摘要
在已优化的Na2SiO4-Na3PO4复合体系溶液中加入Al2O3粉末对AZ91D镁合金进行了微弧氧化处理。用SEM、XRD分析了加入Al2O3粉末对陶瓷膜的形貌特征和相成分的影响。结果表明,加入Al2O3粉末后陶瓷膜孔洞减少,且疏松层变得紧实;膜层相成分增加了Al2O3。在3.5%NaCl溶液中的电化学腐蚀试验表明,加入Al2O3粉末后陶瓷膜的耐蚀性有很大提高。
AZ91D magnesium alloy was treated by micro-arc oxidation （MAO） in the optimized composite solution of silicate-phosphate system in which Al2O3 powders were added.Morphological characteristic and phase constituent of ceramic coatings were analyzed using the scanning electron microscope （SEM） and the x-ray diffraction （XRD）.The results showed that after adding Al2O3 powders pores in ceramic coatings decreased and the loose layer became more compact,new phase of Al2O3 appeared.Electrochemical corrosion experiments in 3.5% NaCl solution showed that corrosion resistance of ceramic coatings after adding Al2O3 powders was also improved greatly.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2007年第4期202-205,共4页
Journal of Chinese Society For Corrosion and Protection
基金
山西省教委科技开发项目(20041214)
山西省自然基金(20041065)
关键词
镁合金
Al2O3粉末
微弧氧化
形貌特征
相成分
耐蚀性
magnesium alloy,Al2O3 powders,micro-arc oxidation,morphological characteristic,phase constitution, corrosion resistance
