CN103938233A - Zinc-nickel alloy electroplating solution - Google Patents
Zinc-nickel alloy electroplating solution Download PDFInfo
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- CN103938233A CN103938233A CN201410094358.5A CN201410094358A CN103938233A CN 103938233 A CN103938233 A CN 103938233A CN 201410094358 A CN201410094358 A CN 201410094358A CN 103938233 A CN103938233 A CN 103938233A
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- plating solution
- nickel alloy
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- alloy plating
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Abstract
The invention discloses a zinc-nickel alloy electroplating solution. The zinc-nickel alloy electroplating solution comprises 2-20g/L of zinc oxide, 60-200g/L of sodium hydroxide, 5-40g/L of nickel sulfate, a complexing agent, a brightener and deionized water. When the solution is used, the current density is 2-4A/dm<2>, the solution is used at an anode, and the temperature is 10-30DEG C. The solution is characterized in that the solution also comprises triethanolamine, and the complexing agent is 50-70ml/L of sodium dodecyl benzene sulfonate; and the brightener is 4-6ml/L of an amine and epoxy compound condensate. The zinc-nickel alloy electroplating solution has the advantages of good stability and good coating performance.
Description
Technical field
The present invention relates to alloy material electroplate liquid, be specifically related to a kind of electroplated zinc nickel alloy plating solution.
Background technology
At present, conventional admiro plating solution mainly contains two types.Be a slightly acidic chloride plate liquid, adopt nickel salt and zinc salt as main salt, muriate is as conducting salt, and boric acid is as buffer reagent.The feature of this plating solution is cathode efficiency high (more than 95%), and sedimentation velocity is fast, and coating fragility is low, and sewage disposal ratio is easier to, and coating nickel content is many in 11%～15% scope, but the dispersive ability of plating solution and covering power are poor.Another kind is basic zincic acid salt plating liquor, and main salt generally adopts zincate and nickel salt, and feature is that dispersive ability and the covering power of plating solution is higher, coating is even, bright, current density range is wide, is suitable for the plating of complicated shape, and rack plating and barrel plating all can, plating solution is little to equipment corrosion, especially the internal surface of tubulose plating piece is not had to corrodibility, plating solution, not containing violent in toxicity, is easy to management, wastewater treatment is simple, but cathode efficiency lower (50%～80%).Alkaline system electroplated zinc nickel alloy plating solution is owing to having above feature, so be widely used in the mechanical component such as automobile to electroplate.
Existing a kind of electroplated zinc nickel alloy plating solution, belongs to basic zincic acid salt plating liquor, and its composition is as shown in table 1;
Table 1; The composition of existing a kind of electroplated zinc nickel alloy plating solution
| Sequence number | Title material | Molecular formula (or code name) | Specification | Content range | Remarks |
| 1 | Zinc oxide | ZnO | First grade | 2～20g/L | ? |
| 2 | Sodium hydroxide | NaOH | Technical grade | 60～200g/L | ? |
| 3 | Nickel salt solution | Ni 2SO 4 | Technical grade | 5～40g/L | ? |
| 4 | Complexing agent | EDTA | Technical grade | 30～100ml/L | ? |
| 5 | Brightening agent | Sodium dodecylbenzene sulfonate | Technical grade | 2～10 ml/L | ? |
| 6 | Water | H 2O | Deionized water | Surplus | ? |
| ? | Anode | Zine plate | ? | ? | ? |
| ? | Current density | ? | ? | 2～3A/dm 2 | ? |
| ? | Temperature | ? | ? | 10～30℃ | ? |
Facts have proved, above-mentioned electroplated zinc nickel alloy plating solution can increase cathodic polarization owing to not comprising, make the additive that coating crystallization is careful, improve solution dispersibility and covering power, thereby when the mechanical component of being made by 40Cr series alloy and associated alloys material are electroplated, exist following main not enough:
1, solution is unstable: owing to there is no additive, make the cathodic polarization of this plating solution poor.Meanwhile, because the content range of complexing agent is higher, anode dissolution is accelerated, destroyed the balance of plating solution zinc, nickel ion, thereby make the solution of this plating solution unstable, precipitate particle shape material usually, solution is more muddy, and the rete obtaining is more coarse.
2, dispersive ability is poor: apply this plating solution and electroplate part or the sample obtaining, at part and hanger contact position or dark recess, usually there is no rete.
3, coating performance is poor: the part, the surface that adopt this plating solution to electroplate to obtain be not bright, have harsh feeling and corrosion resistance lower (the salt-fog test time is generally at 500H).
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of stability and the good electroplated zinc nickel alloy plating solution of coating performance.
For solving the problems of the technologies described above, the present invention takes following technical scheme;
An electroplated zinc nickel alloy plating solution, comprises zinc oxide 2g/L～20g/L, sodium hydroxide 60 g/L～200g/L, single nickel salt 5 g/L～40g/L, complexing agent, brightening agent and deionized water, during use, and current density 2/dm
2～4A/dm
2, anode, 10～30 ℃ of temperature, is characterized in that: also comprise additive trolamine, described complexing agent is Sodium dodecylbenzene sulfonate 50 ml/L～70 ml/L; Described brightening agent is condenses 4 ml/L～6 ml/L of amine and epoxy compounds.
Preferentially, described trolamine is 8～15ml/L.
Preferentially, described zinc oxide is 6 g/L～14g/L.
Preferentially, described sodium hydroxide is 100 g/L～140g/L.
Preferentially, described nickel salt solution is 20 ml/L～30 ml/L.
Preferentially, Sodium dodecylbenzene sulfonate is 60 ml/L.
Preferentially, the condenses of described amine and epoxy compounds is 5ml/L.
Preferentially, described temperature is 20 ℃.
Preferentially, described anode is zine plate or nickel plate.
Compared with prior art, the present invention comprises following beneficial effect:
By adding trolamine additive, although the instability constant (1.0 * 10 of trolamine and zinc complexing
-2) larger, but the instability constant (8.15 * 10 of itself and nickel complexing
-4) less, and can form more stable complexing ion with zine ion and nickel ion, thereby can improve cathodic polarization and then performance more stable, that make coating is strengthened, improve coating light plating, make crystallization more careful, thereby also improve the corrosion resistance of coating.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail;
Electroplated zinc nickel alloy plating solution of the present invention, comprises zinc oxide 2g/L～20g/L, sodium hydroxide 60 g/L～200g/L, single nickel salt 5 g/L～40g/L, complexing agent, brightening agent and deionized water, during use, and current density 2/dm
2～4A/dm
2, anode, 10～30 ℃ of temperature.Electroplated zinc nickel alloy plating solution of the present invention also comprises additive trolamine, and described complexing agent is Sodium dodecylbenzene sulfonate 50 ml/L～70 ml/L, and described brightening agent is condenses 4 ml/L～6 ml/L of amine and epoxy compounds.The present invention is by adding additive trolamine, and to make complexing agent be that Sodium dodecylbenzene sulfonate is controlled within the scope of 50 suitable ml/L～70 ml/L, brightening agent is that the condenses of amine and epoxy compounds is also controlled within the scope of 4 suitable ml/L～6 ml/L, thereby can improve cathodic polarization, and more stable, safeguard easily.The light plating that can improve coating simultaneously, makes the crystallization of coating more careful, and corrosion resistance is better.
Described trolamine is 8～15ml/L.Evidence, this makes the present invention can make better the performance of coating be strengthened, and makes solution more stable, be conducive to the maintenance of plating solution, also make the performance of coating be strengthened as the luminance brightness raising of coating, crystallization is more careful, thereby improves the corrosion resistance of coating.
Described zinc oxide is 6 g/L～14g/L.Evidence, zinc oxide is within the scope of 6 g/L～14g/L, plating solution of the present invention is more stable, and the variation minimizing of coating nickel, the consistence of coating are strengthened.If described zinc oxide is 10g/L, plating solution of the present invention is more stable.
Described sodium hydroxide is 100 g/L～140g/L.Evidence, this makes the content of conducting salt more appropriate, can improve the electric conductivity of plating solution of the present invention, reduces the groove of plating tank and presses, and improves dispersive ability and the covering power of plating solution of the present invention, thereby improves the quality of coating.If described sodium hydroxide is 120g/L, more can improve the electric conductivity of plating solution of the present invention, further reduce the groove of plating tank and press, improve better dispersive ability and the covering power of plating solution plating solution of the present invention, thereby more effectively improve the quality of coating.
Described nickel salt solution is 20 ml/L～30 ml/L.Evidence, the content range of such nickel salt solution more effectively and reasonably, can make solution of the present invention comparatively stable, and the variation minimizing of coating content nickel, consistence are strengthened.
Described Sodium dodecylbenzene sulfonate is 60 ml/L.Like this, can make plating solution of the present invention more stable.
The condenses of described amine and epoxy compounds is 5ml/L.Like this, can improve better dispersive ability and the covering power of plating solution of the present invention, increase the light plating of coating.
Described temperature is 20 ℃.Such temperature can make the speed of response of plating solution of the present invention accelerate, and in coating, nickel content also increases, and improves the erosion resistance of coating etc.
Described anode is zine plate.Zine plate can dissolve in electrochemical reaction, can supplement the zine ion consuming in plating solution, thereby guarantees the concentration balance of zine ion in solution, is conducive to guarantee the stability of solution.
Claims (9)
1. an electroplated zinc nickel alloy plating solution, comprises zinc oxide 2g/L～20g/L, sodium hydroxide 60 g/L～200g/L, single nickel salt 5 g/L～40g/L, complexing agent, brightening agent and deionized water, during use, and current density 2/dm
2～4A/dm
2, anode, 10～30 ℃ of temperature, is characterized in that: also comprise additive trolamine, described complexing agent is Sodium dodecylbenzene sulfonate 50 ml/L～70 ml/L; Described brightening agent is condenses 4 ml/L～6 ml/L of amine and epoxy compounds.
2. electroplated zinc nickel alloy plating solution according to claim 1, is characterized in that: described trolamine is 8～15ml/L.
3. electroplated zinc nickel alloy plating solution according to claim 1, is characterized in that: described zinc oxide is 6 g/L～14g/L.
4. electroplated zinc nickel alloy plating solution according to claim 1, is characterized in that: described sodium hydroxide is 100 g/L～140g/L.
5. electroplated zinc nickel alloy plating solution according to claim 1, is characterized in that: described nickel salt solution is 20 ml/L～30 ml/L.
6. electroplated zinc nickel alloy plating solution according to claim 1, is characterized in that: described Sodium dodecylbenzene sulfonate is 60 ml/L.
7. electroplated zinc nickel alloy plating solution according to claim 1, is characterized in that: the condenses of described amine and epoxy compounds is 5ml/L.
8. electroplated zinc nickel alloy plating solution according to claim 1, is characterized in that: described temperature is 20 ℃.
9. electroplated zinc nickel alloy plating solution according to claim 1, is characterized in that: described anode is zine plate.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239115A (en) * | 2015-10-22 | 2016-01-13 | 广州超邦化工有限公司 | Alkaline zinc-nickel alloy electroplating solution with high stability |
| CN108220870A (en) * | 2018-01-23 | 2018-06-29 | 滁州英诺信电器有限公司 | A kind of handware surfacecti proteon treatment process |
| CN109252194A (en) * | 2018-11-21 | 2019-01-22 | 上海聆轩化工商行 | A kind of Zinc-nickel alloy electroplating liquid and its preparation process |
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| US4877496A (en) * | 1986-08-22 | 1989-10-31 | Nippon Hyomen Kagaku Kabushiki Kaisha | Zinc-nickel alloy plating solution |
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| CN1039546C (en) * | 1994-01-24 | 1998-08-19 | 厦门大学 | Basic plating method for bright Zn-Ni alloy |
| CN1477236A (en) * | 2003-07-10 | 2004-02-25 | 上海交通大学 | Additive component of alkaline solution for electroplating zinc-nickel alloy and brass and its preparation method |
| CN101240437A (en) * | 2008-03-20 | 2008-08-13 | 北京航空航天大学 | Method for plating zinc-nickel alloy in alkaline electroplate liquid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239115A (en) * | 2015-10-22 | 2016-01-13 | 广州超邦化工有限公司 | Alkaline zinc-nickel alloy electroplating solution with high stability |
| CN108220870A (en) * | 2018-01-23 | 2018-06-29 | 滁州英诺信电器有限公司 | A kind of handware surfacecti proteon treatment process |
| CN109252194A (en) * | 2018-11-21 | 2019-01-22 | 上海聆轩化工商行 | A kind of Zinc-nickel alloy electroplating liquid and its preparation process |
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