| YE Jun,DU Nan,WANG Li-qiang,YIN Mao-sheng,ZHOU Guo-hua,WANG Shuai-xing.Preparation and Properties of Fluoride-Phosphate Conversion Coating Formed on Titanium Alloy[J],44(2):38-42 |
| Preparation and Properties of Fluoride-Phosphate Conversion Coating Formed on Titanium Alloy |
| Received:October 14, 2014 Revised:February 20, 2015 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2015.02.008 |
| KeyWord:titanium alloy conversion coating friction coefficient adhesion |
| Author | Institution |
| YE Jun |
National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| DU Nan |
National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
| WANG Li-qiang |
Chengdu Aircraft Industrial Group Co. , Chengdu , China |
| YIN Mao-sheng |
Chengdu Aircraft Industrial Group Co. , Chengdu , China |
| ZHOU Guo-hua |
Chengdu Aircraft Industrial Group Co. , Chengdu , China |
| WANG Shuai-xing |
National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang , China |
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| Abstract: |
| Objective A chemical conversion technique was researched to enhance the protective ability of titanium alloy surface and the adhesion between titanium alloy and organic coating. Methods The preparation technique of fluoride-phosphate conversion coating formed on TC1 alloy was determined by the single-factor experiments. The microstructure and composition of conversion coating were analyzed by SEM, EDS and XRD. Besides, the related properties of the conversion coating were researched. Results A uniform, coherent and gray conversion coating could be obtained on the surface of TC1 alloy when Na3PO4, NaF, Acidity Regulator A, pH and temperature were 40 g/ L, 15 g/ L, 25 mL/ L, 4. 4 ~4. 6 and 30 ℃, respectively. The microstructure of the coating showed many small spherical grains. The main phase components were Na3TiOF5 and Na2TiF6. The friction coefficient of the fluoride-phosphate conversion coating was only 0. 3 ~0. 5, which was significantly lower than that of TC1 alloy. The dry adhesion level between conversion coating and TB06-9 organic coating was 0, and the wet adhesion level after 48 h immersion could still reach 1, both were far better than those of the TC1 alloy substrate. Conclusion Fluoride-phosphate conversion coating could reduce the friction coefficient TC1 titanium alloy, and improve the adhesion between TC1 alloy and organic coating. |
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