摘要
用微弧氧化方法在硅酸钠 氢氧化钾电解液体系中制备得到了镁合金氧化膜。考察了反应时间和电流密度对生成氧化物膜层的影响。结果表明 :膜层的生长速度与反应时间密切相关 ,膜层总厚度随反应时间的延长而增加。反应开始阶段 ,膜向外生长速率大于向基体内氧化速率 ,一定时间后 ,膜层增厚以向内生长为主。电流密度对膜层厚度有显著影响 ,随电流密度增大 ,膜层厚度呈近似线性增加 ,表面粗糙度也随之增加。
Oxide coatings were produced on Magnesium alloy surface by microarc oxide in Na 2SiO 3-KOH solution. The influence of reaction time and current density on growing of coatings was investigated. The results show that the coatings' growing rate correlated with the oxidation time. With the increase of oxidation time, the thicknesses of coatings increased. At the initial time of reaction, the growing rate of coating toward the external surface is greater than that toward the substrate. After some time, the increase of coating's thickness is dominated by growing toward the inner. The current density influenced on the coating thickness evidently. The thickness increased linearly with the current density, along with the surface roughness increased.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2005年第2期262-265,共4页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目 (50 32 30 0 7) (50 2 71 0 80 )
国家 863资助项目 (2 0 0 3AA30 5670 )
中科院百人计划资助项目
关键词
镁合金
微弧氧化
氧化膜
反应时间
电流密度
magnesium alloy
microarc oxidation
oxide coatings
reaction time
current density
