CN101348622B - Novel agent preventing silver coating from coloring in cyanide silver plating process - Google Patents
Novel agent preventing silver coating from coloring in cyanide silver plating process Download PDFInfo
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- CN101348622B CN101348622B CN2007100439150A CN200710043915A CN101348622B CN 101348622 B CN101348622 B CN 101348622B CN 2007100439150 A CN2007100439150 A CN 2007100439150A CN 200710043915 A CN200710043915 A CN 200710043915A CN 101348622 B CN101348622 B CN 101348622B
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- silvered film
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Abstract
The invention relates to the silver discoloration prevention field, in particular to a novel silver coating discoloration preventing agent for the cyanide silver plating process. The content of components of the novel silver coating discoloration preventing agent for the cyanide silver plating process is 15 to 30 percent of Vaseline and 85 to 70 percent of KC-E103, wherein all percentages are weight percentages. With the technical solution, the problem that silver coatings are easy to discolor in the prior cyanide silver plating process is solved , and production cost is remarkably reduced.
Description
Technical field
The present invention relates to anti-silver-colored variable color field, relate in particular to a kind of new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology.
Background technology
Silver has favorable conductive, heat conduction and reflecting power, and weldability is better, is easy to polishing, and is good with basal body binding force.Silvered film has purposes widely in electromechanics trade, be mainly used in vapour send out with large-scale synchronous machine product on conducting element and contact member.Silvered film is variable color easily in air, and its variable color not only influences outward appearance, the more important thing is the element contact resistance is increased, and influences the conductivity of conducting element and contact member, in addition, also easily causes the difficulty of silver-plated welding.
The current technology of silvered film variable color that prevents both at home and abroad has:
1, adds the plating precious metal after silver-plated
Plate one deck precious metal again on the silvered film surface, can prevent the silver layer variable color effectively as gold, rhodium, palladium, platinum etc., but cost is too high, generally only be used for the minority military use product of high reliability, high stability.
2, light-plated silver lustre
The FB silver-plating brightener of Fudan University's development, as long as combination adds this brightening agent according to a certain percentage in cyanide silver plating solution, will obtain the silvering of full plate light, and the effect of its anti-variable color is very good, the FB brightening agent is two components, wherein FB-1 is the organic compound that a kind of normal carbon chain has a plurality of unsaturated link(age)s, and the FB-2 additive is the bigger surfactant R of a kind of molecular weight
1-R
2-SO
3Na, itself do not have the silver layer of making and produce the light effect, but can enlarge current density range, make the coating crystallization more careful, make its anti-tarnishing ability higher.But this method is used complicated.
3, chemical passivation
Carry out chromic acid after some unit cleans silver plated plating piece clear water and handle i.e. chemical passivation.Silvered film surface generates one deck chemical passivation film after chemical passivation, to isolate contacting of silvering surface and corrosive medium, prevents the variable color of silvering, but owing to this passive film is thinner, facts have proved that independent result of use is undesirable that anti-tarnishing ability is relatively poor.Through this chemical passivation operation, the thickness of silvering will reduce by 1～3m.Therefore,, need the part of chemical passivation, must add thickness coating for guaranteeing the thickness of silvering.
4, the organic anti-silver-colored colour-changing agent of dip-coating
Some producer organic anti-silver-colored colour-changing agent of dip-coating again after the silver plate passivation.Can make the silvering surface generate the skim solid film as BY-2, DJB-823, FB-4, TPS-Ag, LY-9025, SP-90S etc., improve the surface friction performance, have lubrication, contact resistance is stable, anti-tarnishing ability is good, especially is fit to patch devices such as switching element.But containing chromium in the passivating solution of silver plate passivation, is to the deleterious material of human body, uses enough safety, and owing to needs passivation also can damage the thickness of silvering.
Because it is more stable to electroplate the cyaniding plant of silver technology that adopts at present, do not considering to change under the existing technological specification situation, consider safety and the stability of producing, should avoid adopting the anti-blushing agent of containing chronium or flammable anti-blushing agent and this anti-blushing agent cost low.And known anti-silver-colored colour-changing agent can not satisfy above-mentioned whole requirement at present.
Summary of the invention
The object of the present invention is to provide a kind of low anti-silver-colored colour-changing agent of cost that can satisfy the stability of cyaniding plant of silver process safety and production.
Realize that the object of the invention technical scheme is: a kind of new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology, its component and content are:
Vaseline 15%～30%
KC-E103 85％～70％
All percentage ratios are weight percentage, and described KC-E103 is the electrified cleaning agent that Shanghai megalith company limited produces.
The above-mentioned new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology, described Vaseline can be medical ventolin.
A kind of new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology, its component and content are:
Medical ventolin 25%
KC-E103 75％
All percentage ratios are weight percentage.
Owing to adopted above-mentioned technical solution, solved the silver-plated allochroic problem of present employing cyaniding plant of silver technology, avoid adopting the anti-blushing agent or the flammable anti-blushing agent of containing chronium, and reduced production cost significantly.
Embodiment
The present invention is described in further detail below in conjunction with embodiment:
Embodiment 1
A kind of new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology, its component and content are:
Vaseline 15%～30%
KC-E103 85％～70％
All percentage ratios are weight percentage, and above-mentioned KC-E103 is the electrified cleaning agent that Shanghai megalith company limited produces.
Above-mentioned two kinds of components are at room temperature fully stirred evenly mixing to get final product.
Embodiment 2
A kind of new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology, its component and content are:
Medical ventolin 15%～30%
KC-E103 85％～70％
All percentage ratios are weight percentage, and above-mentioned KC-E103 is the electrified cleaning agent that Shanghai megalith company limited produces.Wherein the medical ventolin of medical ventolin for buying in general pharmacy all can buy as pharmacies such as the fair upward pharmacies of Shanghai thunder.
Above-mentioned two kinds of components are at room temperature fully stirred evenly mixing to get final product.
Embodiment 3
Preferably, the above-mentioned new anti-silvered film colour-changing agent SD-2 that is used for cyaniding plant of silver technology, its component and content are:
Medical ventolin 25%
KC-E103 75％
All percentage ratios are weight percentage.Above-mentioned KC-E103 is the electrified cleaning agent that Shanghai megalith company limited produces.
Above-mentioned two kinds of components are at room temperature fully stirred evenly mixing to get final product.
Using method:
Should earlier it fully be stirred evenly.Finding can flood wherein, and big part then is applied to the surface, the drying of giving free rein to then with the method for brushing or spray.
Further specify the effect of this anti-silvered film colour-changing agent below with test.
1, outside atmosphere exposure test
General silvered film grade separation is as follows:
First class: not variable color keeps former coating color and luster substantially;
Second class: local light discolouration, color are light yellow or pale pink;
Third class: local moderate variable color, color is yellowish brown;
The fourth level: local serious discoloration, color are tawny or puce;
Penta grade: all variable colors, color is pitch black grey or aterrimus.
To then, hang over and electroplate workshop section outdoor 3 months with the silver-plated copper joint use anti-blushing agent and the processing of above-mentioned SD-2 anti-blushing agent respectively of cyaniding plant of silver explained hereafter, carry out weather exposure test.
Test-results: the joint of handling with other anti-blushing agents has become the grey black look, and with the slightly flavescence of joint surface that above-mentioned SD-2 anti-blushing agent is handled, point-like black is only arranged.The silvered film grade still belongs to second class.Significantly better than other colour-changing agents.
Table 1 is that comparing result is observed in the anti-silver-colored variable color of above-mentioned test.
Table 1
2, the test of contact resistance
Motor component is silver-plated to be in order to improve electroconductibility, should not influence electroconductibility and handle through anti-variable color.Therefore must carry out the test of contact resistance.
Testing method is that two silver-plated copper joints with the cyaniding plant of silver explained hereafter are tightened with bolt, measures with microohm meter.Measured contact resistance value is as shown in table 2.
Table 2
| Technology category | Contact resistance (μ Ω) |
| Not silver-plated | 58 |
| Be untreated after silver-plated | 8 |
| SSILTAN-S | 8.2 |
| JS-Ag888 | 9.3 |
| LE-100 | 8.9 |
| LE-105 | 8.1 |
| RST | 8.7 |
| SD-1 | 9 |
| SD-2 | 8.6 |
| WD-40 | 8.8 |
As from the foregoing, after silver plate was handled through above-mentioned each anti-blushing agent, its contact resistance was more or less the same.And it is close with the silver plate contact resistance of preventing the variable color processing.Therefore, use these anti-blushing agents can not influence conductivity.
Therefore, can learn according to above test-results: anti-silvered film colour-changing agent of the present invention is suitable as the colour-changing agent with the silvered film of cyaniding plant of silver explained hereafter.Can prevent the silvered film variable color significantly.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique, under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (3)
1. new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology, its component and content are:
Vaseline 15%～30%
KC-E103 85％～70％
All percentage ratios are weight percentage, and described KC-E103 is the electrified cleaning agent that Shanghai megalith company limited produces.
2. the new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology according to claim 1 is characterized in that described Vaseline is medical ventolin.
3. the new anti-silvered film colour-changing agent that is used for cyaniding plant of silver technology according to claim 2, its component and content are:
Medical ventolin 25%
KC-E103 75％
All percentage ratios are weight percentage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100439150A CN101348622B (en) | 2007-07-17 | 2007-07-17 | Novel agent preventing silver coating from coloring in cyanide silver plating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100439150A CN101348622B (en) | 2007-07-17 | 2007-07-17 | Novel agent preventing silver coating from coloring in cyanide silver plating process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101348622A CN101348622A (en) | 2009-01-21 |
| CN101348622B true CN101348622B (en) | 2011-08-31 |
Family
ID=40267609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100439150A Expired - Fee Related CN101348622B (en) | 2007-07-17 | 2007-07-17 | Novel agent preventing silver coating from coloring in cyanide silver plating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101348622B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157592A (en) * | 2011-01-06 | 2011-08-17 | 上海晶澳太阳能科技有限公司 | Internal wire for solar module and processing technique thereof |
-
2007
- 2007-07-17 CN CN2007100439150A patent/CN101348622B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 熊炯辉.防止银、铜及其合金变色.表面技术 1986-02.1986,(1986-02),第41页左栏第10-24行. |
| 熊炯辉.防止银、铜及其合金变色.表面技术 1986-02.1986,(1986-02),第41页左栏第10-24行. * |
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| Publication number | Publication date |
|---|---|
| CN101348622A (en) | 2009-01-21 |
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