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中国腐蚀与防护学报  2012, Vol. 32 Issue (6): 520-524    
  研究报告 本期目录 | 过刊浏览 |
NaOH对铝合金微弧氧化膜特性的影响
吴士军
呼和浩特职业学院生物化学工程学院 呼和浩特 010070
EFFECTS OF NaOH ON CHARACTERISTICS OF COATINGS ON ALUMINUM ALLOY BY MICRO-ARC OXIDIZATION
WU Shijun
College of Biochemistry Engineering, Huhhot Vocational College, Huhhot 010070
全文: PDF(1612 KB)  
摘要: 

Na2SiO3电解液体系下,对ZAlSi12Cu2Mg1微弧氧化膜的形成进行研究,通过改变NaOH的含量,研究了其对电解液的电导率、微弧氧化的临界起弧电压、膜层特性及微观形貌的影响。并测定了氧化膜的相组成。结果表明:NaOH含量从1.0 g/L到3.0 g/L变化时,电解液的电导率由14.00 ms/cm几乎呈线性增大到26.28 ms/cm,正向临界起弧电压由360 V呈线性降低下降到290 V;含量从1.0 g/L增大到2.5 g/L时,膜厚从92 μm迅速增加到125 μm。含量超过2.5 g/L,膜厚减小,致密层所占比例下降。XRD分析表明:氧化膜层中主要由莫来石、SiO2和α-Al2O3γ-Al2O3和WO3相。

关键词 NaOH电导率微弧氧化膜    
Abstract

Forming of ceramic coatings on surface of ZAlSi2Cu2Mg1 by micro-arc oxidization (MAO) in a Na2SiO3 electrolyte was investigated. The influences of content of NaOH on the conductivity of electrolytes, arc starting voltage, thicknesses of ceramic coatings, and morphology of coatings were analyzed respectively. Phase compositions of coatings were analyzed by XRD. The results show that while content of NaOH rises from 1.0 g/L to 3.0 g/L, the conductivity of electrolytes rises from 4.00 ms/cm to 26.28 ms/cm, and arc starting voltage decreases from 360 to 290 V. While the content of NaOH rises from 1.0 g/L to 2.5 g/L, the thickness of coatings increase gradually from 92 to 125 μm. But as the content of NaOH exceeds 2.5 g/L, the thickness and the proportion of compact layer decreases. The XRD result indicated that the coatings are composed of mullite, SiO2, α-Al2O3, γ-Al2O3 and WO3.

Key wordsNaOH    conductivity    micro-arc oxidization coating (MAO)
收稿日期: 2012-05-02     
ZTFLH:  TG174.4  
基金资助:

内蒙古自治区高等学校科学研究项目(NJC07188)资助

通讯作者: 吴士军     E-mail: lcwwsj@163.com
Corresponding author: WU Shijun     E-mail: lcwwsj@163.com
作者简介: 吴士军,男,1973年生,讲师,硕士,研究方向为材料性能及制备

引用本文:

吴士军. NaOH对铝合金微弧氧化膜特性的影响[J]. 中国腐蚀与防护学报, 2012, 32(6): 520-524.
WU Shijun. EFFECTS OF NaOH ON CHARACTERISTICS OF COATINGS ON ALUMINUM ALLOY BY MICRO-ARC OXIDIZATION. Journal of Chinese Society for Corrosion and protection, 2012, 32(6): 520-524.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2012/V32/I6/520

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