CN1162570C - A kind of cyanide silver plating brightener and preparation method thereof - Google Patents
A kind of cyanide silver plating brightener and preparation method thereof Download PDFInfo
- Publication number
- CN1162570C CN1162570C CNB021156441A CN02115644A CN1162570C CN 1162570 C CN1162570 C CN 1162570C CN B021156441 A CNB021156441 A CN B021156441A CN 02115644 A CN02115644 A CN 02115644A CN 1162570 C CN1162570 C CN 1162570C
- Authority
- CN
- China
- Prior art keywords
- brightening agent
- water
- silver plating
- distilled water
- sodium tartrate
- 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.)
- Expired - Fee Related
Links
- 238000007747 plating Methods 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- LFAGQMCIGQNPJG-UHFFFAOYSA-N silver cyanide Chemical compound [Ag+].N#[C-] LFAGQMCIGQNPJG-UHFFFAOYSA-N 0.000 title claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000012153 distilled water Substances 0.000 claims abstract description 14
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 claims abstract description 14
- 235000011006 sodium potassium tartrate Nutrition 0.000 claims abstract description 14
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims abstract 12
- 229940074439 potassium sodium tartrate Drugs 0.000 claims abstract 6
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005282 brightening Methods 0.000 abstract description 29
- 239000003795 chemical substances by application Substances 0.000 abstract description 29
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 24
- 229910052709 silver Inorganic materials 0.000 abstract description 23
- 239000004332 silver Substances 0.000 abstract description 23
- 238000007796 conventional method Methods 0.000 abstract description 2
- 238000009713 electroplating Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000002845 discoloration Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 11
- 239000007864 aqueous solution Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 150000002460 imidazoles Chemical class 0.000 description 7
- 239000000243 solution Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- VQLYBLABXAHUDN-UHFFFAOYSA-N bis(4-fluorophenyl)-methyl-(1,2,4-triazol-1-ylmethyl)silane;methyl n-(1h-benzimidazol-2-yl)carbamate Chemical compound C1=CC=C2NC(NC(=O)OC)=NC2=C1.C=1C=C(F)C=CC=1[Si](C=1C=CC(F)=CC=1)(C)CN1C=NC=N1 VQLYBLABXAHUDN-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- HELHAJAZNSDZJO-UHFFFAOYSA-L sodium tartrate Chemical compound [Na+].[Na+].[O-]C(=O)C(O)C(O)C([O-])=O HELHAJAZNSDZJO-UHFFFAOYSA-L 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010946 fine silver Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- -1 small molecules sulfide Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Electroplating And Plating Baths Therefor (AREA)
Abstract
The present invention relates to a cyaniding silver plating brightening agent which is composed of the components of 100 to250 g/L of potassium sodium tartrate and 10 to 20 g/ L imidazole, wherein water or distilled water is used as solvents. The present invention also provides a preparation method of the brightening agent. The potassium sodium tartrate is dissolved into water or distilled water at 50 to 60DEG C; the imidazole is dissolved into water or distilled water and then is added to the prepared potassium sodium tartrate water solution, the solution is diluted to 1 liter, and the brightening agent is prepared by uniformly mixing. The brightening agent provided by the present invention is added to silver plating liquid, electroplating is carried out according to a conventional method, and bright silver plating which has the advantages of uniform color, low possibility of discoloration, higher hardness, better abrasion resistance and strong bonding force with basal bodies is obtained. Compared with an ordinary cyaniding silver plating brightening agent, the brightening agent has the advantages of high working temperature (5 to 40 DEG C), wider current density range, good throwing power, etc. on the operational technology.
Description
Technical field
The present invention relates to a kind of brightening agent for cyaniding plant of silver.
Background technology
Along with people's living standard improves the development of advancing by leaps and bounds with electronics and information industry day by day, people also grow with each passing day to the demand of bright silver, so electrosilvering has a wide range of applications in electron trade and ornamental industry.The system of electrosilvering practical application at present can be divided into cyaniding plant of silver and the big class of non-cyanide plating money.Along with improving constantly of people's environmental consciousness, non-cyanide silver coating should be the development in future direction.But compare with cyaniding plant of silver, the non-cyanide silver coating operating procedure is complicated, and cost is higher, and especially the stability of plating bath in the non-cyanide silver coating system and brightening agent thereof fails to be well solved always, be difficult to long-time continuous operation, so at present silver-platedly still occupy an leading position with the cyaniding system.Traditional silver lustre preparation method plates a bed thickness silver in basic plating bath, and then polishes with mechanical grinding polishing or chemical process; This is the wasting manpower and material resources not only, also wastes a large amount of silver in polishing process, and bright silver then can plate out the silver lustre of specular gloss once.The effect of bright silver depends on the selection of brightening agent, and therefore, the research of cyaniding system brightening agent has very direct realistic meaning.Present commercial brightening agent for cyaniding plant of silver overwhelming majority sulfur-bearing decomposes in electrodeposition process easily, and the small molecules sulfide of generation can be mixed in the coating, easily makes coating color, and the working current density scope is narrower.
Summary of the invention
The present invention provides a kind of brightening agent for cyaniding plant of silver at the problems referred to above exactly, and this brightening agent is used for cyaniding plant of silver can be improved solution dispersibility and widen working current density, improve the coating luminance brightness, and gained coating is not easy to change.
Technical scheme provided by the invention is: a kind of brightening agent for cyaniding plant of silver, and it consists of: 100-250 grams per liter Seignette salt, 10-20 grams per liter imidazoles, wherein solvent is water or distilled water.
The preparation method of above-mentioned brightening agent restrains 100-250 in the water or distilled water that Seignette salt is dissolved in 50-60 ℃ of 500-700 milliliter; In addition 10-20 is restrained imidazoles and be dissolved in 100-200 ml water or the distilled water, join then in the soluble tartrate sodium water solution of aforementioned preparation,, mix and promptly get required brightening agent with water or distilled water diluting to a liter.
The present invention adopts the brightening agent of above-mentioned not sulfur-bearing, has overcome the sulfur-bearing brightening agent and has easily made the shortcoming of coating color, and can work to increase light in the cyaniding plant of silver electrodeposition process, improve solution dispersibility and widen working current density.The present invention has certain improvement effect to other performance of plating bath in addition.
Embodiment
Embodiment one: brightening agent consist of the Seignette salt 100 grams per liter aqueous solution, the imidazoles 20 grams per liter aqueous solution.
Embodiment two: brightening agent consist of the Seignette salt 200 grams per liter aqueous solution, the imidazoles 10 grams per liter aqueous solution.
Embodiment three: brightening agent consist of the Seignette salt 250 grams per liter aqueous solution, the imidazoles 15 grams per liter aqueous solution.
Embodiment four: brightening agent consist of the Seignette salt 150 grams per liter aqueous solution, the imidazoles 13 grams per liter aqueous solution.
The preparation method of the brightening agent of embodiment one～four: (1) puts into the water or the distilled water of 500-700 milliliter in a clean container, be heated to 50-60 ℃; (2) Seignette salt is dissolved in the aforementioned water, is stirred to dissolving fully; (3) in another container, put into 100-200 ml water or distilled water, and imidazoles is dissolved in wherein, join in the soluble tartrate sodium water solution of aforementioned preparation after being stirred to fully dissolving, with water or distilled water diluting to a liter, mix and promptly get required brightening agent.
Will be provided by the invention brightening agent add in the cyaniding plant of silver plating bath and electroplate according to a conventional method, can obtain that color and luster is even and not easy to change, hardness is higher, wear resistance is better, and the strong bright silver plating layer of basal body binding force.And this brightening agent is compared advantages such as have the working temperature height on operating procedure (5-40 ℃), current density range broad, covering power be good with general brightening agent for cyaniding plant of silver.
The best electroplating technical conditions that the present invention recommends to use is:
Silver Nitrate (AgNO
3) 35～45g/L
Potassium cyanide (KCN) 110～140g/L
Salt of wormwood (K
2CO
3) 8～10g/L
Seignette salt 18～20g/L
Brightening agent 8～12mL/L
15～35 ℃ of temperature
D
k(cathode current density) 0.5～3.0A/dm
2
S
Sun: S
Cloudy＞2: 1
Stirring negative electrode moves or pneumatic blending
Anode: 99.99% fine silver plate or stainless steel plate
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021156441A CN1162570C (en) | 2002-03-28 | 2002-03-28 | A kind of cyanide silver plating brightener and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021156441A CN1162570C (en) | 2002-03-28 | 2002-03-28 | A kind of cyanide silver plating brightener and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1386913A CN1386913A (en) | 2002-12-25 |
| CN1162570C true CN1162570C (en) | 2004-08-18 |
Family
ID=4743777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021156441A Expired - Fee Related CN1162570C (en) | 2002-03-28 | 2002-03-28 | A kind of cyanide silver plating brightener and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162570C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372795C (en) * | 2005-05-30 | 2008-03-05 | 秦皇岛玻璃工业研究设计院 | Reduction preparation for silver mirror |
-
2002
- 2002-03-28 CN CNB021156441A patent/CN1162570C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1386913A (en) | 2002-12-25 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |