摘要
利用微弧氧化技术在ZL205A铝合金表面制备陶瓷层;用扫描电镜对膜层形貌及结构进行观察,分析了膜层典型形貌的形成过程;用X射线衍射仪对膜层相组成进行分析;对不同厚度微弧氧化膜层的试样进行盐雾试验。结果表明:所制得的膜层由α-Al2O3、γ-Al2O3及δ-Al2O3组成;膜层厚度小于30μm时,耐蚀性能随着膜层厚度的增大提高明显,当膜厚为30～50μm时,耐蚀性能随着膜厚的增加提高幅度减小,膜厚大于50μm时,其耐蚀性能变化不明显。
A ceramic layer was prepared on the surface of ZL205A alloy by micro-arc oxidation process.The morphology and structure of the ceramic layer was observed.The forming process of typical pattern and structure,and the phase structure of the ceramic layer was analyzed by XRD.Salt spray test was carried out on samples of micro-arc oxidation layer with different thickness.The results show that the ceramic layer is composed of α-Al2O3,γ-Al2O3 and δ-Al2O3.The corrosion resistance is apparently improved with the increase of layer＇s thickness when the layer thickness is less than 30 μm.Corrosion resistance is less improved with the increase of layer＇s thickness when the layer thickness is 30～50 μm.The change of corrosion resistance is not obvious when the layer＇s thickness is greater than 50 μm.
出处
《热加工工艺》
CSCD
北大核心
2011年第2期131-133,共3页
Hot Working Technology
关键词
微弧氧化
陶瓷层
硬度
耐蚀性能
micro-arc oxidation
ceramic layer
hardness
corrosion resistance
