摘要
以硅酸钠(Na2SiO3)和钨酸钠(Na2WO4)为电解质在TC11钛合金表面生成一层微弧氧化膜。使用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和显微硬度测试仪等观察涂层表面形貌和横截面形貌以及内外陶瓷膜层的显微硬度。结果表明,与基体钛合金相比,当电流密度为9 A/dm2,膜层的显微硬度得到提高,但附着力有所降低。此外,在3.5%NaCl和30%H2SO4溶液中比较分析了膜层的电化学腐蚀和一般腐蚀,当电流密度为9 A/dm2时,在30%H2SO4溶液中的膜层具有较低的自腐蚀电流密度。最后,通过SiC和膜层的对磨实验研究了膜层的磨损机理。
The micro-arc oxidation coating was prepared on TC11 sample using sodium silicate(Na2SiO3) and sodium tungstate(Na2WO4) as electrolytes.Scanning electron microscopy(SEM),X-ray diffraction(XRD),and micro-hardness tester were used to analyze the coating surface and cross-sectional morphology and micro-hardness of the inner and outer ceramic coating.The results show that at 9 A/dm2 current density,the optimal coating has an improved micro-hardness but the adhesion decreases compared to that of the pristine Ti substrate.The electrochemical corrosion and general corrosion of the coating were comparatively analyzed in 3.5% NaCl and 30% H2SO4 solution.When the current density is 9 A/dm2,the coating obtained in the 30% H2SO4 solution has a lower self-corrosion current density.Finally,the wear mechanism of the coating was studied by the anti-wear experiment with SiC.
作者
杨眉
唐宁
陈劲
黄婷玉
杨洪浪
刘洋
王丹
刘伟
Yang Mei;Tang Ning;Chen Jin;Huang Tingyu;Yang Honglang;Liu Yang;Wang Dan;Liu Wei(Southwest Petroleum University,Chengdu 610500,China;Sichuan Oil and Gas Construction Engineering Company,Chengdu 610500,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2020年第2期404-411,共8页
Rare Metal Materials and Engineering
关键词
钛合金
微弧氧化
耐磨性
耐腐蚀性能
titanium alloy
micro-arc oxidation
wear resistance
corrosion resistance
