5 wt% Na Cl solution and ball-on-disc wear tests, respectively. The results showed that the anions of the additives effectively participated in the coating formation influencing its microstructural features, chemical composition, corrosion resistance and tribological behaviour. It was observed that the sample treated by PEO in the electrolyte solution containing K2ZrF6 as an additive showed better corrosion and abrasive resistance.

引用

页码：703 / 709

页数：7

共 24 条

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