摘要
在硅酸钠、六偏磷酸钠复合电解液中,采用微弧氧化技术在7075铝合金表面原位生长出氧化铝陶瓷膜,研究了阴/阳极电流密度比对陶瓷膜厚度、表面及截面形貌、相组成及耐蚀性等的影响。结果表明：陶瓷膜的厚度、微观形貌、相组成及含量与阳极电流密度和阴阳极电流密度比密切相关,7075铝合金经微弧氧化处理后腐蚀电流密度降低2～4个数量级,耐腐蚀性能大幅提高。
The ceramic coating was in-situ formed on 7075 aluminum alloy surface by applying micro-arc oxidation technique in sodium silicate and sodium hexametaphosphate solution. The effects of ratio of cathodic current density （Jc） to anodic current density （Jo） on thickness, surface and cross-section morphology, phase composition and corrosion resistance of the ceramic coating were investigated. The results show that the thickness, micro-morphology as well as phase composition and content are closely related to Ja and Jc/Jo. The corrosion resistance of 7075 aluminum alloy is significantly improved after MAO treatment.
出处
《热加工工艺》
CSCD
北大核心
2015年第2期182-185,共4页
Hot Working Technology
基金
广西自然科学基金资助项目(2013GXNSFBA019260)
关键词
微弧氧化
电流密度
陶瓷膜
特性
micro-arc oxidation
current density
ceramic coating
properties
