CN101914764B - Micro-arc oxidation pretreatment method before chemical nickel-plating of titanium alloy - Google Patents
Micro-arc oxidation pretreatment method before chemical nickel-plating of titanium alloy Download PDFInfo
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Abstract
The invention discloses a micro-arc oxidation pretreatment method before chemical nickel-plating of a titanium alloy. The pretreatment method is characterized by introducing a micro-arc oxidation process before an activation process, so that the titanium alloy with a micro-arc oxidation film on the surface is subjected to post-activation chemical nickel-plating. The pretreatment method comprises the following steps of: (1) performing chemical oil removal; (2) performing micro-arc oxidation; (3) performing activation; (4) performing chemical nickel-plating; and (5) performing post-treatment. The pretreatment method has the advantage that: a high-performance chemical nickel-plating film with strong binding force, high hardness and high corrosion resistance can be obtained on the surface of the titanium alloy.
Description
Technical field
The present invention relates to a kind of titanium alloy chemical nickel plating pre-treating process, relate in particular to a kind of chemical nickel plating method that adopts differential arc oxidation as the pre-treatment of titanium alloy chemical nickel plating.
Background technology
Outside the advantages such as titanium alloy has that density is little, specific tenacity is high, solidity to corrosion and Heat stability is good; Also can be under 500～600 ℃ of high temperature long term operation and do not lose its original mechanical performance; It has not only replaced duraluminum, magnesiumalloy and steel member on aircraft engine, and on advanced aircraft, also obtains to widely apply.Titanium alloy is except widely applying on aviation field, and usage quantity in daily life also increases day by day, as at aspects such as biomedicine, auto parts, electron trades.But titanium or titanium alloy wear resistance, electrical and thermal conductivity, solderability are not very good, have limited its range of application.
For titanium alloy more is widely used in the aircraft industry, coating surface is handled the important that seems.In titanium alloy surface nickel plating, can improve wear resistance of titanium alloy and solidity to corrosion, increase the work-ing life of part, make it more can be applicable to aerospace field.The conventional surface treatment process of titanium alloy comprises chemical milling, dichromate activation, strike plating electronickelling.The marginal discharge effect of electric current during plating makes edge of work coating thicken, and be not suitable for the strict precision component of dimensional requirement, and nickeling layer is intensely dark, and tack is bad.In order to overcome the shortcoming of traditional technology; People work out chemical nickel plating on titanium alloy, in order further to improve the range of application and the work-ing life of titanium alloy, often need carry out surface treatment to titanium alloy; Like chromium plating, chemical nickel plating, function conversion film etc.; Wherein, can also give titanium-based surface special physical and chemical performance, such as improving titanium base hardness, wear resistance etc. at the titanium-based surface chemical nickel plating.Because titanium alloy surface has the fine and close sull of one deck, had a strong impact on the electroconductibility and the chemically reactive on titanium spare surface, if on its surface directly plating metal level be suitable difficulty.Even remove rete through oil removing, etch, unsalted surface is exposed in the air, the very fast new sull of oxidized again formation one deck.Because the sull of titanium alloy surface has very high chemicalstability; Had a strong impact on the electroconductibility and the chemically reactive of titanium alloy surface, brought very big difficulty, and the coating of plating and basal body binding force are poor to plating; It is serious to ooze hydrogen, so must before plating, carry out activation treatment.At present, most of titanium alloy surface electroplating technologies all only adopt suitable plating front activating to handle, and plate the back diffusion heat treatments again, make to form diffusion layer between coating and the matrix and improve its bonding force.
Differential arc oxidization technique is on the basis of anodizing technology, to grow up, but the formation mechanism of both retes has a great difference.Differential arc oxidization technique uses higher voltage in preparation, exceeded anodised scope fully, will prepare voltage regime and be incorporated into the effluve zone by the Faraday district.In the differential arc oxidation process, chemical oxidation, electrochemical oxidation and plasma oxidation effect exist simultaneously, and the forming process of ceramic coating is very complicated, and the film hardness that obtains is high, and wear resistance is good.The present invention is exactly the intermediate layer before utilizing this ceramic coating as the titanium alloy surface chemical nickel plating; Improve the coefficient of mass transfer of transition differential arc oxidation film layer; Improve the surface tissue of active ingredient differential arc oxidation film layer; Make it be cellular, thereby improve the sedimentation rate of coating, strengthen the bonding force of coating and matrix.
What differential arc oxidization technique application at present was maximum is on magnesium, aluminium, titanium alloy, to form ceramic coating formed by micro-arc oxidation, generally is that this rete is independently used, and this technology is used to strengthen titanium alloy surface chemical Ni-plating layer bonding force is not reported.
Summary of the invention
The object of the present invention is to provide a kind of chemical nickel plating method that adopts differential arc oxidation as the pre-treatment of titanium alloy chemical nickel plating, adopt this method behind titanium alloy surface chemical nickel platings such as TC4, can obtain the chemical nickel plating rete that bonding force is strong, hardness is high, corrosion resisting property is superior.
The present invention realizes like this, it is characterized in that method steps is:
(1) electrochemical deoiling: sodium hydroxide 60～80g/L, tsp 20～40g/L, yellow soda ash 20～40g/L and water glass 3～10g/L are mixed with electrochemical deoiling liquid, and temperature is removed the test piece surface and oil contaminant at 70 ℃～90 ℃ with this degreasing fluid, till eliminating.Test piece is thoroughly cleaned through water after the oil removing, carries out the continuity check of surface water film again, if the whole part surface hydrophilic, the no globule and do not soak into the place thinks that then oil removing is qualified;
(2) differential arc oxidation: adopt the titanium silk to make the anchor clamps of desired shape; Guarantee that anchor clamps contact with test piece well in the differential arc oxidation process, when differential arc oxidation, because the spark discharge solution temperature raises easily; And require tank liquor temperature to be lower than 85 ℃, and adopt recirculated cooling water that tank liquor is cooled off.The basic parameter of micro-arc oxidation process is: water glass 2～4g/L, Sodium hexametaphosphate 99 2～4g/L, sodium aluminate 0.5～1.5g/L and inferior sodium phosphate 0.5～1g/L are mixed; Adopt the dc pulse superposition step mode; Pulse-repetition 60Hz, dutycycle 30～100%, average current density 2～8A/dm
2, time 5～10min;
(3) activation: with hydrochloric acid (36%) 50ml/L and hydrofluoric acid (40%) 40ml/L mixing post-flush titanium alloy surface, room temperature, flush time 3～9s;
(4) chemical nickel plating: six hydration nickel sulfate 25～30g/L, inferior sodium phosphate 20～30g/L, lactic acid 25mL/L and boric acid 10g/L are mixed with chemical nickel-plating liquid; Regulating the pH value is 4.4～4.8; 88～92 ℃ of temperature are put into this chemical nickel-plating liquid 80min with titanium alloy then.
Advantage of the present invention is: can on titanium alloy surface, obtain the chemical nickel plating rete that bonding force is strong, hardness is high, corrosion resisting property is superior.According to GB/T5270 binding force of cladding material testing method, the experiment when doing the cross-hatching test of the chemical nickel plating rete behind the titanium alloy differential arc oxidation shows that the plated nickel film rete is complete, no any peeling off and skin effect phenomenon.
Embodiment
Embodiment one: (1) electrochemical deoiling: the electrochemical deoiling prescription of removing the test piece surface and oil contaminant:
The part oil removing is carried out the continuity check of piece surface moisture film again after water thoroughly cleans, if the whole part surface hydrophilic, the no globule and do not soak into the place thinks that then oil removing is qualified.
(2) differential arc oxidation: adopt the titanium silk to make the anchor clamps of desired shape, guarantee that anchor clamps contact well with test piece in the differential arc oxidation process.When differential arc oxidation, owing to the spark discharge tank liquor temperature raises easily, and require tank liquor temperature to be lower than 85 ℃, so adopt recirculated cooling water that tank liquor is cooled off in the experiment.The basic parameter of micro-arc oxidation process is: water glass 2g/L, and Sodium hexametaphosphate 99 2g/L, sodium aluminate 0.5g/L, inferior sodium phosphate 0.5g/L adopts the dc pulse superposition step mode, pulse-repetition 60Hz, dutycycle 30～100%, average current density 2～8A/dm
2, time 5～10min;
(3) activation; Activation makes titanium alloy material surface film oxide dissolved form one deck and the good grey rete of matrix bond simultaneously, and film surface is in active state, for chemical nickel plating provides good activating surface.The basic parameter of activating process is hydrochloric acid (36%) 50ml/L, hydrofluoric acid (40%) 40ml/L, room temperature, time 6s;
(4) chemical nickel plating; Chemical nickel plating on titanium alloy can improve wear resistance of titanium alloy and solidity to corrosion, increases the work-ing life of part, makes it more can be applicable to aerospace field.The basic parameter of nickel chemical plating technology is six hydration nickel sulfate single nickel salt 25g/L, inferior sodium phosphate 20g/L, lactic acid 25mL/L, boric acid 10g/L, pH4.4～4.8,88～92 ℃ of temperature, time 80min;
(5) aftertreatment: the nickel plating rete behind the differential arc oxidation is heat-treated, and 300 ℃ of furnace temperature are incubated 1 hour, furnace cooling.Nonheat-treated nickel plating rete and base material bonding force only lean on the identical effect of machinery to keep, and make on the titanium alloy nickeling layer bonding force very poor.Thermal treatment mainly is the porousness of utilizing micro-arc oxidation films, and Ti at high temperature can associate with any ratio with Ni mutually during thermal treatment, and can at high temperature generate metallic compound such as Ti
3Ni, TiNi, TiNia etc.The purpose of heat diffusion treatment is to make the Ti-Ni interface generate metallic compound, and the differential arc oxidation film layer of micropore is as transition layer simultaneously, is combined together to form diffusion layer interacting between with nickeling layer and differential arc oxidation microporous film layers and base material under the thermodiffusion effect.Because the metal compound layer that generates between coating and matrix makes original mechanical anastomosis agency part change the chemically bonded effect into, the bonding force of coating and matrix is significantly improved.Between coating and matrix under the effect of middle micro-arc oxidation films transition layer, further reinforcing membrane interlayer bonding force.According to GB/T5270 binding force of cladding material testing method, the experiment when doing the cross-hatching test of the nickel plating rete behind the titanium alloy differential arc oxidation shows that the plated nickel film rete is complete, no any peeling off and skin effect phenomenon.
Embodiment two: (1) electrochemical deoiling: the electrochemical deoiling prescription of removing the test piece surface and oil contaminant:
The part oil removing is carried out the continuity check of piece surface moisture film again after water thoroughly cleans, if the whole part surface hydrophilic, the no globule and do not soak into the place thinks that then oil removing is qualified;
(2) differential arc oxidation: adopt the titanium silk to make the anchor clamps of desired shape, guarantee that anchor clamps contact well with test piece in the differential arc oxidation process.When differential arc oxidation, owing to the spark discharge solution temperature raises easily, and require tank liquor temperature to be lower than 85 ℃, so adopt recirculated cooling water that tank liquor is cooled off in the experiment.The basic parameter of micro-arc oxidation process is: water glass 4g/L, and Sodium hexametaphosphate 99 4g/L, sodium aluminate 1.5g/L, inferior sodium phosphate 0.1g/L adopts the dc pulse superposition step mode, pulse-repetition 60Hz, dutycycle 30～100%, average current density 2～8A/dm
2, time 5～10min;
(3) activation: activation makes titanium alloy material surface film oxide dissolved form one deck and the good grey rete of matrix bond simultaneously, and film surface is in active state, for chemical nickel plating provides good activating surface.The basic parameter of activating process is hydrochloric acid (36%) 50ml/L, hydrofluoric acid (40%) 40ml/L, room temperature, time 6s;
(4) chemical nickel plating: chemical nickel plating on titanium alloy, can improve wear resistance of titanium alloy and solidity to corrosion, increase the work-ing life of part, make it more can be applicable to aerospace field.The basic parameter of nickel chemical plating technology is six hydration nickel sulfate single nickel salt 25g/L, inferior sodium phosphate 20g/L, lactic acid 25mL/L, boric acid 10g/L, pH4.4～4.8,88～92 ℃ of temperature, time 80min;
(5) aftertreatment: the nickel plating rete behind the differential arc oxidation is heat-treated, and 300 ℃ of furnace temperature are incubated 1 hour, furnace cooling.Thermal treatment mainly is the porousness of utilizing micro-arc oxidation films, is combined together to form diffusion layer interacting between with nickeling layer and differential arc oxidation microporous film layers and base material under the thermodiffusion effect.Because the metal compound layer that generates between coating and matrix makes original mechanical anastomosis agency part change the chemically bonded effect into, the bonding force of coating and matrix is significantly improved.Between coating and matrix under the effect of middle micro-arc oxidation films transition layer, further reinforcing membrane interlayer bonding force.According to GB/T5270 binding force of cladding material testing method, the experiment when doing the cross-hatching test of the chemical nickel plating rete behind the titanium alloy differential arc oxidation shows that the plated nickel film rete is complete, no any peeling off and skin effect phenomenon.
Embodiment three: (1) electrochemical deoiling: the electrochemical deoiling prescription of removing the test piece surface and oil contaminant:
The part oil removing is carried out the continuity check of piece surface moisture film again after water thoroughly cleans, if the whole part surface hydrophilic, the no globule and do not soak into the place thinks that then oil removing is qualified;
(2) differential arc oxidation: adopt the titanium silk to make the anchor clamps of desired shape, guarantee that anchor clamps contact well with test piece in the differential arc oxidation process.When differential arc oxidation, owing to the spark discharge tank liquor temperature raises easily, and require tank liquor temperature to be lower than 85 ℃, so adopt recirculated cooling water that tank liquor is cooled off in the experiment.The basic parameter of micro-arc oxidation process is: water glass 3g/L, and Sodium hexametaphosphate 99 3g/L, sodium aluminate 1.0g/L, inferior sodium phosphate 0.8g/L adopts the dc pulse superposition step mode, pulse-repetition 60Hz, dutycycle 30～100%, average current density 2～8A/dm
2, time 5～10min;
(3) activation: activation makes titanium alloy material surface film oxide dissolved form one deck and the good grey rete of matrix bond simultaneously, and film surface is in active state, for chemical nickel plating provides good activating surface.The basic parameter of activating process is hydrochloric acid (36%) 50ml/L, hydrofluoric acid (40%) 40ml/L, room temperature, 6s;
(4) chemical nickel plating: chemical nickel plating on titanium alloy, can improve wear resistance of titanium alloy and solidity to corrosion, increase the work-ing life of part, make it more can be applicable to aerospace field.The basic parameter of nickel chemical plating technology is: six hydration nickel sulfate single nickel salt 25g/L, and inferior sodium phosphate 20g/L, lactic acid 25mL/L, boric acid 10g/L, pH 4.4～4.8,88～92 ℃ of temperature, time 80min;
(5) aftertreatment: the nickel plating rete behind the differential arc oxidation is heat-treated, and 300 ℃ of furnace temperature are incubated 1 hour, furnace cooling.Thermal treatment mainly is the porousness of utilizing micro-arc oxidation films, is combined together to form diffusion layer interacting between with nickeling layer and differential arc oxidation microporous film layers and base material under the thermodiffusion effect.Because the metal compound layer that generates between coating and matrix makes original mechanical anastomosis agency part change the chemically bonded effect into, the bonding force of coating and matrix is significantly improved.Between coating and matrix under the effect of middle micro-arc oxidation films transition layer, further reinforcing membrane interlayer bonding force.According to GB/T5270 binding force of cladding material testing method, the experiment when doing the cross-hatching test of the chemical nickel plating rete behind the titanium alloy differential arc oxidation shows that the plated nickel film rete is complete, no any peeling off and skin effect phenomenon.
Embodiment four: (1) electrochemical deoiling: the electrochemical deoiling prescription of removing the test piece surface and oil contaminant:
The part oil removing is carried out the continuity check of piece surface moisture film again after water thoroughly cleans, if the whole part surface hydrophilic, the no globule and do not soak into the place thinks that then oil removing is qualified;
(2) differential arc oxidation: adopt the titanium silk to make the anchor clamps of desired shape, guarantee that anchor clamps contact well with test piece in the differential arc oxidation process.When differential arc oxidation, owing to the spark discharge tank liquor temperature raises easily, and require tank liquor temperature to be lower than 85 ℃, so adopt recirculated cooling water that tank liquor is cooled off in the experiment.The basic parameter of micro-arc oxidation process is: water glass 3.0g/L, Sodium hexametaphosphate 99 3.0g/L, sodium aluminate 1.0g/L; Inferior sodium phosphate 0.8g/L adopts the dc pulse superposition step mode, pulse-repetition 60Hz; Dutycycle 30～100%, average current density 2～8A/dm
2, time 5～10min;
(3) activation: activation makes titanium alloy material surface film oxide dissolved form one deck and the good grey rete of matrix bond simultaneously, and film surface is in active state, for chemical nickel plating provides good activating surface.The basic parameter of activating process is hydrochloric acid (36%) 50ml/L, hydrofluoric acid (40%) 40ml/L, room temperature, time 3s;
(4) chemical nickel plating: chemical nickel plating on titanium alloy, can improve wear resistance of titanium alloy and solidity to corrosion, increase the work-ing life of part, make it more can be applicable to aerospace field.The basic parameter of nickel chemical plating technology is six hydration nickel sulfate single nickel salt 30g/L, inferior sodium phosphate 35g/L, lactic acid 25mL/L, boric acid 10g/L, pH4.4～4.8,88～92 ℃ of temperature, time 80min;
(5) aftertreatment: the nickel plating rete behind the differential arc oxidation is heat-treated, and 300 ℃ of furnace temperature are incubated 1 hour, furnace cooling.Thermal treatment mainly is the porousness of utilizing micro-arc oxidation films, is combined together to form diffusion layer interacting between with nickeling layer and differential arc oxidation microporous film layers and base material under the thermodiffusion effect.Because the metal compound layer that generates between coating and matrix makes original mechanical anastomosis agency part change the chemically bonded effect into, the bonding force of coating and matrix is significantly improved.Between coating and matrix under the effect of middle micro-arc oxidation films transition layer, further reinforcing membrane interlayer bonding force.According to GB/T5270 binding force of cladding material testing method, the experiment when doing the cross-hatching test of the chemical nickel plating rete behind the titanium alloy differential arc oxidation shows that the plated nickel film rete is complete, no any peeling off and skin effect phenomenon.
Embodiment five: (1) electrochemical deoiling: the electrochemical deoiling prescription of removing the test piece surface and oil contaminant:
The part oil removing is carried out the continuity check of piece surface moisture film again after water thoroughly cleans, if the whole part surface hydrophilic, the no globule and do not soak into the place thinks that then oil removing is qualified;
(2) differential arc oxidation: adopt the titanium silk to make the anchor clamps of desired shape, guarantee that anchor clamps contact well with test piece in the differential arc oxidation process.When differential arc oxidation, owing to the spark discharge tank liquor temperature raises easily, and require tank liquor temperature to be lower than 85 ℃, so adopt recirculated cooling water that tank liquor is cooled off in the experiment.The basic parameter of micro-arc oxidation process is: water glass 3.0g/L, Sodium hexametaphosphate 99 3.0g/L, sodium aluminate 1.0g/L; Inferior sodium phosphate 0.8g/L adopts the dc pulse superposition step mode, pulse-repetition 60Hz; Dutycycle 30～100%, average current density 2～8A/dm
2, time 5～10min;
(3) activation: activation makes titanium alloy material surface film oxide dissolved form one deck and the good grey rete of matrix bond simultaneously, and film surface is in active state, for chemical nickel plating provides good activating surface.The basic parameter of activating process is hydrochloric acid (36%) 50ml/L, hydrofluoric acid (40%) 40ml/L, room temperature, time 9s;
(4) chemical nickel plating; Chemical nickel plating on titanium alloy can improve wear resistance of titanium alloy and solidity to corrosion, increases the work-ing life of part, makes it more can be applicable to aerospace field.The basic parameter of nickel chemical plating technology is six hydration nickel sulfate single nickel salt 30g/L, inferior sodium phosphate 30g/L, lactic acid 25mL/L, boric acid 10g/L, pH4.4～4.8,88～92 ℃ of temperature, time 80min;
(5) aftertreatment: the nickel plating rete behind the differential arc oxidation is heat-treated, and 300 ℃ of furnace temperature are incubated 1 hour, furnace cooling.Thermal treatment mainly is the porousness of utilizing micro-arc oxidation films, is combined together to form diffusion layer interacting between with nickeling layer and differential arc oxidation microporous film layers and base material under the thermodiffusion effect.Because the metal compound layer that generates between coating and matrix makes original mechanical anastomosis agency part change the chemically bonded effect into, the bonding force of coating and matrix is significantly improved.Between coating and matrix under the effect of middle micro-arc oxidation films transition layer, further reinforcing membrane interlayer bonding force.According to GB/T5270 binding force of cladding material testing method, the experiment when doing the cross-hatching test of the chemical nickel plating rete behind the titanium alloy differential arc oxidation shows that the plated nickel film rete is complete, no any peeling off and skin effect phenomenon.
Claims (1)
1. chemical nickel plating method that adopts differential arc oxidation as the pre-treatment of titanium alloy chemical nickel plating is characterized in that method steps is:
(1) electrochemical deoiling: sodium hydroxide 60～80g/L, tsp 20～40g/L, yellow soda ash 20～40g/L and water glass 3～10g/L are mixed with electrochemical deoiling liquid, and temperature is removed the test piece surface and oil contaminant at 70 ℃～90 ℃ with this degreasing fluid; Till eliminating; Test piece is thoroughly cleaned through water after the oil removing, carries out the continuity check of surface water film again, if the whole part surface hydrophilic; The no globule and do not soak into the place thinks that then oil removing is qualified;
(2) differential arc oxidation: adopt the titanium silk to make the anchor clamps of desired shape; Guarantee that anchor clamps contact with test piece well in the differential arc oxidation process, when differential arc oxidation, because the spark discharge solution temperature raises easily; And require tank liquor temperature to be lower than 85 ℃, and adopt recirculated cooling water that tank liquor is cooled off.The basic parameter of micro-arc oxidation process is: water glass 2～4g/L, Sodium hexametaphosphate 99 2～4g/L, sodium aluminate 0.5～1.5g/L and inferior sodium phosphate 0.5～1g/L are mixed; Adopt the dc pulse superposition step mode; Pulse-repetition 60Hz, dutycycle 30～100%, average current density 2～8A/dm
2, time 5～10min;
(3) activation: with concentration is that 36% hydrochloric acid 50ml/L and concentration are 40% hydrofluoric acid 40ml/L mixing post-flush titanium alloy surface, room temperature, flush time 3～9s;
(4) chemical nickel plating: six hydration nickel sulfate 25～30g/L, inferior sodium phosphate 20～30g/L, lactic acid 25mL/L and boric acid 10g/L are mixed with chemical nickel-plating liquid; Regulating the pH value is 4.4～4.8; 88～92 ℃ of temperature are put into this chemical nickel-plating liquid 80min with titanium alloy then.
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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 |
| CN102179521B (en) * | 2011-04-20 | 2013-01-02 | 北京科技大学 | Preparation method of ultra-fine spherical nickel coated titanium composite powder |
| CN102392233A (en) * | 2011-11-02 | 2012-03-28 | 沈阳飞机工业（集团）有限公司 | Method for adopting hydrogenating treatment as pretreatment of chemical nickel plating of titanium alloy |
| CN103160892A (en) * | 2011-12-13 | 2013-06-19 | 贵州黎阳航空动力有限公司 | Preparation method of titanium alloy silver coating |
| CN103103597B (en) * | 2013-01-23 | 2015-11-18 | 西北工业大学 | A kind of titanium alloy self-lubricating composite membrane and preparation method thereof |
| CN103320838B (en) * | 2013-06-03 | 2016-03-02 | 哈尔滨工业大学 | The method of the yellow ceramic film of a kind of TC4 titanium alloy surface growth in situ |
| CN104005068B (en) * | 2014-02-26 | 2016-06-29 | 宁波丰沃涡轮增压系统有限公司 | A kind of anti-corrosion method of the aluminium base impeller of turbocharger pressure side |
| CN104846383B (en) * | 2015-05-11 | 2017-09-26 | 山东汇川汽车部件有限公司 | A kind of production method of automobile power-assisted steering pump valve element |
| CN106567057B (en) * | 2016-11-14 | 2019-01-22 | 南昌航空大学 | A method of Ti Alloying nickel plating pre-treatment is turned to using fluoride-phosphate transfection |
| CN106435540B (en) * | 2016-11-15 | 2018-09-04 | 中国科学院上海高等研究院 | A kind of pre-treating method carrying out chemical nickel plating on alumina-base material surface |
| CN108004576A (en) * | 2017-11-03 | 2018-05-08 | 南京工业大学 | Micro-arc oxidation process |
| CN109267136B (en) * | 2018-09-26 | 2020-09-25 | 西安理工大学 | Titanium bolt surface ceramic method based on in-situ growth |
| CN109183099A (en) * | 2018-10-30 | 2019-01-11 | 无锡鼎亚电子材料有限公司 | It is a kind of for the weak caustic solution of oil removing to be electroplated |
| CN110819972A (en) * | 2019-08-28 | 2020-02-21 | 江苏科技大学 | Chemical nickel plating method for titanium-based composite material |
| CN113463160A (en) * | 2021-07-02 | 2021-10-01 | 索罗曼(常州)合金新材料有限公司 | Method for realizing titanium alloy wear-resistant coating |
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