CN107604394A - A kind of silver-colored electroplate liquid - Google Patents
A kind of silver-colored electroplate liquid Download PDFInfo
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- CN107604394A CN107604394A CN201710915776.XA CN201710915776A CN107604394A CN 107604394 A CN107604394 A CN 107604394A CN 201710915776 A CN201710915776 A CN 201710915776A CN 107604394 A CN107604394 A CN 107604394A
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- silver
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- electroplate liquid
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Abstract
The invention discloses a kind of silver-colored electroplate liquid, including aqueous solvent, 20 100g/L main salt, 40 120g/L conducting salt, 4 7g/L additive, 0.2 0.7g/L brightener, 12 20g/L buffer, 40 200g/L complexing agent, wherein, the complexing agent is 2,5 diketopiperazines or derivatives thereof.The plating solution for silver-plating formula of the present invention is simple, and toxicity is extremely low or nontoxic, and stability is good, depositing homogeneous, and surface appearance and bright in mirror surface effect are good；Plating conditions are gentle, are easily managed operation and realize, are influenceed by current density smaller；The Ag films good corrosion resistance of plating；Plating piece is without pre- silver-plated or leaching silver；Binding force of cladding material is good and bright, meets the multi-field application such as decorative electroplating and functional plating.
Description
Technical field
The present invention relates to electroplate liquid, more particularly to a kind of silver-colored electroplate liquid.
Background technology
Silver has white gloss, and chemical property is stable, and heat conduction, electric conductivity are fine, are not easy to be corroded by chemicals, to having
The chemical stability of machine bronsted lowry acids and bases bronsted lowry is high, and matter is soft, rich ductility, and price is relatively inexpensive with respect to other noble metals, and its reflecting rate is high, can
Up to more than 99%, it is widely used in the fields such as ornament, tableware and electronic products.
Electrosilvering technique in electroplating industry is more ripe, and cyanogen silver plating process endangers the mankind, and health, environmental pollution is serious.With
The reinforcement of environmental consciousness, non-cyanide silver coating is more and more concerned, but the electroplate liquid stability of non-cyanide silver coating is poor, to management and operation
Make troubles, and plating solution for silver-plating is unable to uniform deposition silver coating, and surface topography is poor, they generally deposit lacklustre silver layer；
And plating piece needs pre- silver-plated or leaching silver when electroplating, and increases cost.When the electrolysis such as the connector of computer and communication apparatus are electroplated,
It is the film that 0.2-2 μm or so of thickness is formed on the tiny segment of blank, when connector end sub-portion carries out electrolysis plating, electricity
Stream concentrates on the top ends of terminal, easily produces the thick crisp so-called sintered deposit (burnt deposits) of plated film or plating tunic
The uneven electro-deposition on surface, in order to avoid this phenomenon, current density need to be controlled in prescribed limit, thus needed
Plating conditions are strictly limited, difficulty is brought to operating aspect.
The content of the invention
Goal of the invention：The invention provides a kind of silver-colored electroplate liquid, solve that bath stability is poor, deposition is uneven, needs
The problem of pre- silver-plated or leaching is silver-colored, while the problem of avoid strict control electric current density, operational administrative inconvenience during plating.
Technical scheme：A kind of silver-colored electroplate liquid of the present invention, include aqueous solvent, 20-100g/L main salt, 40-120g/L
Conducting salt, 4-7g/L additive, 0.2-0.7g/L brightener, 12-20g/L buffer, 40-200g/L complexing
Agent, wherein, the complexing agent is the structure in below formula,
Wherein, R is selected from H, C1-C5 alkyl, C2-C7 alkenyls and aryl.
The main salt is one or both of the organic salt of silver ion and inorganic salts.
The inorganic salts of the silver ion are silver nitrate and/or silver chlorate.
The organic salt of the silver ion is pyrovinic acid silver.
The conducting salt is the one or more in potassium sulfate, potassium chlorate, ammonium sulfate and ammonium chloride.
The additive is ethylenediamine, EDTA, Diethylenetriamine, three second tetramines, tetren and five second hexamines
In one or more.
The brightener is the one or more in sodium thiosulfate, potassium rhodanide and furans.
The buffer be boric acid, butanedioic acid, phthalic acid, tartaric acid, citric acid, phosphoric acid and sulfurous acid in one kind or
It is several.
Beneficial effect：1st, plating solution for silver-plating of the invention formula is simple, and toxicity is extremely low or nontoxic, and stability is good, depositing homogeneous,
Surface appearance and bright in mirror surface effect are good；2nd, plating conditions are gentle, be easily managed operation realize, by current density influenceed compared with
It is small；3rd, the Ag films good corrosion resistance of plating；4th, plating piece is without pre- silver-plated or leaching silver；5th, binding force of cladding material is good and bright, full
The multi-field applications such as sufficient decorative electroplating and functional plating.
Embodiment
Embodiment 1
Thin-wall copper pipe is electroplated in electroplating bath, in electroplating bath electroplate liquid include aqueous solvent, 20g/L silver nitrate,
40g/L potassium sulfate, 4g/L ethylenediamine, 0.2g/L sodium thiosulfate, 12g/L boric acid, 40g/L complexing agent, wherein,
The complexing agent is following structure,
The pH value of plating solution is 6.5 in electroplating bath, current density 14A/dm2, temperature is 47 DEG C, electroplating time 7 minutes.
After the completion of plating, the silver layer brightness effect of plating is good, homogeneity is high, phenomena such as pin-free, stain；Foundation
ASTMB571 standards, the copper pipe for electroplating silvering is heated to 240-260 DEG C in stove, then taken out cold in the water for be put into room temperature
But, silvering does not have bubbling or come off, and illustrates that silver layer is qualified with substrate combinating strength；Silver coating copper pipe does neutral salt spray test 8
Hour, have no that silver layer corrodes；Clean above-mentioned silver plating sample at room temperature with deionized water and air-dry, specular light occurs in sample
It is bright.
Embodiment 2
Rectangle iron plate is electroplated in electroplating bath, electroplate liquid includes the chlorination of aqueous solvent, 40g/L in electroplating bath
Silver, the complexing of 60g/L potassium chlorate, 5g/L tetren, 0.3g/L sodium thiosulfate, 13g/L citric acid, 80g/L
Agent, wherein, the complexing agent is following structure,
The pH value of plating solution is 7.5 in electroplating bath, current density 7A/dm2, temperature is 25 DEG C, electroplating time 12 minutes.
After the completion of plating, the silver layer brightness effect of plating is good, homogeneity is high, phenomena such as pin-free, stain；Foundation
ASTMB571 standards, the iron plate for electroplating silvering is heated to 240-260 DEG C in stove, then taken out cold in the water for be put into room temperature
But, silvering does not have bubbling or come off, and illustrates that silver layer is qualified with substrate combinating strength；Silver coating iron plate is cooked neutral salt spray test 8
Hour, have no that silver layer corrodes；Clean above-mentioned silver plating sample at room temperature with deionized water and air-dry, specular light occurs in sample
It is bright.
Embodiment 3
Iron block with some deep holes and blind hole is electroplated in electroplating bath, electroplate liquid includes solvent in electroplating bath
Water, 60g/L silver chlorate, 80g/L ammonium sulfate, 5.5g/L EDTA, 0.4g/L potassium rhodanide, 15g/L
The complexing agent of tartaric acid, 120g/L, wherein, the complexing agent is following structure,
The pH value of plating solution is 7 in electroplating bath, current density 2A/dm2, temperature is 57 DEG C, electroplating time 5 minutes.
After the completion of plating, the silver layer brightness effect of plating is good, homogeneity is high, phenomena such as pin-free, stain；Foundation
ASTMB571 standards, the iron block for electroplating silvering is heated to 240-260 DEG C in stove, then taken out cold in the water for be put into room temperature
But, silvering does not have bubbling or come off, and illustrates that silver layer is qualified with substrate combinating strength；Silver coating iron block does neutral salt spray test 8
Hour, have no that silver layer corrodes；Clean above-mentioned silver plating sample at room temperature with deionized water and air-dry, specular light occurs in sample
It is bright；And prove for there is the plating piece of tiny deep hole or blind hole to obtain the preferable plate surface of quality.
Embodiment 4
Hollow annular copper sheet electroplated in electroplating bath, electroplate liquid includes aqueous solvent, 80g/L in electroplating bath
Silver nitrate, 100g/L ammonium chloride, 6g/L three second tetramines, 0.5g/L potassium rhodanide, 17g/L butanedioic acid, 160g/L
Complexing agent, wherein, the complexing agent is following structure,
The pH value of plating solution is 9.5 in electroplating bath, current density 20A/dm2, temperature is 70 DEG C, electroplating time 17 minutes.
After the completion of plating, the silver layer brightness effect of plating is good, homogeneity is high, phenomena such as pin-free, stain；Foundation
ASTMB571 standards, the copper sheet for electroplating silvering is heated to 240-260 DEG C in stove, then taken out cold in the water for be put into room temperature
But, silvering does not have bubbling or come off, and illustrates that silver layer is qualified with substrate combinating strength；Silver coating copper sheet does neutral salt spray test 8
Hour, have no that silver layer corrodes；Clean above-mentioned silver plating sample at room temperature with deionized water and air-dry, specular light occurs in sample
It is bright；And prove that for complex-shaped plating piece the preferable plate surface of quality can be obtained.
Embodiment 5
The bolt of carbon steel material electroplated in electroplating bath, electroplate liquid includes aqueous solvent, 100g/L in electroplating bath
Pyrovinic acid silver, the complexing of 120g/L ammonium sulfate, 7g/L ethylenediamine, 0.7g/L furans, 20g/L boric acid, 200g/L
Agent, wherein, the complexing agent is following structure,
The pH value of plating solution is 8 in electroplating bath, current density 17A/dm2, temperature is 34 DEG C, electroplating time 10 minutes.
After the completion of plating, the silver layer brightness effect of plating is good, homogeneity is high, phenomena such as pin-free, stain；Foundation
ASTMB571 standards, the bolt for electroplating silvering is heated to 240-260 DEG C in stove, then taken out cold in the water for be put into room temperature
But, silvering does not have bubbling or come off, and illustrates that silver layer is qualified with substrate combinating strength；Silver coating bolt does neutral salt spray test 8
Hour, have no that silver layer corrodes；Clean above-mentioned silver plating sample at room temperature with deionized water and air-dry, specular light occurs in sample
It is bright；And prove that for complex-shaped plating piece the preferable plate surface of quality can be obtained.
Claims (8)
- A kind of 1. silver-colored electroplate liquid, it is characterised in that：Including aqueous solvent, 20-100g/L main salt, 40-120g/L conducting salt, 4-7g/L additive, 0.2-0.7g/L brightener, 12-20g/L buffer, 40-200g/L complexing agent, wherein, institute Complexing agent is stated as the structure in below formula,Wherein, R is selected from H, C1-C5 alkyl, C2-C7 alkenyls and aryl.
- 2. the electroplate liquid of nickel according to claim 1, it is characterised in that：The main salt is the organic salt and nothing of silver ion One or both of machine salt.
- 3. the electroplate liquid of nickel according to claim 2, it is characterised in that：The inorganic salts of the silver ion are silver nitrate And/or silver chlorate.
- 4. the electroplate liquid of nickel according to claim 2, it is characterised in that：The organic salt of the silver ion is pyrovinic acid Silver.
- 5. the electroplate liquid of nickel according to claim 1, it is characterised in that：The conducting salt is potassium sulfate, potassium chlorate, sulfuric acid One or more in ammonium and ammonium chloride.
- 6. the electroplate liquid of nickel according to claim 1, it is characterised in that：The additive is ethylenediamine, ethylenediamine tetraacetic vinegar One or more in acid, Diethylenetriamine, three second tetramines, tetren and five second hexamines.
- 7. the electroplate liquid of nickel according to claim 1, it is characterised in that：The brightener is sodium thiosulfate, thiocyanic acid One or more in potassium and furans.
- 8. the electroplate liquid of nickel according to claim 1, it is characterised in that：The buffer is boric acid, butanedioic acid, benzene diformazan One or more in acid, tartaric acid, citric acid, phosphoric acid and sulfurous acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710915776.XA CN107604394A (en) | 2017-09-29 | 2017-09-29 | A kind of silver-colored electroplate liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710915776.XA CN107604394A (en) | 2017-09-29 | 2017-09-29 | A kind of silver-colored electroplate liquid |
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| Publication Number | Publication Date |
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| CN107604394A true CN107604394A (en) | 2018-01-19 |
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| CN201710915776.XA Withdrawn CN107604394A (en) | 2017-09-29 | 2017-09-29 | A kind of silver-colored electroplate liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113176A (en) * | 2021-04-25 | 2021-07-13 | 天津泰利德线缆有限公司 | Polyurethane sheath wire for electroplating roller |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070284258A1 (en) * | 2006-06-09 | 2007-12-13 | Masakazu Yoshimoto | Method For Silver Plating |
| CN101092724A (en) * | 2007-07-13 | 2007-12-26 | 福州大学 | Non-cyanogen type electroplating solution for plating silver |
| CN101225536A (en) * | 2006-11-01 | 2008-07-23 | 恩伊凯慕凯特股份有限公司 | Gold-silver alloy electroplating solution |
| CN101260549A (en) * | 2007-12-19 | 2008-09-10 | 福州大学 | Non-preplating type non-cyanide silver-plating electroplate liquid |
| CN101665963A (en) * | 2009-09-23 | 2010-03-10 | 福建师范大学 | Environmental non-cyanide plating solution for silver-plating |
| CN102268701A (en) * | 2011-08-02 | 2011-12-07 | 南京大学 | Non-cyanide bright silver electroplating bath and preparation method thereof |
| CN102409373A (en) * | 2010-09-21 | 2012-04-11 | 罗门哈斯电子材料有限公司 | Cyanide-free silver electroplating solutions |
| CN103806060A (en) * | 2012-11-12 | 2014-05-21 | 无锡三洲冷轧硅钢有限公司 | Electroplating method of improving binding force of silver coating and matrix |
-
2017
- 2017-09-29 CN CN201710915776.XA patent/CN107604394A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070284258A1 (en) * | 2006-06-09 | 2007-12-13 | Masakazu Yoshimoto | Method For Silver Plating |
| CN101225536A (en) * | 2006-11-01 | 2008-07-23 | 恩伊凯慕凯特股份有限公司 | Gold-silver alloy electroplating solution |
| CN101092724A (en) * | 2007-07-13 | 2007-12-26 | 福州大学 | Non-cyanogen type electroplating solution for plating silver |
| CN101260549A (en) * | 2007-12-19 | 2008-09-10 | 福州大学 | Non-preplating type non-cyanide silver-plating electroplate liquid |
| CN101665963A (en) * | 2009-09-23 | 2010-03-10 | 福建师范大学 | Environmental non-cyanide plating solution for silver-plating |
| CN102409373A (en) * | 2010-09-21 | 2012-04-11 | 罗门哈斯电子材料有限公司 | Cyanide-free silver electroplating solutions |
| CN102268701A (en) * | 2011-08-02 | 2011-12-07 | 南京大学 | Non-cyanide bright silver electroplating bath and preparation method thereof |
| CN103806060A (en) * | 2012-11-12 | 2014-05-21 | 无锡三洲冷轧硅钢有限公司 | Electroplating method of improving binding force of silver coating and matrix |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113176A (en) * | 2021-04-25 | 2021-07-13 | 天津泰利德线缆有限公司 | Polyurethane sheath wire for electroplating roller |
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Application publication date: 20180119 |
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