CN104790016A - Method for preparing ceramic coating on surface of titanium alloy - Google Patents
Method for preparing ceramic coating on surface of titanium alloy Download PDFInfo
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- CN104790016A CN104790016A CN201510156551.1A CN201510156551A CN104790016A CN 104790016 A CN104790016 A CN 104790016A CN 201510156551 A CN201510156551 A CN 201510156551A CN 104790016 A CN104790016 A CN 104790016A
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Abstract
The invention discloses a method for preparing a ceramic coating on a surface of a titanium alloy. The method comprises steps as follows: electrolyte preparation, coating preparation and coating aftertreatment and specifically comprises steps as follows: taking sodium silicate, adding distilled water with a solid-liquid volume ratio of 50-100, stirring until the sodium silicate is completely dissolved, adding sodium dihydrogen phosphate with a sodium silicate weight ratio of 0.3-0.8, stirring until sodium dihydrogen phosphate is completely dissolved, then adding graphite with a sodium silicate weight ratio of 0.1-0.8, and stirring uniformly to obtain an electrolyte; pouring the electrolyte into an electrolytic tank, and putting a to-be-coated titanium alloy material into the electrolyte for micro-arc oxidation to obtain a target object; performing thermal treatment on the target object. The ceramic coating is prepared on the surface of the titanium alloy to make up the deficiency of insufficient anti-corrosion performance of the titanium alloy, the anti-corrosion performance of a titanium alloy part in an acid solution environment is greatly improved, defects of the titanium alloy in an acid environment are overcome, the use time of the titanium alloy material in the acid environment is prolonged, the service life of the part is prolonged, and the production cost is reduced.
Description
Technical field
The invention belongs to chemical technology field, be specifically related to a kind of method of the other ceramic coating at titanium alloy surface.
Background technology
Because having, the feature such as intensity is high, density is little, Young's modulus is low, good biocompatibility is widely used in the fields such as aerospace, boats and ships, petrochemical complex, biomedicine to titanium alloy.Although titanium alloy material is well used in above-mentioned each field, under some a particular job environment, titanium alloy material shows the deficiency of performance, makes its usage space also be subject to certain limitation.As the ball valve, pipeline, tube wall, container etc. prepared by titanium alloy material, even if titanium alloy material has acidic solution resist effect preferably, but under being in acidic solution environment for a long time, titanium alloy material also slowly can be corroded by solution, so the titanium alloy material for some privileged sites should possess stronger corrosion resistance nature, therefore improve the corrosion-resistant particularly important of titanium alloy material, not only increase working efficiency, extend duration of service, largely reduce cost simultaneously.So for titanium alloy material under acidic solution environment, prepare the strong rete of a kind of erosion resistance at material surface by modification technology means, strengthen the erosion resistance of titanium alloy material, extend the work-ing life of material.
Summary of the invention
The object of the present invention is to provide a kind of method preparing ceramic coating at titanium alloy surface.
The object of the present invention is achieved like this, comprises electrolyte quota, preparation, post-processing step, specifically comprise:
A, electrolyte quota: get water glass, add the distilled water of solid-liquid volume ratio 50 ~ 100 times, stirring and dissolving is complete, add the SODIUM PHOSPHATE, MONOBASIC of water glass weight ratio 0.3 ~ 0.8 times again, stirring and dissolving is complete, add the graphite of water glass weight ratio 0.1 ~ 0.8 times again, stir and obtain electrolytic solution;
B, preparation: electrolytic solution is poured in electrolyzer, titanium alloy material to be coated is placed in electrolytic solution differential arc oxidation and obtains target compound;
C, aftertreatment: target compound is heat-treated.
The present invention is directed to the deficiency of titanium alloy corrosion resistance nature, one deck ceramic coating is prepared on its surface, substantially increase the corrosion resistance nature of titanium alloy component under acidic solution environment, compensate for the deficiency of titanium alloy performance under sour environment, improve the duration of service of titanium alloy material under sour environment, extend the work-ing life of part, reduce production cost.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but limited the present invention never in any form, and any conversion done based on training centre of the present invention or replacement, all belong to protection scope of the present invention.
The method preparing ceramic coating at titanium alloy surface of the present invention, comprises electrolyte quota, preparation, post-processing step, specifically comprises:
A, electrolyte quota: get water glass, add the distilled water of solid-liquid volume ratio 50 ~ 100 times, stirring and dissolving is complete, add the SODIUM PHOSPHATE, MONOBASIC of water glass weight ratio 0.3 ~ 0.8 times again, stirring and dissolving is complete, add the graphite of water glass weight ratio 0.1 ~ 0.8 times again, stir and obtain electrolytic solution;
B, preparation: electrolytic solution is poured in electrolyzer, titanium alloy material to be coated is placed in electrolytic solution differential arc oxidation and obtains target compound;
C, aftertreatment: target compound is heat-treated.
Graphite purity described in step A is more than 99.5%.
The power parameter of the differential arc oxidation described in step B is set to: forward current 1 ~ 3A, negative current 0.5 ~ 1A, frequency 100 ~ 1200Hz, forward dutycycle 10 ~ 90%, negative sense dutycycle 10 ~ 90%, time 10 ~ 30min.
Thermal treatment described in step C is that target compound is heated 0.5 ~ 4h at 100 ~ 1300 DEG C.
With embodiment, the present invention will be further described below.
Embodiment 1
5000ml distilled water is added in the beaker of 5000ml, add 75g water glass, after dissolving completely, add 50g SODIUM PHOSPHATE, MONOBASIC again, after SODIUM PHOSPHATE, MONOBASIC is dissolved completely, add 32g high purity graphite stir, pour in electrolyzer, titanium alloy sample is hung in the electrolytic solution, mao power source optimum configurations is forward current 3A, negative current 1A, frequency 1200Hz, forward dutycycle 90%, negative sense dutycycle 10%, oxidization time 20min, after the ceramic layer on surface obtained is cleaned, without heat treated, part has been put into the hydrofluoric acid solution of dilution, after soaking 1.5min, the ceramic layer of piece surface comes off, start to occur bubble.
Embodiment 2
5000ml distilled water is added in 5000ml beaker, add 100g water glass, after dissolving completely, add SODIUM PHOSPHATE, MONOBASIC 30g again, after SODIUM PHOSPHATE, MONOBASIC is dissolved completely, add high purity graphite 10g stir, pour in electrolyzer, titanium alloy sample is hung in the electrolytic solution, mao power source optimum configurations is forward current 1A, negative current 0.5A, frequency 300Hz, forward dutycycle 10%, negative sense dutycycle 90%, oxidization time 10min, after the ceramic layer on surface obtained is cleaned, resistance box is adopted to heat, temperature controls at 100 DEG C, time controling is 2h.After above-mentioned process, part has been put into the hydrofluoric acid solution of dilution, and after soaking 10min, the ceramic layer of piece surface comes off, and starts to occur bubble.
Embodiment 3
The distilled water of 5000ml is added in 5000ml beaker, add 75g water glass, after dissolving completely, add SODIUM PHOSPHATE, MONOBASIC 50g again, high purity graphite 30g is added after SODIUM PHOSPHATE, MONOBASIC is dissolved completely, stir, pour in electrolyzer, titanium alloy component is hung in the electrolytic solution, mao power source optimum configurations is forward current 1.5A, negative current 0.75A, frequency 600Hz, forward dutycycle 50%, negative sense dutycycle 50%, oxidization time 15min, after the ceramic layer on surface obtained is cleaned, resistance box is adopted to heat, temperature controls at 500 DEG C, time controling is 2h.After above-mentioned process, part has been put into the hydrofluoric acid solution of dilution, and after soaking 20min, the ceramic layer of piece surface comes off, and starts to occur bubble.
Embodiment 4
Distilled water is added in 5000ml beaker, add 50g water glass, after dissolving completely, add SODIUM PHOSPHATE, MONOBASIC 40g again, after SODIUM PHOSPHATE, MONOBASIC is dissolved completely, add high purity graphite 40g stir, pour in electrolyzer, titanium alloy component is hung in the electrolytic solution, mao power source optimum configurations is forward current 2.0A, negative current 1A, frequency 900Hz, forward dutycycle 30%, negative sense dutycycle 70%, oxidization time 10min, after the ceramic layer on surface obtained is cleaned, adopt resistance box to heat, temperature controls at 1300 DEG C, and time controling is 0.5h.After above-mentioned process, part has been put into the hydrofluoric acid solution of dilution, and after soaking 16min, the ceramic layer of piece surface comes off, and starts to occur bubble.
Claims (4)
1.
oneplant the method preparing ceramic coating at titanium alloy surface, it is characterized in that comprising electrolyte quota, preparation, post-processing step, specifically comprise:
A, electrolyte quota: get water glass, add the distilled water of solid-liquid volume ratio 50 ~ 100 times, stirring and dissolving is complete, add the SODIUM PHOSPHATE, MONOBASIC of water glass weight ratio 0.3 ~ 0.8 times again, stirring and dissolving is complete, add the graphite of water glass weight ratio 0.1 ~ 0.8 times again, stir and obtain electrolytic solution;
B, preparation: electrolytic solution is poured in electrolyzer, titanium alloy material to be coated is placed in electrolytic solution differential arc oxidation and obtains target compound;
C, aftertreatment: target compound is heat-treated.
2. the method preparing ceramic coating at titanium alloy surface according to claim 1, is characterized in that the graphite purity described in step A is more than 99.5%.
3. the method preparing ceramic coating at titanium alloy surface according to claim 1, is characterized in that the power parameter of the differential arc oxidation described in step B is set to: forward current 1 ~ 3A, negative current 0.5 ~ 1A, frequency 100 ~ 1200Hz, forward dutycycle 10 ~ 90%, negative sense dutycycle 10 ~ 90%, time 10 ~ 30min.
4. the method preparing ceramic coating at titanium alloy surface according to claim 1, is characterized in that the thermal treatment described in step C is that target compound is heated 0.5 ~ 4h at 100 ~ 1300 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002546A (en) * | 2015-08-08 | 2015-10-28 | 昆明冶金研究院 | Method for preparing wear-resisting biological ceramic film on surface of titanium alloy through micro-arc oxidation |
| CN111690972A (en) * | 2019-03-06 | 2020-09-22 | 苏州鱼得水电气科技有限公司 | Processing technology of high-temperature-resistant ceramic oxide film |
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| CN102021629A (en) * | 2010-12-30 | 2011-04-20 | 南昌航空大学 | Method for preparing titanium-alloy surface micro-arc oxidation antifriction compound film layer |
| CN102560599A (en) * | 2012-02-09 | 2012-07-11 | 常州大学 | Preparation method for in-situ growth of oxide film on titanium alloy surface |
| CN103266339A (en) * | 2013-05-21 | 2013-08-28 | 中国船舶重工集团公司第七二五研究所 | Low-voltage and low-current-density micro-arc oxidizing method of titanium alloy workpiece |
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| CN102021629A (en) * | 2010-12-30 | 2011-04-20 | 南昌航空大学 | Method for preparing titanium-alloy surface micro-arc oxidation antifriction compound film layer |
| CN102560599A (en) * | 2012-02-09 | 2012-07-11 | 常州大学 | Preparation method for in-situ growth of oxide film on titanium alloy surface |
| CN103266339A (en) * | 2013-05-21 | 2013-08-28 | 中国船舶重工集团公司第七二五研究所 | Low-voltage and low-current-density micro-arc oxidizing method of titanium alloy workpiece |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002546A (en) * | 2015-08-08 | 2015-10-28 | 昆明冶金研究院 | Method for preparing wear-resisting biological ceramic film on surface of titanium alloy through micro-arc oxidation |
| CN111690972A (en) * | 2019-03-06 | 2020-09-22 | 苏州鱼得水电气科技有限公司 | Processing technology of high-temperature-resistant ceramic oxide film |
| CN111705348A (en) * | 2019-03-06 | 2020-09-25 | 苏州鱼得水电气科技有限公司 | Processing technology of high-temperature-resistant ceramic oxide film |
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Address after: 650031 No. 86 Yuantong North Road, Yunnan, Kunming Patentee after: Kunming Metallurgical Research Institute Co., Ltd Address before: 650031 No. 86 Yuantong North Road, Yunnan, Kunming Patentee before: Kunming Metallurgical Research Institute |