| ZHOU Li-jun,ZHAO Qing,DU Nan,WU Jian-yun,ZHANG Qing-he,HU Yan-qing.Adjustment and Regeneration of Chemical Milling Solution for TC4 Titanium Alloy[J],47(4):190-195 |
| Adjustment and Regeneration of Chemical Milling Solution for TC4 Titanium Alloy |
| Received:September 07, 2017 Revised:April 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.04.028 |
| KeyWord:chemical milling milling solution titanium ion precipitation potassium fluotitanate circulation regeneration |
| Author | Institution |
| ZHOU Li-jun |
Key Discipline Laboratory for National Defense in Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| ZHAO Qing |
Key Discipline Laboratory for National Defense in Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| DU Nan |
Key Discipline Laboratory for National Defense in Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| WU Jian-yun |
Key Discipline Laboratory for National Defense in Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| ZHANG Qing-he |
Key Discipline Laboratory for National Defense in Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| HU Yan-qing |
Manufacturing and Engineering Department of Chengdu Aircraft Industrial Group Co., Ltd, Chengdu , China |
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| Abstract: |
| The work aims to study removal method of titanium ion in the titanium alloy corrosion solution, and to provide theoretical approaches for the chemical milling solution circulation and regeneration. The excess titanium ion was removed by adding precipitant to the chemical milling solution of titanium alloy. The removal effect of titanium ion was characterized by ultraviolet spectrophotometer. The composition and microstructure of the precipitate were studied by scanning electron microscopy, electronic differential system and X-ray diffraction analysis. The chemical milling ability of the circulating solution was detected by adjusting the filtrate components. When the titanium ion reached 70~90 g/L in the chemical milling solution, metal ions led to solution viscosity and deterioration of solution corrosion processing performance. The chemical milling solution was difficult to continue to dissolve titanium alloy. When salt was added to the solution, the removal rate of titanium ions in the solution was the highest and up to 90% when potassium fluoride was added. The washed and dried titanium ion precipitate was detected to be pure potassium fluorine crystal. The chemical milling performance could be restored by adding acid and additives and the chemical milling speed and the surface roughness of the sample met the industrial requirements. The titanium alloy chemical milling solution can be recycled by readjusting the precipitant titanium ion, thereby improving the service life of the chemical milling solution and reducing the pollutant emission. |
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