CN104790016B - A method of preparing ceramic coating in titanium alloy surface - Google Patents
A method of preparing ceramic coating in titanium alloy surface Download PDFInfo
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- CN104790016B CN104790016B CN201510156551.1A CN201510156551A CN104790016B CN 104790016 B CN104790016 B CN 104790016B CN 201510156551 A CN201510156551 A CN 201510156551A CN 104790016 B CN104790016 B CN 104790016B
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- titanium alloy
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Abstract
The invention discloses a kind of methods preparing ceramic coating in titanium alloy surface, including prepared by electrolyte quota, coating, coating post-processing step, specifically includes：Sodium metasilicate is taken, the distilled water of 50 ~ 100 times of solid-liquid volume ratio is added, stirring and dissolving is complete, adds the sodium dihydrogen phosphate of 0.3 ~ 0.8 times of sodium metasilicate weight ratio, and stirring and dissolving is complete, adds the graphite of 0.1 ~ 0.8 times of sodium metasilicate weight ratio, is uniformly mixing to obtain electrolyte；Electrolyte is poured into electrolytic cell, titanium alloy material to be coated is placed in differential arc oxidation in electrolyte and obtains object；Object is heat-treated.The present invention is directed to the deficiency of titanium alloy corrosion resistance, one layer of ceramic coating is prepared on its surface, substantially increase corrosion resistance of the titanium alloy component under acid solution environment, compensate for the deficiency of titanium alloy performance under acidic environment, improve usage time of the titanium alloy material under acidic environment, the service life for extending part, reduces production cost.
Description
Technical field
The invention belongs to chemical technology fields, and in particular to a method of in the other ceramic coating of titanium alloy surface.
Background technology
Titanium alloy is because having the characteristics that intensity is high, density is small, elasticity modulus is low, good biocompatibility is widely used in aviation
The fields such as space flight, ship, petrochemical industry, biomedicine.Although titanium alloy material is used well in above-mentioned each field,
Under some particular job environment, titanium alloy material shows the deficiency of performance so that its use space is also by certain office
It is sex-limited.Ball valve, pipeline, tube wall, the container such as prepared by titanium alloy material, even if titanium alloy material has preferably acid solution
Resistance effect, but for a long time under the acid solution environment, titanium alloy material also can slowly be corroded by solution, so, for
The titanium alloy material of some privileged sites should have stronger corrosion resistance, therefore improve the corrosion-resistant particularly heavy of titanium alloy material
It wants, not only increases working efficiency, extend usage time, while largely reducing cost.So being directed to titanium alloy material
Material prepares a kind of film layer that corrosion resistance is strong under acid solution environment, in material surface by modification technology means, enhances titanium
The corrosion resistance of alloy material extends the service life of material.
Invention content
The purpose of the present invention is to provide a kind of methods preparing ceramic coating in titanium alloy surface.
The object of the present invention is achieved like this, including electrolyte quota, preparation, post-processing step, specifically includes：
A, electrolyte quota：Sodium metasilicate is taken, the distilled water of 50 ~ 100 times of solid-liquid volume ratio is added, stirring and dissolving is complete,
The sodium dihydrogen phosphate of 0.3 ~ 0.8 times of sodium metasilicate weight ratio is added, stirring and dissolving is complete, adds sodium metasilicate weight ratio 0.1
~ 0.8 times of graphite, is uniformly mixing to obtain electrolyte；
B, it prepares：Electrolyte is poured into electrolytic cell, titanium alloy material to be coated is placed in differential arc oxidation in electrolyte and obtains
Object；
C, it post-processes：Object is heat-treated.
The present invention is directed to the deficiency of titanium alloy corrosion resistance, and one layer of ceramic coating is prepared on its surface, substantially increases
Corrosion resistance of the titanium alloy component under acid solution environment, compensates for the deficiency of titanium alloy performance under acidic environment, carries
High usage time of the titanium alloy material under acidic environment, extends the service life of part, reduces production cost.
Specific implementation mode
With reference to embodiment, the present invention is further illustrated, but is not limited in any way to the present invention,
Based on present invention teach that made by it is any transform or replace, all belong to the scope of protection of the present invention.
The method of the present invention for preparing ceramic coating in titanium alloy surface, including electrolyte quota, preparation, post-processing
Step specifically includes：
A, electrolyte quota：Sodium metasilicate is taken, the distilled water of 50 ~ 100 times of solid-liquid volume ratio is added, stirring and dissolving is complete,
The sodium dihydrogen phosphate of 0.3 ~ 0.8 times of sodium metasilicate weight ratio is added, stirring and dissolving is complete, adds sodium metasilicate weight ratio 0.1
~ 0.8 times of graphite, is uniformly mixing to obtain electrolyte；
B, it prepares：Electrolyte is poured into electrolytic cell, titanium alloy material to be coated is placed in differential arc oxidation in electrolyte and obtains
Object；
C, it post-processes：Object is heat-treated.
Graphite purity described in step A is 99.5% or more.
The power parameter of differential arc oxidation described in step B is set as：1 ~ 3A of forward current, 0.5 ~ 1A of negative current, frequency
100 ~ 1200Hz of rate, positive duty ratio 10 ~ 90%, negative sense duty ratio 10 ~ 90%, 10 ~ 30min of time.
Heat treatment described in step C is that object is heated to 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, adds 75g sodium metasilicate, after being completely dissolved, adds 50g phosphorus
Acid dihydride sodium, addition 32g high purity graphites stir evenly after sodium dihydrogen phosphate is completely dissolved, and pour into electrolytic cell, titanium is closed
The suspension of golden sample in the electrolytic solution, mao power source parameter be set as forward current 3A, negative current 1A, frequency 1200Hz,
Positive duty ratio 90%, negative sense duty ratio 10%, oxidization time 20min, after the ceramic layer on surface of acquisition is cleaned, without heating
Processing, part has been put into diluted hydrofluoric acid solution, and after impregnating 1.5min, the ceramic layer of piece surface falls off, and starts
Existing bubble.
Embodiment 2
5000ml distilled water is added in 5000ml beakers, adds 100g sodium metasilicate, after being completely dissolved, adds di(2-ethylhexyl)phosphate
Hydrogen sodium 30g, addition high purity graphite 10g is stirred evenly after sodium dihydrogen phosphate is completely dissolved, and is poured into electrolytic cell, titanium alloy
Sample is hung in the electrolytic solution, and mao power source parameter is set as forward current 1A, negative current 0.5A, frequency 300Hz, just
To duty ratio 10%, negative sense duty ratio 90%, oxidization time 10min, after the ceramic layer on surface of acquisition is cleaned, using resistance box into
Row heating, temperature control is at 100 DEG C, time control 2h.After above-mentioned processing, it is molten that part diluted hydrofluoric acid has been put into
In liquid, after impregnating 10min, the ceramic layer of piece surface falls off, and starts bubble occur.
Embodiment 3
The distilled water of 5000ml is added in 5000ml beakers, adds 75g sodium metasilicate, after being completely dissolved, adds phosphoric acid
High purity graphite 30g is added after sodium dihydrogen phosphate is completely dissolved, stirs evenly, pours into electrolytic cell, titanium by sodium dihydrogen 50g
Alloy part is hung in the electrolytic solution, and mao power source parameter is set as forward current 1.5A, negative current 0.75A, frequency
600Hz, positive duty ratio 50%, negative sense duty ratio 50%, oxidization time 15min, after the ceramic layer on surface of acquisition is cleaned, use
Resistance box is heated, and temperature control is at 500 DEG C, time control 2h.After above-mentioned processing, part is put into diluted
In hydrofluoric acid solution, after impregnating 20min, the ceramic layer of piece surface falls off, and starts bubble occur.
Embodiment 4
Distilled water is added in 5000ml beakers, adds 50g sodium metasilicate, after being completely dissolved, adds sodium dihydrogen phosphate
40g, addition high purity graphite 40g is stirred evenly after sodium dihydrogen phosphate is completely dissolved, and is poured into electrolytic cell, titanium alloy component
In the electrolytic solution, mao power source parameter is set as forward current 2.0A, negative current 1A, frequency 900Hz, forward direction and accounts for for suspension
Sky is added after cleaning the ceramic layer on surface of acquisition using resistance box than 30%, negative sense duty ratio 70%, oxidization time 10min
Heat, temperature control is at 1300 DEG C, time control 0.5h.After above-mentioned processing, it is molten that part diluted hydrofluoric acid has been put into
In liquid, after impregnating 16min, the ceramic layer of piece surface falls off, and starts bubble occur.
Claims (2)
1. a kind of method preparing ceramic coating in titanium alloy surface, it is characterised in that including electrolyte quota, preparation, post-processing
Step specifically includes：
A, electrolyte quota：It takes sodium metasilicate, is added distilled water, the solid-liquid mass volume ratio g/ml of sodium metasilicate and distilled water is 1:50
~ 100, stirring and dissolving is complete, adds the sodium dihydrogen phosphate of 0.3 ~ 0.8 times of sodium metasilicate weight ratio, stirring and dissolving is complete, adds
The graphite that 0.1 ~ 0.8 times of sodium metasilicate weight ratio, is uniformly mixing to obtain electrolyte；
B, it prepares：Electrolyte is poured into electrolytic cell, titanium alloy material to be coated is placed in differential arc oxidation in electrolyte, differential arc oxidation
Power parameter be set as：1 ~ 3A of forward current, 0.5 ~ 1A of negative current, 300 ~ 900Hz of frequency, positive duty ratio 10 ~ 90%,
Negative sense duty ratio 10 ~ 90% is electrolysed to obtain object through 10 ~ 30min；
C, it post-processes：Object is heated 0.5 ~ 4h at 100 ~ 1300 DEG C to be heat-treated.
2. the method according to claim 1 for preparing ceramic coating in titanium alloy surface, it is characterised in that described in step A
Graphite purity be 99.5% or more.
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| CN104790016B true CN104790016B (en) | 2018-07-27 |
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| 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 |
| 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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| 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 |
| CN103266339B (en) * | 2013-05-21 | 2016-01-27 | 中国船舶重工集团公司第七二五研究所 | The differential arc oxidation method of a kind of titanium alloy workpiece low voltage, low current density |
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| 脉冲占空比对钛合金微弧氧化膜及电流密度的影响;赵晖;《电镀与精饰》;20110228;第33卷(第2期);第35页 * |
| 钛合金微弧氧化一步制备含石墨的减摩涂层;穆明等;《材料科学与工艺》;20130228;第21卷(第3期);第18-23页 * |
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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 |
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