CN101949043A - Formulation for electroplating black rhodium layer and method thereof - Google Patents
Formulation for electroplating black rhodium layer and method thereof Download PDFInfo
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- CN101949043A CN101949043A CN 201010276968 CN201010276968A CN101949043A CN 101949043 A CN101949043 A CN 101949043A CN 201010276968 CN201010276968 CN 201010276968 CN 201010276968 A CN201010276968 A CN 201010276968A CN 101949043 A CN101949043 A CN 101949043A
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- rhodium
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- sulfuric acid
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Abstract
The invention belongs to electroplating technologies, and in particular relates to a rhodium-plating solution formulation used for electroplating a black rhodium coat on a metal surface. Aiming at solving the problems of poor repeatability of operation conditions, difficult mass production, poor abrasion resistance of formed nickel and chrome plating coats, limited corrosion resistant capabilities, bad fogging, brightness and anti-tarnishing performance, and the like in the traditional black plating coat electroplating process, the invention provides a rhodium-plating solution. The rhodium-plating solution comprises the components of rhodium sulfate, sulfuric acid and benzenesulfonic acid. In the invention, the black rhodium coat is formed by utilizing additives of benzamide, m-methyl benzaldehyde and o-methyl benzoyl chloride, and the like. The invention discloses a method for electroplating the black rhodium coat on the metal surface at the same time.
Description
Technical field
The invention belongs to electroplating technology, relate in particular to a kind of rhodanizing liquid formula that is used for electroplating black rhodium layer in the metallic surface, and a kind of method of electroplating black rhodium layer in the metallic surface.
Background technology
As everyone knows, black has good delustring heat absorptivity.In modern industry, there have a large amount of product needed melanism to eliminate to be reflective, changes thermal characteristics.The product of melanism has good sun power and selects absorptivity, can be widely used in the solar heat-collection plate, to obtain good energy-saving effect.In addition, also used the black coating product widely in industries such as photograph, optical device, surgery instrument and auto parts.The black coating product also extensively is present in the ornament industry.Along with people are more and more higher to the aesthetical standard of ornament, compared to golden yellow, silvery white, black becomes the decorative colors of a kind of novelty, uniqueness gradually, and therefore, black coating also is widely used in the bullion industry.
At present, using maximum black coatings mainly is black nickel and black chromium.But there are a series of problems in they in electroplating technology, such as the operational condition poor repeatability, produce in batches difficulty etc.In addition, the wearing no resistance of black nickel, chromium layer, resistance to corrosion is limited, and coating sends out mist, and light, discoloration-resisting are also relatively poor, can not satisfy the requirement of advanced scientific instrument, and potentiality deficiency in the ornament industry develops limited.Therefore, the black coating that develop a kind of excellent property is essential.
Black rhodanizing fluidity can be stablized, and technology is simple, good operability, and the coating hardness height, wear resistance is good, and erosion resistance is good, can solve an above difficult problem.In addition, the stable performance of black rhodium layer, anti-discoloration is good, is fit to ornament and electronics, opticinstrument electroplating surface.
Prior art about the rhodium plating bath mainly concentrates in the preparation of rhodium sulfate at present, does not still have patent and bibliographical information about the research of rhodium solution additive.
Summary of the invention
For this reason, the present invention's first technical problem that will solve provides the some kinds of rhodanizing liquid that are used to electroplate black rhodium layer.
Second technical problem that the present invention solves provides a kind of method of electroplating black rhodium layer.
For solving first technical problem, the invention provides a kind of rhodanizing liquid.Described rhodanizing fluid component comprises:
Rhodium sulfate, its concentration are 1.5-5g/L;
Sulfuric acid, its volumetric concentration are 5-30ml/L;
Phenylsulfonic acid, its volumetric concentration are 5-30ml/L, and sulfuric acid and Phenylsulfonic acid total volume concentration are no more than 40ml/L;
Benzamide, its concentration be 0.1-2g/L and
Between tolyl aldehyde, its concentration is 0.1-2g/L.
The present invention also provides a kind of rhodanizing liquid.Described rhodanizing fluid component comprises:
Rhodium sulfate, its concentration are 1.5-5g/L;
Sulfuric acid, its volumetric concentration are 5-30ml/L;
Phenylsulfonic acid, its volumetric concentration are 5-30ml/L, and sulfuric acid and Phenylsulfonic acid total volume concentration are no more than 40ml/L;
Benzamide, its concentration be 0.1-2g/L and
O-methyl-benzene formyl chloride, its concentration are 0.1-2g/L.
The present invention also provides a kind of rhodanizing liquid.Described rhodanizing fluid component comprises:
Rhodium sulfate, its concentration are 1.5-5g/L;
Sulfuric acid, its volumetric concentration are 5-30ml/L;
Phenylsulfonic acid, its volumetric concentration are 5-30ml/L, and sulfuric acid and Phenylsulfonic acid total volume concentration are no more than 40ml/L;
Benzamide, its concentration are 0.1-2g/L;
Between tolyl aldehyde and o-methyl-benzene formyl chloride, and a tolyl aldehyde and o-methyl-benzene formyl chloride total concn are 0.1-2g/L.
For solving second technical problem, the invention provides a kind of method of electroplating black rhodium layer.Described method can be used above-mentioned various rhodanizing liquid, and anode is selected from least a in platinum, platinized titanium, titanium, the rhodium; Electroplating temperature is controlled at 30-80 ℃; Electroplating current density is 5-18A/dm
2Electroplating time is 0.5-18 minute.
In the electroplating process, plating piece is preferably charged goes into groove.
And, in the electroplating process, can stir described rhodanizing liquid simultaneously.
Various rhodanizing liquid of the present invention, and use electro-plating method of the present invention to carry out the rhodium plating layer following benefit is arranged:
1. electroplate with above-mentioned various rhodanizing liquid, the rhodium coating that is obtained all turns black.And benzamide, the interpolation concentration of tolyl aldehyde and o-methyl-benzene formyl chloride etc. is high more, and electric current is big more, and coating is black more.
2. rhodanizing liquid formula of the present invention is simple, and formed bath stability is convenient to electroplating operations.And with respect to prior art, the good reproducibility of operational condition of the present invention.
3. adopt rhodanizing liquid of the present invention, and the rhodium coating light that method obtained, anti-discoloration is good.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Embodiment 1:
Make water as solvent preparation rhodanizing liquid.Rhodanizing liquid contains in the present embodiment:
Rhodium sulfate, its concentration are 2g/L;
Sulfuric acid, its volumetric concentration are 20ml/L;
Phenylsulfonic acid, its volumetric concentration are 20ml/L;
Benzamide, its concentration be 1g/L and
Between tolyl aldehyde, its concentration is 2g/L.
When using above-mentioned rhodanizing liquid to electroplate, temperature control can be at 40 ℃, and electroplating current density is at 10A/dm2, electroplating time: 2 minutes, plating piece is charged went into groove, electroplates and stirs rhodanizing liquid simultaneously.
Embodiment 2:
Make water as solvent preparation rhodanizing liquid.Rhodanizing liquid contains in the present embodiment:
Rhodium sulfate, its concentration are 1.8g/L;
Sulfuric acid, its volumetric concentration are 10ml/L;
Phenylsulfonic acid, its volumetric concentration are 10ml/L;
Benzamide, its concentration be 1g/L and
O-methyl-benzene. formyl chloride, its concentration are 2g/L.
When using above-mentioned rhodanizing liquid to electroplate, temperature control can be at 40 ℃, and electroplating current density is at 10A/dm
2, electroplating time: 2 minutes, plating piece is charged went into groove, electroplates and stirs rhodanizing liquid simultaneously.
Embodiment 3:
Make water as solvent preparation rhodanizing liquid.Rhodanizing liquid contains in the present embodiment:
Rhodium sulfate, its concentration are 1.8g/L;
Sulfuric acid, its volumetric concentration are 10ml/L;
Phenylsulfonic acid, its volumetric concentration are 10ml/L;
Benzamide, its concentration are 1g/L;
Between tolyl aldehyde, its concentration is 1g/L; With
O-methyl-benzene formyl chloride, its concentration are 1g/L.
When using above-mentioned rhodanizing liquid to electroplate, temperature control can be at 40 ℃, and electroplating current density is at 10A/dm
2, electroplating time: 2 minutes, plating piece is charged went into groove, electroplates and stirs rhodanizing liquid simultaneously.
Various rhodanizing liquid of the present invention, and use electro-plating method of the present invention to carry out the rhodium plating layer following benefit is arranged:
1. electroplate with above-mentioned various rhodanizing liquid, the rhodium coating that is obtained all turns black.And benzamide, the interpolation concentration of tolyl aldehyde and o-methyl-benzene formyl chloride etc. is high more, and electric current is big more, and coating is black more.
2. rhodanizing liquid formula of the present invention is simple, and formed bath stability is convenient to electroplating operations.And with respect to prior art, the good reproducibility of operational condition of the present invention.
3. adopt rhodanizing liquid of the present invention, and the rhodium coating light that method obtained, anti-discoloration is good.
Be noted that; above-mentioned explanation only is the detailed description to preferred embodiment of the present invention; narration only is explanation realizability of the present invention and outstanding effect thereof; concrete feature can not be used as the restriction to technical scheme of the present invention, and protection scope of the present invention should be as the criterion with appended claims of the present invention.
Claims (6)
1. black rhodium plating bath is characterized in that its component comprises:
Rhodium sulfate, its concentration are 1.5-5g/L;
Sulfuric acid, its volumetric concentration are 5-30ml/L;
Phenylsulfonic acid, its volumetric concentration are 5-30ml/L, and sulfuric acid and Phenylsulfonic acid total volume concentration are no more than 40ml/L;
Benzamide, its concentration be 0.1-2g/L and
Between tolyl aldehyde, its concentration is 0.1-2g/L.
2. black rhodium plating bath is characterized in that its component comprises:
Rhodium sulfate, its concentration are 1.5-5g/L;
Sulfuric acid, its volumetric concentration are 5-30ml/L;
Phenylsulfonic acid, its volumetric concentration are 5-30ml/L, and sulfuric acid and Phenylsulfonic acid total volume concentration are no more than 40ml/L;
Benzamide, its concentration be 0.1-2g/L and
O-methyl-benzene formyl chloride, its concentration are 0.1-2g/L.
3. black rhodium plating bath is characterized in that its component comprises:
Rhodium sulfate, its concentration are 1.5-5g/L;
Sulfuric acid, its volumetric concentration are 5-30ml/L;
Phenylsulfonic acid, its volumetric concentration are 5-30ml/L, and sulfuric acid and Phenylsulfonic acid total volume concentration are no more than 40ml/L;
Benzamide, its concentration are 0.1-2g/L;
Between tolyl aldehyde and o-methyl-benzene formyl chloride, and a tolyl aldehyde and o-methyl-benzene formyl chloride total concn are 0.1-2g/L.
4. the described black rhodium plating bath of one of a use such as claim 1 to 3 method of electroplating black rhodium layer is characterized in that, anode is selected from least a in platinum, platinized titanium, titanium, the rhodium; Electroplating temperature is controlled at 30-80 ℃; Electroplating current density is 5-18A/dm
2Electroplating time is 0.5-18 minute.
5. method as claimed in claim 4 is characterized in that, in the electroplating process, plating piece is charged goes into groove.
6. method as claimed in claim 5 is characterized in that, in the electroplating process, stirs described black rhodium plating bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102769689A CN101949043B (en) | 2010-09-08 | 2010-09-08 | Formulation for electroplating black rhodium layer and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102769689A CN101949043B (en) | 2010-09-08 | 2010-09-08 | Formulation for electroplating black rhodium layer and method thereof |
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| Publication Number | Publication Date |
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| CN101949043A true CN101949043A (en) | 2011-01-19 |
| CN101949043B CN101949043B (en) | 2011-11-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506685A (en) * | 2016-01-25 | 2016-04-20 | 东莞联桥电子有限公司 | Novel rhodanizing process for PCBs |
| CN107687008A (en) * | 2017-08-28 | 2018-02-13 | 立美珠宝服务（深圳）有限公司 | Electric Jinsui River and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1949131A (en) * | 1932-11-14 | 1934-02-27 | Thomas P Shields | Rhodium plating |
| CN1420948A (en) * | 1999-12-23 | 2003-05-28 | Omg电镀技术有限公司 | Bath for electrochemically depositing highly lustrous white rhodium coatings and whitening agent for same |
-
2010
- 2010-09-08 CN CN2010102769689A patent/CN101949043B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1949131A (en) * | 1932-11-14 | 1934-02-27 | Thomas P Shields | Rhodium plating |
| CN1420948A (en) * | 1999-12-23 | 2003-05-28 | Omg电镀技术有限公司 | Bath for electrochemically depositing highly lustrous white rhodium coatings and whitening agent for same |
Non-Patent Citations (2)
| Title |
|---|
| 《材料保护》 20040930 曹人平等 镀铑工艺研究 23-24 1-6 第37卷, 第9期 2 * |
| 《江苏工业学院学报》 20070630 沈介发等 装饰性镀铑液的研究 26-29 1-6 第19卷, 第2期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506685A (en) * | 2016-01-25 | 2016-04-20 | 东莞联桥电子有限公司 | Novel rhodanizing process for PCBs |
| CN107687008A (en) * | 2017-08-28 | 2018-02-13 | 立美珠宝服务（深圳）有限公司 | Electric Jinsui River and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101949043B (en) | 2011-11-02 |
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