CN104005059A - Method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy - Google Patents
Method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy Download PDFInfo
- Publication number
- CN104005059A CN104005059A CN201410257959.3A CN201410257959A CN104005059A CN 104005059 A CN104005059 A CN 104005059A CN 201410257959 A CN201410257959 A CN 201410257959A CN 104005059 A CN104005059 A CN 104005059A
- Authority
- CN
- China
- Prior art keywords
- titanium alloy
- chromium
- temperature
- solution
- described step
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Electroplating Methods And Accessories (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The invention discloses a method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy. The method includes the first step of removing oil on the TC1 titanium alloy and the TC2 titanium alloy, the second step of conducting sand blasting on the TC1 titanium alloy and the TC2 titanium alloy after oil removal, the third step of activating the TC1 titanium alloy and the TC2 titanium alloy after sand blasting, the fourth step of hydrogenating the TC1 titanium alloy and the TC2 titanium alloy after activation, the fifth step of plating milky-white chromium on the TC1 titanium alloy and the TC2 titanium alloy after hydrogenation, and the sixth step of plating hard chromium on the TC1 titanium alloy and the TC2 titanium alloy. Through the method, the influences of oxidation films on the chromium electroplating of the TC1 titanium alloy and the TC2 titanium alloy are eliminated, the performance of base materials of the TC1 titanium alloy and the TC2 titanium alloy is guaranteed, and the excellent performance of the TC1 titanium alloy and the TC2 titanium alloy is effectively developed.
Description
Technical field
The present invention relates to a kind of method at titanium alloy surface electrodeposited chromium, be specifically related to a kind of method at TC1, TC2 titanium alloy surface electrodeposited chromium.
Background technology
TC1, TC2 titanium alloy have many good performances, and often so that light specific gravity, erosion resistance be good etc., advantage is widely used in Aeronautics and Astronautics, navigation and Chemicals.Yet its wear resistance is poor, the heat conduction of, surface film responsive to hot salt corrosion and electroconductibility is low, welding difficulty etc., also makes it in application, be restricted.The advantages such as chromium coating has microhardness high (HV > 700), wear resistance is good, coating is stable, have been widely used in the protection of aircraft high-duty steel part.Yet TC1, TC2 titanium alloy substrate be very easily rapid natural oxidation in air, the oxide film that surface produces has seriously hindered normally carrying out of electroplating, therefore, how to eliminate the impact of TC1, TC2 oxidation film on titanium alloy surface, at TC1, TC2 titanium alloy surface, carry out electrodeposited chromium, to guarantee the premium properties of titanium alloy self, solve again the poor shortcoming of its surface abrasion resistance, and then to improve its over-all properties be the problem that those skilled in the art need solution badly.
Summary of the invention
The problem and shortage existing for solving prior art, the invention provides a kind of on TC1, TC2 titanium alloy the method for electrodeposited chromium, the method has not only been eliminated the impact of oxide film on TC1, TC2 titanium alloy electrodeposited chromium, also guaranteed the performance of TC1, TC2 titanium alloy base material, make TC1, TC2 titanium alloy premium properties be effectively played.
For the technical solution adopted in the present invention that achieves the above object is,
On TC1, TC2 titanium alloy, a method for electrodeposited chromium, comprises the steps:
1) by TC1, the oil removing in removing oil solution of TC2 titanium alloy, till Ex-all;
Preferably, oil removing solution composition is: sodium hydroxide 60g/L-80g/L, and sodium carbonate 30g/L-50g/L, tertiary sodium phosphate 30g/L-50g/L, water glass 10g/L-30g/L, surplus is water, temperature is 75 ℃-95 ℃.
2) TC1 after oil removing, TC2 titanium alloy are adopted to quartz sand or emergy sandblast, blasting pressure is 0.3MPa-0.5MPa;
3) TC1 after sandblast, TC2 titanium alloy being put into temperature is the standing 30s-45s of acidic solution of 18 ℃-25 ℃, activates and makes TC1, TC2 titanium alloy remove thickness 2 μ m-3 μ m;
Preferably, acidic solution consists of: hydrochloric acid (ρ=1.19g/ml) 40ml/L-50ml/L, and 40% (v/v) hydrofluoric acid 25ml/L-30ml/L, surplus is water.
4) by TC1, TC2 titanium alloy after activation, in temperature, be standing 60min-90min in the sulfuric acid of 18 ℃-25 ℃ and hydrochloric acid, carry out hydrogenation;
Preferably, by volume, sulfuric acid (ρ=1.84g/ml): hydrochloric acid (ρ=1.19g/ml)=65:35.
5) TC1 after hydrogenation, TC2 titanium alloy are plated to milky white chromium;
Solution composition is as follows:
Condition:
Temperature 70 degree-80 degree
Current density 30A/dm
2-40A/dm
2
Time 1h.
6) again to TC1 or TC2 titanium alloy hard chrome plating
Solution composition is as follows:
Condition:
Temperature 50 degree-60 degree
Current density 45A/dm
2-55A/dm
2
Time sedimentation rate: 20 μ m/h-30 μ m/h.
Adopt the present invention a kind of on TC1, TC2 titanium alloy the method for electrodeposited chromium, not only effectively eliminated the impact of oxide film on TC1, TC2 titanium alloy electrodeposited chromium, the performance that has guaranteed TC1, TC2 titanium alloy base material, is not fully exerted the over-all properties of TC1, TC2 titanium alloy.
Embodiment
The method of 1 one kinds of electrodeposited chromiums on TC1, TC2 titanium alloy of embodiment
(1) step is as follows:
1) by TC1, TC2 titanium alloy following except oil removing in oil solution, till Ex-all;
Remove oil solution: sodium hydroxide 70g/L, sodium carbonate 40g/L, tertiary sodium phosphate 40g/L, water glass 20g/L, surplus is water, temperature is 75 degree-95 degree.
2) TC1 after oil removing, TC2 titanium alloy are adopted to quartz sand or emergy sandblast, blasting pressure is 0.4MPa;
3) TC1 after sandblast, TC2 titanium alloy being put into temperature is 18 ℃-25 ℃, by hydrochloric acid (ρ=1.19g/ml) 45ml/L, hydrofluoric acid 40% (v/v) 25ml/L, surplus is water, standing 30s-45s in the acidic solution forming, activates and makes TC1, TC2 titanium alloy remove thickness 2 μ m-3 μ m;
4) by TC1, TC2 titanium alloy after activation, in temperature, be 18 ℃-25 ℃, standing 60min-90min in sulfuric acid (ρ=1.84g/ml) and hydrochloric acid (ρ=1.19g/ml) mixing solutions that 65:35 forms by volume, carries out hydrogenation;
5) TC1 after hydrogenation, TC2 titanium alloy are plated to milky white chromium under following component solution and condition,
Solution composition:
Condition: temperature 70 degree-80 degree; Current density 30A/dm
2-40A/dm
2; Time 1h.
6) again to TC1, TC2 titanium alloy hard chrome plating hard chrome plating under following component solution and condition,
Solution composition:
Condition: temperature 50 degree-60 degree; Current density 45A/dm
2-55A/dm
2; Sedimentation rate: 20 μ m/h-30 μ m/h.That is: electroplate 30min-45min during thickness 10 μ m-20 μ m; During thickness 20 μ m-40 μ m, electroplate 60min-90min; During thickness 40 μ m-80 μ m, electroplate 120min-180min.
(2) result
According to this method, electroplate, solved in titanium alloy air after spontaneous oxide film cannot plating a difficult problem, increase substantially the bonding force of titanium alloy substrate and chromium coating, make chromium coating can effectively exercise its function.Coating surface is for being slightly with bright grey azury, and coating is fine and close, evenly, and smooth surface, smooth, has metalluster, without coarse, bubble, come off, the defect such as ingotism, surperficial after grinding (grind, bore and grind), coating is without peeling or come off.
According to said method after electrodeposited chromium.TC1, two kinds of titanium alloy material self performance impacts of TC2 are all met the requirements, and hydrogen embrittlement test is pressed ASTM F519 method, and the hydrogen content after plating is about 0.0120%, meets material requirements; Tensile strength properties is pressed HB5214 test, and elongation reduces by 15.7%, and relative reduction in area reduces by 21.3%, but tensile strength is substantially constant; Fatigue property is pressed HB5152 test and is reduced about 379MPa.
Claims (6)
1. a method for electrodeposited chromium on TC1, TC2 titanium alloy, is characterized in that, comprises the steps:
1) oil removing in removing oil solution by TC1 or TC2 titanium alloy;
2) TC1 after oil removing, TC2 titanium alloy are adopted to quartz sand or emergy sandblast, blasting pressure is 0.3MPa-0.5MPa;
3) TC1 after sandblast or TC2 titanium alloy being put into temperature is the standing 30s-45s of acidic solution of 18 ℃-25 ℃, activates and makes TC1 or TC2 titanium alloy remove thickness 2 μ m-3 μ m;
4) by the TC1 after activation or TC2 titanium alloy, in temperature, be standing 60min-90min in the mixed solution of the sulfuric acid of 18 ℃-25 ℃ and hydrochloric acid, carry out hydrogenation;
5) TC1 after hydrogenation or TC2 titanium alloy are plated to milky white chromium;
6) again to TC1 or TC2 titanium alloy hard chrome plating.
2. method according to claim 1, is characterized in that, described step 1) in oil removing solution composition be: sodium hydroxide 60g/L-80g/L, sodium carbonate 30g/L-50g/L, tertiary sodium phosphate 30g/L-50g/L, water glass 10g/L-30g/L, surplus is water, and temperature is 75 ℃-95 ℃.
3. method according to claim 1, is characterized in that, described step 3) in acidic solution consist of: hydrochloric acid 40ml/L-50ml/L, the hydrofluoric acid 25ml/L-30ml/L that volumetric concentration is 40%, surplus is water.
4. method according to claim 1, is characterized in that, described step 4) in by volume, sulfuric acid: hydrochloric acid=65:35.
5. method according to claim 1, is characterized in that, described step 5) be specially and under following component solution and condition, plate milky white chromium,
Condition: temperature: 70 ℃-80 ℃; Current density 30A/dm
2-40A/dm
2; Time 1h.
6. method according to claim 1, is characterized in that, described step 6) be specially hard chrome plating under following component solution and condition,
Chromic trioxide 200g/L-250g/L
Sulfuric acid ρ=1.84g/ml 2.0g/L-2.5g/L
Chromium sesquioxide 3g/L-8g/L
Condition: temperature: 50 ℃-60 ℃; Current density 45A/dm
2-55A/dm
2; Sedimentation rate: 20 μ m/h-30 μ m/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410257959.3A CN104005059A (en) | 2014-06-11 | 2014-06-11 | Method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410257959.3A CN104005059A (en) | 2014-06-11 | 2014-06-11 | Method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104005059A true CN104005059A (en) | 2014-08-27 |
Family
ID=51365961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410257959.3A Pending CN104005059A (en) | 2014-06-11 | 2014-06-11 | Method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104005059A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372392A (en) * | 2014-11-28 | 2015-02-25 | 沈阳飞机工业（集团）有限公司 | Method for improving uniformity of small-curvature semiarc-surface chromium coating |
| CN104404578A (en) * | 2014-11-28 | 2015-03-11 | 沈阳飞机工业（集团）有限公司 | Method for electrochromism processing of workpiece |
| CN107313079A (en) * | 2017-07-31 | 2017-11-03 | 安徽沃德气门制造有限公司 | A kind of automobile air valve rapid chrome plating technique |
| CN111005045A (en) * | 2019-12-31 | 2020-04-14 | 西安西工大超晶科技发展有限责任公司 | Preparation method of titanium and titanium alloy surface coating |
Citations (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2829091A (en) * | 1956-06-04 | 1958-04-01 | Menasco Mfg Company | Method for electroplating titanium |
| US3065154A (en) * | 1959-06-29 | 1962-11-20 | Bendix Corp | Method of plating chromium and the like to titanium, its alloys, and the like |
| US3505181A (en) * | 1963-05-29 | 1970-04-07 | Secr Defence Brit | Treatment of titanium surfaces |
| US3687741A (en) * | 1969-09-22 | 1972-08-29 | Rohr Corp | Method and solutions for treating titanium and like metals and their alloys |
| US3729392A (en) * | 1971-02-19 | 1973-04-24 | Du Pont | Plating of titanium with chromium |
| DE2434332A1 (en) * | 1974-07-17 | 1976-01-29 | Kabel Metallwerke Ghh | PROCESS FOR ELECTROLYTIC COATING OF WORKPIECES MADE OF TITANIUM WITH COPPER |
| JPS52149233A (en) * | 1976-06-08 | 1977-12-12 | Teikoku Piston Ring Co Ltd | Chromium plating method |
| US4236940A (en) * | 1979-06-12 | 1980-12-02 | United Technologies Corporation | Wear resistant titanium alloy coating |
| SU833382A1 (en) * | 1979-04-25 | 1981-05-30 | Особое Конструкторское Бюро Инсти-Тута Высоких Температур Ah Cccp | Method of soldering metals |
| EP0035241A1 (en) * | 1980-03-04 | 1981-09-09 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Method for the activation of titanium surfaces |
| FR2508935A1 (en) * | 1981-07-02 | 1983-01-07 | Sorapec Sa | Electroplating of chromium onto titanium substrates - using initial plating bath contg. fluoride which removes titanium di:oxide from surface of substrate so adherent deposit |
| US4414039A (en) * | 1981-08-21 | 1983-11-08 | Motoren-Und Turbinen-Union Munchen Gmbh | Method of activating titanium surfaces |
| DE3301703A1 (en) * | 1983-01-20 | 1984-07-26 | Bayerische Motoren Werke AG, 8000 München | Titanium electrode having a metallic coating, process for producing it and its use |
| SU1114712A1 (en) * | 1981-06-22 | 1984-09-23 | Предприятие П/Я Р-6209 | Electrolyte for chromium plating of titanium alloys |
| US4904352A (en) * | 1988-01-13 | 1990-02-27 | Microdot Inc. | Electrodeposited multilayer coating for titanium |
| JPH0625890A (en) * | 1992-02-06 | 1994-02-01 | Riken Corp | Electroplating method |
| JPH0790595A (en) * | 1993-09-13 | 1995-04-04 | Toyota Central Res & Dev Lab Inc | Plating method of titanium material |
| JP2000015304A (en) * | 1998-06-30 | 2000-01-18 | Sumitomo Metal Ind Ltd | Titanium plate excellent in glare shielding property and production thereof and work roll used to this production |
| US6039860A (en) * | 1998-11-09 | 2000-03-21 | Mcdonnell Douglas Corporation | Method for chromium plating titanium alloy |
| CN1289864A (en) * | 1999-09-28 | 2001-04-04 | 香港生产力促进局 | Surface activating process of Ti and Ti alloy for bright electroplating |
| CN1292432A (en) * | 1999-06-30 | 2001-04-25 | 三井金属鉱业株式会社 | Electro-deposition copper foil and its manufacturing method |
| CN1483857A (en) * | 2003-08-11 | 2004-03-24 | 沈阳飞机工业（集团）有限公司 | Method for plating dense chromium |
| CN101476141A (en) * | 2008-12-26 | 2009-07-08 | 中国人民解放军第五七一九工厂 | Copper electroplating technological process for titanium alloy |
| CN102051647A (en) * | 2010-12-29 | 2011-05-11 | 东莞市泰赛特汽车用品科技有限公司 | Cyanide-free nickel-free water plating process for titanium and titanium alloy |
| CN102286763A (en) * | 2011-08-25 | 2011-12-21 | 西北工业大学 | Process method for electroplating copper on TC4 titanium alloy surface |
| CN102697378A (en) * | 2012-06-20 | 2012-10-03 | 西北有色金属研究院 | Manufacturing method of titanium copper compound pot |
| CN103668357A (en) * | 2013-12-19 | 2014-03-26 | 株洲永盛电池材料有限公司 | Alkaline cyanide-free high-speed copper plating solution |
-
2014
- 2014-06-11 CN CN201410257959.3A patent/CN104005059A/en active Pending
Patent Citations (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2829091A (en) * | 1956-06-04 | 1958-04-01 | Menasco Mfg Company | Method for electroplating titanium |
| US3065154A (en) * | 1959-06-29 | 1962-11-20 | Bendix Corp | Method of plating chromium and the like to titanium, its alloys, and the like |
| US3505181A (en) * | 1963-05-29 | 1970-04-07 | Secr Defence Brit | Treatment of titanium surfaces |
| US3687741A (en) * | 1969-09-22 | 1972-08-29 | Rohr Corp | Method and solutions for treating titanium and like metals and their alloys |
| US3729392A (en) * | 1971-02-19 | 1973-04-24 | Du Pont | Plating of titanium with chromium |
| DE2434332A1 (en) * | 1974-07-17 | 1976-01-29 | Kabel Metallwerke Ghh | PROCESS FOR ELECTROLYTIC COATING OF WORKPIECES MADE OF TITANIUM WITH COPPER |
| JPS52149233A (en) * | 1976-06-08 | 1977-12-12 | Teikoku Piston Ring Co Ltd | Chromium plating method |
| SU833382A1 (en) * | 1979-04-25 | 1981-05-30 | Особое Конструкторское Бюро Инсти-Тута Высоких Температур Ah Cccp | Method of soldering metals |
| US4236940A (en) * | 1979-06-12 | 1980-12-02 | United Technologies Corporation | Wear resistant titanium alloy coating |
| EP0035241A1 (en) * | 1980-03-04 | 1981-09-09 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Method for the activation of titanium surfaces |
| US4340620A (en) * | 1980-03-04 | 1982-07-20 | Mtu Motoren-Und Turbinen-Union | Method for activating titanium surfaces for subsequent plating with metallic coatings |
| SU1114712A1 (en) * | 1981-06-22 | 1984-09-23 | Предприятие П/Я Р-6209 | Electrolyte for chromium plating of titanium alloys |
| FR2508935A1 (en) * | 1981-07-02 | 1983-01-07 | Sorapec Sa | Electroplating of chromium onto titanium substrates - using initial plating bath contg. fluoride which removes titanium di:oxide from surface of substrate so adherent deposit |
| US4414039A (en) * | 1981-08-21 | 1983-11-08 | Motoren-Und Turbinen-Union Munchen Gmbh | Method of activating titanium surfaces |
| DE3301703A1 (en) * | 1983-01-20 | 1984-07-26 | Bayerische Motoren Werke AG, 8000 München | Titanium electrode having a metallic coating, process for producing it and its use |
| US4904352A (en) * | 1988-01-13 | 1990-02-27 | Microdot Inc. | Electrodeposited multilayer coating for titanium |
| JPH0625890A (en) * | 1992-02-06 | 1994-02-01 | Riken Corp | Electroplating method |
| JPH0790595A (en) * | 1993-09-13 | 1995-04-04 | Toyota Central Res & Dev Lab Inc | Plating method of titanium material |
| JP2000015304A (en) * | 1998-06-30 | 2000-01-18 | Sumitomo Metal Ind Ltd | Titanium plate excellent in glare shielding property and production thereof and work roll used to this production |
| US6039860A (en) * | 1998-11-09 | 2000-03-21 | Mcdonnell Douglas Corporation | Method for chromium plating titanium alloy |
| CN1292432A (en) * | 1999-06-30 | 2001-04-25 | 三井金属鉱业株式会社 | Electro-deposition copper foil and its manufacturing method |
| CN1289864A (en) * | 1999-09-28 | 2001-04-04 | 香港生产力促进局 | Surface activating process of Ti and Ti alloy for bright electroplating |
| CN1483857A (en) * | 2003-08-11 | 2004-03-24 | 沈阳飞机工业（集团）有限公司 | Method for plating dense chromium |
| CN101476141A (en) * | 2008-12-26 | 2009-07-08 | 中国人民解放军第五七一九工厂 | Copper electroplating technological process for titanium alloy |
| CN102051647A (en) * | 2010-12-29 | 2011-05-11 | 东莞市泰赛特汽车用品科技有限公司 | Cyanide-free nickel-free water plating process for titanium and titanium alloy |
| CN102286763A (en) * | 2011-08-25 | 2011-12-21 | 西北工业大学 | Process method for electroplating copper on TC4 titanium alloy surface |
| CN102697378A (en) * | 2012-06-20 | 2012-10-03 | 西北有色金属研究院 | Manufacturing method of titanium copper compound pot |
| CN103668357A (en) * | 2013-12-19 | 2014-03-26 | 株洲永盛电池材料有限公司 | Alkaline cyanide-free high-speed copper plating solution |
Non-Patent Citations (2)
| Title |
|---|
| 周伟岩等: "钛合金镀铬工艺研究", 《材料保护》 * |
| 李博: "提高TC6钛合金零件镀铬层结合力的方法", 《电镀与精饰》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372392A (en) * | 2014-11-28 | 2015-02-25 | 沈阳飞机工业（集团）有限公司 | Method for improving uniformity of small-curvature semiarc-surface chromium coating |
| CN104404578A (en) * | 2014-11-28 | 2015-03-11 | 沈阳飞机工业（集团）有限公司 | Method for electrochromism processing of workpiece |
| CN107313079A (en) * | 2017-07-31 | 2017-11-03 | 安徽沃德气门制造有限公司 | A kind of automobile air valve rapid chrome plating technique |
| CN111005045A (en) * | 2019-12-31 | 2020-04-14 | 西安西工大超晶科技发展有限责任公司 | Preparation method of titanium and titanium alloy surface coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Allahyarzadeh et al. | Ni-W electrodeposited coatings: Characterization, properties and applications | |
| CN104005059A (en) | Method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy | |
| CN101580952B (en) | Non-cyanide zinc-deposited solution and non-cyanide plating method of aluminum wheel boss using non-cyanide zinc-deposited solution | |
| CN101768768B (en) | Aluminum alloy cyanide-free and nickel-free electroplating method and electroplating products thereof | |
| CN104233435B (en) | The preparation method of the convex closure shape wear-resistant chromium plating layer of spheric granules strengthening | |
| CN104308670A (en) | Ultra-precision processing method based on non-Newtonian fluid shear thickening and electrolyzing combined effect | |
| CN104772946B (en) | Plate nickel chromium triangle part and its manufacture method | |
| CN104790004A (en) | Nickel and/or chromium plated component and manufacturing method thereof | |
| CN104775142A (en) | Ultra-corrosion-resistant nickel-chromium plating component and manufacturing method thereof | |
| CN101109093A (en) | Method for electrodepositing nanocrystalline chromium-nickel alloy coating with carboxylic acid or its salt -urea impulse | |
| CN107937857B (en) | Wear-resisting composite coating of a kind of 7075 aluminium alloy surface anti-corrosions erosion and preparation method thereof | |
| CN110885996A (en) | Hardware surface treatment process and hardware | |
| CN101311322B (en) | Surface treatment process for electroplating iron-nickel alloy and electroplating solution thereof | |
| CN104005064A (en) | Method for electroplating chromium on TC6 titanium alloy and TC18 titanium alloy | |
| CN204589341U (en) | Nickel plating and or chromium parts | |
| CN110129854A (en) | A kind of preparation method and terminal device of oxidation film | |
| CN103572339B (en) | A kind of method at surface of low-carbon steel electroplated Ni-Mn alloy | |
| CN110468411A (en) | A kind of electroplating technology for diadust plating nickel on surface | |
| CN103741189A (en) | Surface treatment method for water faucets | |
| CN109487261B (en) | Method for quickly electrodepositing coating on surface of magnesium alloy | |
| CN104772947B (en) | Plate nickel chromium triangle part and its manufacture method | |
| KR20190036572A (en) | Electroplating solution for steel sheet and methods of electroplating steel sheet using the same | |
| CN102233318A (en) | Surface treatment method of Zr (zirconium)-based amorphous alloy | |
| CN104451791A (en) | Novel environment-friendly alloy catalytic liquid and preparation method thereof | |
| CN104775143A (en) | Multilayer ultra corrosion resistant nickel-chromium plating part and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140827 |