低共熔溶剂中TC4合金阳极氧化制备高饱和度着色膜

周智鹏; 朱霖; 陆连伍; 夏雯怡; 汝娟坚; 华一新

doi:10.16490/j.cnki.issn.1001-3660.2026.06.018

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表面技术 ›› 2026, Vol. 55 ›› Issue (6) : 241-250. DOI: 10.16490/j.cnki.issn.1001-3660.2026.06.018

功能表面及技术

低共熔溶剂中TC4合金阳极氧化制备高饱和度着色膜

周智鹏, 朱霖, 陆连伍, 夏雯怡, 汝娟坚^*, 华一新

作者信息 +

Preparation of High Saturation Colored Films on TC4 Alloys by Anodic Oxidation in Deep Eutectic Solvents

ZHOU Zhipeng, ZHU Lin, LU Lianwu, XIA Wenyi, RU Juanjian^*, HUA Yixin

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文章历史 +

摘要

目的解决目前Ti-6Al-4V（TC4）合金在水体系电解液中通过阳极氧化着色得到产品颜色种类较少且电解液毒性大的问题。方法本文采用含水的氯化胆碱-乙二醇低共熔溶剂（ChCl-EG-H₂O DES）作为氧化着色电解液,对TC4合金进行着色处理,并对电解液中水含量对着色膜颜色及厚度的影响、着色膜成分、着色后TC4合金耐蚀性能及耐磨性能进行探究。结果在ChCl-EG-H₂O DES中采用恒压法进行阳极氧化可以在10 s内实现钛合金制品的高饱和度均匀着色。TC4合金在0%~100%的水含量下经阳极氧化后能可控呈现出灰、黄、金、橙、棕、紫、蓝等色调,但是当水含量高于15%后着色膜色调开始循环出现。物相检测结果表明：TC4合金表面着色膜的成分主要为TiO₂和Al₂O₃。耐蚀性和耐磨性测试表明：经氧化着色后TC4合金的腐蚀电流密度降低54%,摩擦系数均值由0.37降至0.19。结论通过调整ChCl-EG-H₂O DES电解液中的水含量能够实现更广色域的钛合金氧化着色,并且解决传统电解液毒性大的问题。着色后TC4合金的耐蚀性和耐磨性均得到提升。本文研究方法为钛合金的阳极氧化着色提供了新的思路和环保工艺,为其多样化应用开辟了新的途径。

Abstract

To solve the issue that the product color types obtained by anodic oxidation of Ti-6Al-4V (TC4) alloys in water-based electrolyte are limited and the toxicity of the electrolyte is high, a choline-ethylene glycol-H₂O deep eutectic solvent (ChCl-EG-H₂O DES) is used as the anodic oxidation coloring electrolyte to treat TC4 alloys. The influence of water content in DES on the color and thickness of the oxide film is studied, and the composition of the oxide film, as well as the corrosion resistance and wear resistance of TC4 alloys after coloring treatment are investigated. By using the constant voltage method for anodic oxidation in ChCl-EG-H₂O DES, high saturation and uniform coloring of titanium alloy products can be achieved within 10 s. After anodic oxidation of TC4 alloys at 0% to 100% water content, it can controllably present colors such as gray, yellow, gold, orange, brown, purple, blue, etc. However, when the water content exceeds 15%, the color of the film begins to cycle. Combining chromatographic calculations, it is indicated that the thickness of the oxide film obtained by anodic oxidation of titanium alloy in different water content DES is different. When the water content in DES is 15%, the thickness of the oxide film reaches its maximum value of 100.51 nm. Further increasing the water content causes the thickness of the oxide film to begin to decrease, which is consistent with the phenomenon of color cycling. The phase detection results show that the composition of the coloring film on the surface of TC4 alloys is mainly TiO₂ and Al₂O₃. EDS results show that Ti, Al, V and O are uniformly distributed on the film. When the water content in DES is 15%, the oxygen content increases from 6.2% (untreated titanium alloy) to 14.9% (colored titanium alloy), and then decreases at higher water contents, which is consistent with the trend of thickness. The corrosion resistance and wear resistance tests show that the corrosion current density of TC4 alloys after coloring decreases by 54%, and the average friction coefficient is reduced from 0.37 to 0.19. The 3D optical profilometry measurement shows that the maximum deformation height of the colored titanium alloy is 0.99 μm, while that of the uncolored titanium alloy is 1.16 μm. Although the wear amounts are similar, the deformation amount of the colored titanium alloy is less than that of the uncolored titanium alloy. This indicates that oxidation coloring mainly enhances the shear strength and deformation resistance of the titanium alloy surface, without significantly increasing its hardness. This study can achieve a wider color range of titanium alloy anodic oxidation coloring by adjusting the water content in the ChCl-EG-H₂O DES electrolyte, and solve the problem of high toxicity of the traditional electrolyte. The corrosion resistance and wear resistance of TC4 alloys after coloring have been improved. This research method provides new ideas and environmentally friendly processes for the anodizing coloring of titanium alloys, and opens up new avenues for their diversified applications.

导出引用

周智鹏, 朱霖, 陆连伍, 夏雯怡, 汝娟坚, 华一新. 低共熔溶剂中TC4合金阳极氧化制备高饱和度着色膜[J]. 表面技术. 2026, 55(6): 241-250

ZHOU Zhipeng, ZHU Lin, LU Lianwu, XIA Wenyi, RU Juanjian, HUA Yixin. Preparation of High Saturation Colored Films on TC4 Alloys by Anodic Oxidation in Deep Eutectic Solvents[J]. Surface Technology. 2026, 55(6): 241-250

中图分类号： TB39

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