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采用扫描电子显微镜、X射线衍射仪、接触角测量仪、粗糙度轮廓仪等仪器研究了碱处理浓度对钛合金表面形貌、物相、润湿性、粗糙度的影响。结果表明,当碱液浓度为8 mol/L时,可得到在凝胶层不产生裂纹情况下的最大的表面微观窝状网孔孔洞,并获得小的接触角,且表面粗糙度Ra与粗糙度因子γ取得最大值;当碱液浓度大于4 mol/L以上适合处理钛合金基体,表面生成钛酸纳凝胶。综合表面形貌、物相、润湿性、粗糙度等分析,确定浓度为8 mol/L为最佳的碱预处理浓度。
The effects of alkali concentration on the morphology, phase, wettability and roughness of titanium alloy were studied by using scanning electron microscopy, X-ray diffraction, contact angle measuring instrument and roughness profiler. The results show that when the concentration of alkali solution is 8 mol / L, the largest mesoporous mesopore voids can be obtained without any crack in the gel layer, and a small contact angle is obtained, and the surface roughness Ra and roughness The maximum value of degree factor γ was obtained. When the concentration of lye was more than 4 mol / L, it was suitable for the treatment of titanium alloy matrix and the nano-titanate gel was formed on the surface. According to the analysis of surface morphology, phase, wettability and roughness, the optimal concentration of alkali pretreatment at 8 mol / L was determined.