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采用两种不含氢氟酸或氟化物的溶液(ⅰ过氧化氢和硫酸,ⅱ过氧化氢和氢氧化钠)对比研究钛合金阳极氧化膜的退除行为。采用扫描电镜和拉曼光谱分析氧化膜退除前后的形貌和结构,采用原子力显微镜表征样品表面三维形貌和粗糙度。结果表明:氧化膜均能被这两种溶液退除,但溶液ⅰ退除后表面会有残余氧化物。两种退膜方法均明显受钛合金基体微观结构的影响,条状α相和β相较易受溶液ⅰ影响,而等轴α相更易被溶液ⅱ溶解。溶液ⅱ退除后的表面明显比溶液ⅰ退除后的表面平整。相对于ⅰ,溶液ⅱ更环保,效果更好。
Two types of hydrofluoric acid-free or fluoride-containing solutions (i hydrogen peroxide and sulfuric acid, ii hydrogen peroxide and sodium hydroxide) were used to study the titanium alloy anodic oxide film removal behavior. Scanning electron microscopy and Raman spectroscopy were used to analyze the morphology and structure of the oxide film before and after its removal. The three-dimensional morphology and roughness of the sample surface were characterized by atomic force microscopy. The results show that the oxide film can both be removed by these two solutions, but the residual oxide will be found on the surface after solution i is removed. The two methods are obviously affected by the microstructure of the titanium alloy substrate, strip α and β are more susceptible to solution i, while the isophane α phase is more soluble in solution ii. The surface of the solution ii after the withdrawal was significantly smoother than the surface after the solution i was removed. Relative to ⅰ, solution ⅱ more environmentally friendly, the effect is better.