三乙醇胺对AZ31镁合金阳极氧化膜微观组织与耐蚀性的影响  

Effects of Triethanolamine on Microstructure and Properties of Anodized Films on AZ31 Magnesium Alloy

作　　者：虢琪 张锋刚[1] 王永善[1] 宋佩维[1] GUO Qi;ZHANG Fenggang;WANG Yongshan;SONG Peiwei(School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,China)

机构地区：[1]陕西理工大学材料科学与工程学院,汉中723000

出　　处：《腐蚀与防护》2021年第11期37-41,共5页Corrosion & Protection

基　　金：陕西省自然科学基础研究计划项目(2018JM5021,2020JQ-871);陕西理工大学科研项目(SLGKY2002);陕西理工大学大学生创新创业训练项目(2020-134)。

摘　　要：采用扫描电镜、光学显微镜、X射线衍射仪和盐雾试验等,研究了三乙醇胺含量对AZ31镁合金阳极氧化膜的微观组织与耐腐蚀性的影响。结果表明:添加三乙醇胺后,AZ31镁合金阳极氧化膜孔隙尺寸减小、组织变得致密,氧化膜厚度增加;三乙醇胺对AZ31镁合金阳极氧化膜的物相结构没有显著影响,AZ31镁合金阳极氧化膜均由MgO相和Mg;SiO;相组成;三乙醇胺使阳极氧化膜耐蚀性提高,添加30 g/L三乙醇胺后,镁合金阳极氧化膜具有较好的耐腐蚀,耐蚀性的提高与氧化膜表面孔隙尺寸和致密性有关。The effects of triethanolamine concentration on the microstructure and corrosion resistance of the anodized films on AZ31 magnesium alloy were studied by scanning electron microscopy, optical microscopy, X-ray diffraction and salt-spray testing. The results show that after addition of triethanolamine, the sizes of micro-pores in the anodized films of AZ31 magnesium alloy became smaller, the structure became more compact, and the thickness of anodized films increased. Triethanolamine had no significant effect on the phase structure of anodized films on AZ31 magnesium alloy, and the anodized films on AZ31 magnesium alloy were all consisted of MgO phase and Mg;SiO;phase. The corrosion resisitance of anodized films was improved by the addition of triethanolamine, and the anodized films on AZ31 magnesium alloy with 30 g/L triethanolamine had better corrosion resistance. The improvement of corrosion resistance was related to the pore size and compactness of the anodized films.

关 键 词：AZ31镁合金 三乙醇胺 阳极氧化膜 相结构 耐蚀性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]