电解液成分在ZAlSi12Cu2Mg1微弧氧化膜形成中的作用

刘彩文; 刘向东; 吕凯; 乌迪

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电解液成分在ZAlSi12Cu2Mg1微弧氧化膜形成中的作用
Effects of Electrolyte Proportion on MAO（Micro-arc Oxidation） Ceramic Coating on ZAlSi12Cu2Mg1 Alloy
2008年第9期页码：725-727
纸质出版日期： 2008 ，
DOI：

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[1]刘彩文,刘向东,吕凯,乌迪.电解液成分在ZAlSi12Cu2Mg1微弧氧化膜形成中的作用[J].特种铸造及有色合金,2008(09):725-727+655-656.

Liu Caiwen, Liu Xiangdong, L Kai, et al. Effects of Electrolyte Proportion on MAO（Micro-arc Oxidation） Ceramic Coating on ZAlSi12Cu2Mg1 Alloy[J]. Special Casting & Nonferrous Alloys, 2008,(9):725-727.
[1]刘彩文,刘向东,吕凯,乌迪.电解液成分在ZAlSi12Cu2Mg1微弧氧化膜形成中的作用[J].特种铸造及有色合金,2008(09):725-727+655-656. DOI：

Liu Caiwen, Liu Xiangdong, L Kai, et al. Effects of Electrolyte Proportion on MAO（Micro-arc Oxidation） Ceramic Coating on ZAlSi12Cu2Mg1 Alloy[J]. Special Casting & Nonferrous Alloys, 2008,(9):725-727. DOI：

摘要

在电解液组成为Na2SiO3、Na2WO4、NaOH、丙三醇和Na2EDTA下

对ZAlSi12Cu2Mg1微弧氧化陶瓷膜的形成进行研究

通过改变每种成分的含量

研究了其对微弧氧化的临界起弧电压、稳定氧化时间、陶瓷膜层生长速率和陶瓷膜层硬度的影响

并分析其作用原理。结果表明

Na2SiO3和NaOH可极大地促进膜层生长

Na2WO4提高膜层硬度

NaOH能降低临界起弧电压

丙三醇和Na2EDTA均可延长稳定氧化时间并改善微弧氧化的稳定性

通过观察陶瓷膜表面与截面形貌

发现丙三醇和Na2EDTA同时作用可细化膜层陶瓷颗粒

改善膜层与基体的结合

并显著提高陶瓷层的耐磨性。

Abstract

The formation of MAO ceramic coating on ZAlSi12Cu2Mg1 alloy was observed in electrolyte which is composed of NaSiO3

Na2WO4

NaOH

glycerin and Na2EDTA. Effects of different proportions on critical arc starting voltage

stable oxidation time

the forming rate and hardness of coating were analyzed. The results show that NaSiO3 and NaOH can evidently promote the formation of coating

and the Na2WO4 can improve the hardness of coating. Meanwhile

NaOH can decrease the critical arc-starting voltage

and glycerin and Na2EDTA can increase stable oxidation time and improve the stability of MAO. Microstructural observation reveal that the wear resistance of the ceramic coating can be evidently improved in glycerin and Na2EDTA electrolyte as a result of refining ceramic particle in coating and improving the bonding condition of coating and matrix alloy.