CN102747392B - Gold-plated-cobalt-base alloy technique - Google Patents
Gold-plated-cobalt-base alloy technique Download PDFInfo
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- CN102747392B CN102747392B CN201210235481.5A CN201210235481A CN102747392B CN 102747392 B CN102747392 B CN 102747392B CN 201210235481 A CN201210235481 A CN 201210235481A CN 102747392 B CN102747392 B CN 102747392B
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Abstract
The present invention relates to a kind of electroplating technology, particularly for the metallic substance such as Copper and its alloy, nickel, silver gold-plated-cobalt-base alloy technique, gold-plated-cobalt-base alloy technique, is characterized in that: comprise the steps: 1), Solvent degreasing; 2), ultrasonic oil removal; 3), wash; 4) pickling; 5) wash; 6) weak corrosion; 7) gold-plated-cobalt-base alloy, the electroplate liquid that temperature is 10 DEG C ~ 35 DEG C put into by the pending metal parts be about to after cleaning, and the PH of electroplate liquid controls between 4.8 ~ 5.4, and current density controls at 0.3A/dm
2~ 0.4A/dm
2between; Described gold-plated-cobalt-base alloy solution component is by the analytical pure potassium cyanaurite KAu (CN) of 12g/L ~ 17g/L
2, 110g/L ~ 120g/L analytical pure Triammonium citrate (NH
4)
3c
6h
5o
72H
2the analytical pure citric acid H of O, 20g/L ~ 25g/L
3c
3h
5o
7, 2g/L ~ 5g/L analytical pure sulfuric acid cobalt CoSO
47H
2o forms; 8) reclaim; 9) wash; 10) dry.It had both had outside the performance of gold, also had higher wear resistance, not easily dimmed electroplating technology.
Description
Technical field
The present invention relates to a kind of electroplating technology, particularly for the metallic substance such as Copper and its alloy, nickel, silver gold-plated-cobalt-base alloy technique, belong to field of metal surface treatment technology.
Background technology
Gold is flavous metal, and nucleidic mass is 197.2, and density is 19.3, and fusing point is 1062.7 DEG C.Auric electrochemical equivalent is 2.452g/A.h, and aurous electrochemical equivalent is 7.397 g/A.h, the standard potential ψ Au of gold
3+/ Au=1.5 lies prostrate, ψ Au
+/ Au=1.68 volt, golden ductility is good, is easy to polishing, has very high chemical stability, and Gold plated Layer erosion resistance is strong, and conduction is good, easily welds, can be high temperature resistant, improves the work-ing life of metal parts.
Current domestic craft of gilding is mainly used on electrical connector, and main Problems existing has:
1) visual appearance poor, wear no resistance, be only suitable for war products and only require that performance does not pursue the requirement of visual appearance.
2) electroplating efficiency is low, and production cost is high.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above: provide a kind of gold-plated-cobalt-base alloy technique,
It had both had outside the performance of gold, also had higher wear resistance, not easily dimmed electroplating technology.
For solving the problems of the technologies described above, the technical solution used in the present invention is: gold-plated-cobalt-base alloy technique, is characterized in that comprising the steps:
1), Solvent degreasing;
2), ultrasonic oil removal;
3), wash
4) pickling;
5) wash;
6) weak corrosion;
7) gold-plated-cobalt-base alloy, the electroplate liquid that temperature is 10 DEG C ~ 35 DEG C put into by the pending metal parts be about to after cleaning, and the PH of electroplate liquid controls between 4.8 ~ 5.4, and current density controls at 0.3A/dm
2~ 0.4A/dm
2between; Described gold-plated-cobalt-base alloy solution component is by the analytical pure potassium cyanaurite KAu (CN) of 12g/L ~ 17g/L
2, 110g/L ~ 120g/L analytical pure Triammonium citrate (NH
4)
3c
6h
5o
72H
2the analytical pure citric acid H of O, 20g/L ~ 25g/L
3c
3h
5o
7, 2g/L ~ 5g/L analytical pure sulfuric acid cobalt CoSO
47H
2o forms;
8) reclaim;
9) wash;
10) dry.
Described is soaked 3 ~ 5 minutes by magnesium alloy parts at temperature 10 DEG C ~ 35 DEG C dry clearing gasoline or other organic solvent with Solvent degreasing.
Described is, at the clean gasoline of temperature 20 DEG C or other organic solvent, magnesium alloy parts is soaked 4 minutes with Solvent degreasing.
Described ultrasonic oil removal copper and copper alloy parts is put into the equipment that chemical solvents soaks 1 ~ 5 minute when temperature is 50 DEG C ~ 55 DEG C to carry out; Described chemical solvents component is by the technical pure sodium carbonate Na of 15 ~ 25g/L
2cO
3, 15 ~ 25g/L technical pure sodium phosphate Na
3pO
4, 10 ~ 15g/L technical pure water glass Na
2siO
3composition.
Described ultrasonic oil removal copper and copper alloy parts is put into the equipment that chemical solvents soaks when temperature is 53 DEG C 3 minutes to carry out; Described electrochemical deoiling solvent composition is by the technical pure sodium carbonate Na of 20g/L
2cO
3, 20g/L technical pure sodium phosphate Na
3pO
4, 13 g/L technical pure water glass Na
2siO
3composition.
Described pickling copper and copper alloy parts is put into chemical solvents to soak 2 ~ 3 minutes when temperature 10 DEG C ~ 35 DEG C; Described chemical solvents component is by the technical pure chromic anhydride CrO of 150 ~ 200g/L
3, 15 ~ 20mL/L analytical pure sulfuric acid H
2sO
4composition.
Described pickling copper and copper alloy parts is put into chemical solvents to soak 2.5 minutes when temperature 20 DEG C; Described chemical solvents component is by the technical pure chromic anhydride CrO of 180g/L
3, 17mL/L analytical pure sulfuric acid H
2sO
4composition.
Described weak corrosion copper and copper alloy parts is put into chemical solvents to soak 2 ~ 3 minutes when temperature 10 ~ 35 DEG C; Described chemical solvents component is by the analytical pure citric acid H of 5%
3c
3h
5o
7composition.
Described weak corrosion copper and copper alloy parts is put into chemical solvents to soak 2.5 minutes when temperature 25 DEG C; Described chemical solvents component is by the analytical pure citric acid H of 5%
3c
3h
5o
7composition.
Described gold-plated-cobalt-base alloy solution component is by the potassium cyanaurite KAu (CN) of 14g/L
2, 115g/L Triammonium citrate (NH
4)
3c
6h
5o
72H
2the citric acid H of O, 23g/L
3c
3h
5o
7, 4g/L rose vitriol CoSO
47H
2o forms; Described electroplating temperature is 20 DEG C, and the PH of electroplate liquid is 5.1, and current density is 0.35A/dm
2.
The advantage of electrogilding of the present invention-cobalt-base alloy technique is: owing to have employed electrogilding of the present invention-cobalt-base alloy technique, coating is made both to have had outside the performance of gold, also there is higher wear resistance and bright property, in use not easily dimmed, more more economical than the proof gold used.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but not as a limitation of the invention.
embodiment 1
1,100 liters of electroplate liquids are prepared: by the potassium cyanaurite KAu (CN) of 14g/L
2, 115g/L Triammonium citrate (NH
4)
3c
6h
5o
72H
2the citric acid H of O, 23g/L
3c
3h
5o
7, 4g/L rose vitriol CoSO
47H
2the content of O is prepared.The distilled water of 70 liters is added, by the potassium cyanaurite of 1.4 kilograms, the Triammonium citrate of 11.5 kilograms, the citric acid of 2.3 kilograms, the rose vitriol of 0.4 kilogram in groove; , when constantly stirring, adding successively in coating bath and making it dissolve, moisturizing to 100 liter, fully stirring, can use after adjustment pH value.
2,100 liters of ultrasonic oil removal solution are prepared: by the technical pure sodium carbonate Na of 20g/L
2cO
3, 20g/L technical pure sodium phosphate Na
3pO
4, 13 g/L technical pure water glass Na
2siO
3content prepare.2 kilograms of sodium carbonate, 2 kg of phosphoric acid sodium, 1.3 kilograms of water glass being added successively when constantly stirring in the distilled water that (60 ~ 80) rise, until completely dissolved, adding water to 100 liters, stirring, can use.
3,100 liters of pickle solutions are prepared: by the technical pure chromic anhydride CrO of 180g/L
3, 17mL/L analytical pure sulfuric acid H
2sO
4content prepare.In groove, add the distilled water of 40 liters, the chromic anhydride of 18 kilograms is added stirring in groove and make it dissolve and then add 1.7 liters of sulfuric acid, add distilled water to 100 liter, stir, can use.
4, electrogilding-cobalt-base alloy technique:
By metal parts in turn through 1), with Solvent degreasing: it is, at the clean gasoline of temperature 20 DEG C or other organic solvent, plated part is soaked 4 minutes, the screw thread larger for greasy dirt or stria shape part can brush away greasy dirt with fine, soft fur brush, are dried up by magnesium alloy material part after oil removing with pressurized air; 2), ultrasonic oil removal: plated part is put into the above-mentioned ultrasonic oil removal solvent prepared that temperature is 53 DEG C, soak 3 minutes; 3), wash: the hot water wash first using 85 °, rinsing with the water of flowing; 4), pickling: plated part is put into the above-mentioned chemical solvents prepared, soaks 2.5 minutes when temperature 20 DEG C; 5) wash: rinse with the water of flowing; 6) weak corrosion: plated part being placed on mass percent concentration is in the citric acid solution of 5%, soaks 2.5 minutes during temperature 20 DEG C; 7) gold-plated-cobalt-base alloy, immediately the pending part after weak corrosion is put into the electroplate liquid that temperature is the above-mentioned preparation of 23 DEG C, the PH of electroplate liquid is 5.1, and current density controls at 0.35A/dm
2.8) reclaim; 9) wash: rinse with flowing water; 10) dry.
The performance of 5, gold-cobalt-base alloy coating meets the related request of gold plate in SJ1276.
embodiment 2
1,100 liters of electroplate liquids are prepared: by the potassium cyanaurite KAu (CN) of 12g/L
2, 110g/L Triammonium citrate (NH
4)
3c
6h
5o
72H
2the citric acid H of O, 20g/L
3c
3h
5o
7, 2g/L rose vitriol CoSO
47H
2the content of O is prepared.The distilled water of 70 liters is added, by the potassium cyanaurite of 1.2 kilograms, the Triammonium citrate of 11 kilograms, the citric acid of 2 kilograms, the rose vitriol of 0.2 kilogram in groove; , when constantly stirring, adding successively in coating bath and making it dissolve, moisturizing to 100 liter, fully stirring, can use after adjustment pH value.
2,100 liters of ultrasonic oil removal solution are prepared: by the technical pure sodium carbonate Na of 15g/L
2cO
3, 15g/L technical pure sodium phosphate Na
3pO
4, 10 g/L technical pure water glass Na
2siO
3content prepare.1.5 kilograms of sodium carbonate, 1.5 kg of phosphoric acid sodium, 1 kilogram of water glass being added successively when constantly stirring in the distilled water that (60 ~ 80) rise, until completely dissolved, adding water to 100 liters, stirring, can use.
3,100 liters of pickle solutions are prepared: by the technical pure chromic anhydride CrO of 150g/L
3, 15mL/L analytical pure sulfuric acid H
2sO
4content prepare.In groove, add the distilled water of 40 liters, the chromic anhydride of 15 kilograms is added stirring in groove and make it dissolve and then add 1.5 liters of sulfuric acid, add distilled water to 100 liter, stir, can use.
4, electrogilding-cobalt-base alloy technique:
By metal parts in turn through 1), with Solvent degreasing: it is, at the clean gasoline of temperature 10 DEG C or other organic solvent, plated part is soaked 3 minutes, the screw thread larger for greasy dirt or stria shape part can brush away greasy dirt with fine, soft fur brush, are dried up by magnesium alloy material part after oil removing with pressurized air; 2), ultrasonic oil removal: plated part is put into the above-mentioned ultrasonic oil removal solvent prepared that temperature is 50 DEG C, soak 1 minute; 3), wash: the hot water wash first using 80 °, rinsing with the water of flowing; 4), pickling: plated part is put into the above-mentioned chemical solvents prepared, soaks 2 minutes when temperature 10 DEG C; 5) wash: rinse with the water of flowing; 6) weak corrosion: plated part being placed on mass percent concentration is in the citric acid solution of 5%, soaks 2 minutes during temperature 10 DEG C; 7) gold-plated-cobalt-base alloy, immediately the pending part after weak corrosion is put into the electroplate liquid that temperature is the above-mentioned preparation of 20 DEG C, the PH of electroplate liquid is 4.8, and current density controls at 0.2A/dm
2.8) reclaim; 9) wash: rinse with flowing water; 10) dry.
The performance of 5, gold-cobalt-base alloy coating meets the related request of gold plate in SJ1276.
embodiment 3
1,100 liters of electroplate liquids are prepared: by the potassium cyanaurite KAu (CN) of 17g/L
2, 120g/L Triammonium citrate (NH
4)
3c
6h
5o
72H
2the citric acid H of O, 25g/L
3c
3h
5o
7, 5g/L rose vitriol CoSO
47H
2the content of O is prepared.The distilled water of 70 liters is added, by the potassium cyanaurite of 1.7 kilograms, the Triammonium citrate of 12 kilograms, the citric acid of 2.5 kilograms, the rose vitriol of 0.5 kilogram in groove; , when constantly stirring, adding successively in coating bath and making it dissolve, moisturizing to 100 liter, fully stirring, can use after adjustment pH value.
2,100 liters of ultrasonic oil removal solution are prepared: by the technical pure sodium carbonate Na of 25g/L
2cO
3, 25g/L technical pure sodium phosphate Na
3pO
4, 15 g/L technical pure water glass Na
2siO
3content prepare.2.5 kilograms of sodium carbonate, 2.5 kg of phosphoric acid sodium, 1.5 kilograms of water glass being added successively when constantly stirring in the distilled water that (60 ~ 80) rise, until completely dissolved, adding water to 100 liters, stirring, can use.
3,100 liters of pickle solutions are prepared: by the technical pure chromic anhydride CrO of 200g/L
3, 20mL/L analytical pure sulfuric acid H
2sO
4content prepare.In groove, add the distilled water of 40 liters, the chromic anhydride of 20 kilograms is added stirring in groove and make it dissolve and then add 2 liters of sulfuric acid, add distilled water to 100 liter, stir, can use.
4, electrogilding-cobalt-base alloy technique:
By metal parts in turn through 1), with Solvent degreasing: it is, at the clean gasoline of temperature 35 DEG C or other organic solvent, plated part is soaked 5 minutes, the screw thread larger for greasy dirt or stria shape part can brush away greasy dirt with fine, soft fur brush, are dried up by magnesium alloy material part after oil removing with pressurized air; 2), ultrasonic oil removal: plated part is put into the above-mentioned ultrasonic oil removal solvent prepared that temperature is 55 DEG C, soak 5 minutes; 3), wash: the hot water wash first using 95 °, rinsing with the water of flowing; 4), pickling: plated part is put into the above-mentioned chemical solvents prepared, soaks 3 minutes when temperature 35 DEG C; 5) wash: rinse with the water of flowing; 6) weak corrosion: be placed in the citric acid solution of 5% by plated part, soaks 3 minutes during temperature 35 DEG C; 7) gold-plated-cobalt-base alloy, immediately the pending part after weak corrosion is put into the electroplate liquid that temperature is the above-mentioned preparation of 35 DEG C, the PH of electroplate liquid is 5.2, and current density controls at 0.5A/dm
2.8) reclaim; 9) wash: rinse with flowing water; 10) dry.
The performance of 5, gold-cobalt-base alloy coating meets the related request of gold plate in SJ1276.
Because above-described embodiment have employed electrogilding of the present invention-cobalt-base alloy technique, part coating was both had outside the performance of gold, also there is higher wear resistance, in use not easily dimmed, than the proof gold economy used.
All there is sale in above-mentioned chemical reagent market.
Same thickness (2 μ) Gold plated Layer compares with golden cobalt coating performance and sees the following form:
| Coating performance | Gold-plated | Gold-plated cobalt-base alloy |
| Outward appearance | Golden yellow | Light is golden yellow |
| Density (g/cm3) | 19 | 17.3 |
| Hardness (Hv) | 170~190 | 200~220 |
| Wear resistance (turning) | 5000 | 20000 |
| Cost | High | Lower |
Claims (1)
1. gold-plated-cobalt-base alloy technique, is characterized in that: comprise the steps:
1) Solvent degreasing; Described Solvent degreasing is, at temperature 20 DEG C dry clearing gasoline or other organic solvent, copper and copper alloy parts is soaked 4 minutes;
2) ultrasonic oil removal; Described ultrasonic oil removal is put into by copper and copper alloy parts to fill chemical solvents equipment and soak 3 minutes when temperature is 53 DEG C;
Described chemical solvents component is by the technical pure sodium carbonate Na of 20g/L
2cO
3, 20g/L technical pure sodium phosphate Na
3pO
4, 13 g/L technical pure water glass Na
2siO
3form with distilled water;
3) wash;
4) pickling; Described pickling copper and copper alloy parts is put into chemical solvents to soak 2.5 minutes when temperature 20 DEG C; Described chemical solvents component is by the technical pure chromic anhydride CrO of 180g/L
3, 17mL/L analytical pure sulfuric acid H
2sO
4form with distilled water;
5) wash;
6) weak corrosion; Described weak corrosion copper and copper alloy parts is put into chemical solvents to soak 2.5 minutes when temperature 25 DEG C; Described chemical solvents component is by analytical pure citric acid H
3c
6h
5o
7with distilled water composition, wherein, analytical pure citric acid H
3c
6h
5o
7mass percent is 5%;
7) gold-plated-cobalt-base alloy, the electroplate liquid that temperature is 10 DEG C ~ 35 DEG C put into by the pending metal parts be about to after cleaning, and the pH of electroplate liquid controls 5.1, and current density controls at 0.35A/dm
2; Described bath components is by the potassium cyanaurite KAu (CN) of 14g/L
2, 115g/L Triammonium citrate (NH
4)
3c
6h
5o
72H
2the citric acid H of O, 23g/L
3c
6h
5o
7, 4g/L rose vitriol CoSO
47H
2o and distilled water composition;
8) reclaim;
9) wash;
10) dry.
Priority Applications (1)
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|---|---|---|---|
| CN201210235481.5A CN102747392B (en) | 2012-07-09 | 2012-07-09 | Gold-plated-cobalt-base alloy technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210235481.5A CN102747392B (en) | 2012-07-09 | 2012-07-09 | Gold-plated-cobalt-base alloy technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102747392A CN102747392A (en) | 2012-10-24 |
| CN102747392B true CN102747392B (en) | 2015-09-30 |
Family
ID=47027867
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|---|---|---|---|
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4591415A (en) * | 1983-12-22 | 1986-05-27 | Learonal, Inc. | Plating baths and methods for electro-deposition of gold or gold alloys |
| CN1940148A (en) * | 2005-09-30 | 2007-04-04 | 关东化学株式会社 | Plated film of gold-cobalt amorphous alloy, electroplating bath, and method for electroplating |
| CN101165220A (en) * | 2006-08-21 | 2008-04-23 | 罗门哈斯电子材料有限公司 | A hard gold alloy plating bath |
-
2012
- 2012-07-09 CN CN201210235481.5A patent/CN102747392B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4591415A (en) * | 1983-12-22 | 1986-05-27 | Learonal, Inc. | Plating baths and methods for electro-deposition of gold or gold alloys |
| CN1940148A (en) * | 2005-09-30 | 2007-04-04 | 关东化学株式会社 | Plated film of gold-cobalt amorphous alloy, electroplating bath, and method for electroplating |
| CN101165220A (en) * | 2006-08-21 | 2008-04-23 | 罗门哈斯电子材料有限公司 | A hard gold alloy plating bath |
Non-Patent Citations (4)
| Title |
|---|
| "无氰电镀22K金工艺研究";梁成浩等;《材料保护》;20071015;第40卷(第10期);第23-24页 * |
| "金钴电镀液的分析";刘群;《机电元件》;19871231;第7卷(第4期);第52页 * |
| 张允诚等.电镀.《电镀手册》.国防工业出版社,2007,(第3版),第97、120-121页. * |
| 曾华梁等.电镀前处理.《电镀工艺手册》.机械工业出版社,2002,(第2版),第28-29页. * |
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Effective date of registration: 20160829 Address after: 710000, No. 35 middle Changle Road, Xi'an, Shaanxi (No. 147 workshop) Patentee after: Xi'an Xiguang Surface Finishing Co., Ltd. Address before: 710043 Changle Middle Road, Shaanxi, China, No. 35, No. Patentee before: North Electro-Optics Group Co.,Ltd. |