Effects of NaAlO<sub>2</sub> Concentration on Microstructure and Performance of Micro-Arc Oxidation Coatings Formed on Magnesium

慕伟意 1; 憨勇 1; 张利民 2

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Effects of NaAlO₂ Concentration on Microstructure and Performance of Micro-Arc Oxidation Coatings Formed on Magnesium

更新时间：2025-12-08

- Effects of NaAlO₂ Concentration on Microstructure and Performance of Micro-Arc Oxidation Coatings Formed on Magnesium
- Vol. 41, Issue 7, Pages: 847-851(2007)
- 作者机构：
  
  西安交通大学金属材料强度国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG174
- Online First：10 July 2007，
  
  Published：2007
- 稿件说明：
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慕伟意 1, 憨勇 1, 张利民 2. Effects of NaAlO₂ Concentration on Microstructure and Performance of Micro-Arc Oxidation Coatings Formed on Magnesium[J]. 2007, 41(7): 847-851.
DOI：

慕伟意 1, 憨勇 1, 张利民 2. Effects of NaAlO₂ Concentration on Microstructure and Performance of Micro-Arc Oxidation Coatings Formed on Magnesium[J]. 2007, 41(7): 847-851. DOI：

摘要

在NaAlO

溶液中于恒压条件下对镁进行了微弧氧化处理

研究了NaAlO

浓度对微弧氧化膜表面形貌、相组成和表面硬度的影响

并对不同NaAlO

浓度下所得的微弧氧化膜的耐蚀性进行了表征.结果表明:随着NaAlO

浓度的升高

微弧氧化膜表面的孔洞明显减少

致密性增强

表面硬度显著提高; 微弧氧化膜主要由MgO和MgAl

相组成

随着NaAlO

浓度的升高

MgAl

相所占的比例逐渐增大; 在质量分数为3.5%的NaCl溶液中

随NaAlO

浓度升高

所得微弧氧化膜的腐蚀电位逐渐增高

表明耐蚀性逐渐增强

与未处理的试样比较

其耐蚀性有较大提高.

Abstract

Ceramic coatings were fabricated on magnesium by micro-arc oxidation(MAO)under constant potential in NaAlO

solution

and the effects of NaAlO

concentration on the surface morphologies

phase composition and surface hardness of the MAO coatings were investigated. Corrosion resistance of the coatings in different NaAlO

concentrations and the untreated magnesium were evaluated with the potentiodynamic polarization tester. The results show that with increasing NaAlO

concentration the micro-pores of MAO coating decrease

while the average surface hardness increases. The MAO coating is mainly composed of MgO and

MgAl

and the content of MgAl

increases with the increasing NaAlO

concentration. With NaAlO

concentration increasing

the corrosion potential of the MAO coating in 3.5% NaCl solution increases. MAO coating enables to effectively improve the corrosion resistance of magnesium.

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references

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⁰

Effects of NaAlO2 Concentration on Microstructure and Performance of Micro-Arc Oxidation Coatings Formed on Magnesium

DOI：

摘要

Abstract

关键词

Keywords

references

Effects of NaAlO₂ Concentration on Microstructure and Performance of Micro-Arc Oxidation Coatings Formed on Magnesium