CN1900379A - Supersonic auxiliary gold simulating electroplating process - Google Patents
Supersonic auxiliary gold simulating electroplating process Download PDFInfo
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- CN1900379A CN1900379A CN 200610101074 CN200610101074A CN1900379A CN 1900379 A CN1900379 A CN 1900379A CN 200610101074 CN200610101074 CN 200610101074 CN 200610101074 A CN200610101074 A CN 200610101074A CN 1900379 A CN1900379 A CN 1900379A
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- imitation gold
- plating
- imitation
- water washing
- ultrasonic wave
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Abstract
The present invention discloses ultrasonic auxiliary imitation gold electroplating technology. It contains pre - plating basal body, preprocessing before chemical plating, electroless nickel plating, water washing after electroless nickel plating, imitation gold electroplating, water washing after imitation gold electroplating, water washing after passivation, and drying; featuring that leading-in ultrasonic for water washing; imitation gold plating solution pH being 8.5-9.5; imitation gold electroplating current density being 5.0-7.0A/dm 2; imitation gold electroplating temperature being 30-35 degree centigrade; imitation gold electroplating time being 35-55 second. Said invention eliminates void volume and greatly raises imitation gold electroplated coating thickeness and compactness, improves technological conditions, has high binding force between base material and cladding material.
Description
Technical field
The present invention relates to ultrasonic wave assistant chemical nickel plating technology, particularly supersonic auxiliary gold simulating electroplating process belongs to the electroless plating electroplating technology field of holding concurrently.
Background technology
Ultrasonic wave electrochemistry is that ultrasonic radiation is combined with electrochemical method, is one of forward position research field of sonochemistry and electrochemistry subject crossing.The existing report of the application facet of ultrasonic wave in electroless plating,, do not appear in the newspapers as yet to sonochemistry nickel plating technical study, diamond surface electroless copper-nickel double-layer alloy etc. on Study of Electroless Nickel Plating, the plastics as ultrasonic wave under the low temperature but be applied to imitation gold plating.
Summary of the invention
It is low to the objective of the invention is to electroplate speed at traditional imitative gold plating, and the deficiency that quality of coating is not high is introduced ultrasonic wave in the imitation gold plating, has increased working current far away, has accelerated sedimentation velocity, improves the quality of electrolytic coating.
The present invention is achieved in that technology comprises preplating matrix, the preceding pre-treatment of electroless plating, chemical nickel plating, chemical nickel plating after washing, imitation gold plating, imitation gold plating after washing, passivation, passivation after washing, drying.Its characteristics are that chemical nickel plating, imitation gold plating, passivation after washing process introduced ultrasonic wave; Imitative gold plating electroplate liquid pH is 8.5-9.5; The imitation gold plating current density is 5.0-7.0A/dm
2The imitation gold plating temperature is 30-35 ℃; The imitation gold plating time is 35-55 second.Fig. 1 is seen in technical process.
It is all influential to the imitation gold deposit outward appearance that experiment draws ultrasonic wave effect, temperature, pH value, electroplating time, sees Table 1a, table 1b, table 2a, table 2b, table 3, table 4; The ultrasonic wave effect sees Table 5 to the deposit thickness of coating is influential, and visible the working current density that is adopted is also different under different working conditions, and the deposit thickness that obtains is also different.
Along with hyperacoustic adding, obvious variation has taken place in aspects such as the color of coating, outward appearance, quality.Through detailed research, think that the reason that this situation occurs is mainly owing to hyperacoustic strong unpolarizing.It is exactly in fact the strong unpolarizing that hyperacoustic mechanical vibration and cavitation phenomenon cause the special stirring of diffusion layer in electroplating solution.This effect can significantly reduce concentration polarization, thereby allows to use high current density to improve the sedimentation effect of coating, can obtain fine and close smooth good coating simultaneously.
Cathode current density is to the influence of imitation gold deposit outward appearance under the effect of table 1a. ultrasonic wave
| Dk 1Current density | Experimental phenomena |
| 1.0 | Whiting |
| 2.0 | Khaki color |
| 3.0 | Bronze |
| 4.0 | The bronze color adds the part golden yellow |
| 4.5 | Shallow platinum yellow |
| 5.0 | Golden yellow |
| 6.0 | Golden yellow |
| 7.0 | Golden yellow |
| 8.0 | The edge begins to tarnish, and part is burnt |
Table 1b. does not have ultrasonic wave and does the influence of time spent cathode current density to the imitation gold deposit outward appearance
| DK 2Current density | Experimental phenomena |
| 0.7 | Yellow is more shallow, slightly whiting |
| 0.9 | Yellow brightness is very shallow |
| 1.2 | Yellow brightness |
| 1.5 | Golden yellow brightness is very shallow |
| 1.8 | Coating begins the deepening of getting confused |
| 2.0 | Glassy yellow, the edge blackout, there is the gas etching vestige on the surface |
The pH value is to the influence of imitation gold deposit outward appearance under the effect of table 2a. ultrasonic wave
| The pH value | Experimental phenomena |
| 7.0 | Jaundice, golden yellow is more shallow, and is red partially |
| 8.0 | Golden yellow, luminance brightness is better |
| 8.5 | Golden yellow, luminance brightness is good |
| 9.0 | Golden yellow, luminance brightness is good |
| 9.5 | Golden yellow, luminance brightness is good |
| 10.0 | Golden yellow, luminance brightness is general, the local mist of sending out |
Table 2b. does not have ultrasonic wave and does the influence of time spent pH value to the imitation gold deposit outward appearance
| The H value | Experimental phenomena |
| 8.0 | Red partially, the plating bath muddiness |
| 8.2 | Jaundice, golden yellow is more shallow, and is red partially |
| 8.4 | Golden yellow, color are relatively dimer |
| 8.6 | There is certain golden yellow the part |
| 9.0 | Begin obfuscation.The local mist of sending out |
| 9.5 | The edge begins to burn |
Table 3 temperature is to the influence of imitation gold deposit outward appearance
| Temperature ℃ | Experimental phenomena |
| 22 | Turn white |
| 25 | Light yellow |
| 28 | Light golden rod yellow |
| 30 | Golden yellow, the good brightness color and luster is even |
| 35 | Golden yellow, the good brightness color and luster is even |
| 38 | Yellow, good brightness, burn the edge section |
Table 4. electroplating time is to the influence of imitation gold deposit color and luster
| Electroplating time (sec) | Experimental phenomena |
| 25 | White partially |
| 30 | Brassy |
| 35 | Golden yellow, luminance brightness is good |
| 45 | Golden yellow, luminance brightness is good |
| 55 | Golden yellow, luminance brightness is good |
| 65 | Mist is sent out at the edge |
| 75 | The edge burns |
The contrast of the coating of table 5. ultrasonic wave effect and the different deposit thickness of common coating
| Working current density a (A/dm 2) | 1.0 | 2.0 | 30 | 4.0 | 5.0 | 6.0 | 7.0 |
| Working current density b (A/dm 2) | 0.7 | 0.9 | 1.1 | 1.3 | 1.5 | 1.8 | 2.0 |
| Deposit thickness a (μ m/min) | 0.87 | 1.62 | 1.93 | 2.17 | 2.41 | 2.87 | 3.42 |
| Deposit thickness b (μ m/min) | 0.76 | 0.89 | 1.20 | 1.43 | 1.57 | 1.57 | 1.57 |
The effect of a-ultrasonic wave, b-does not have the ultrasonic wave effect
Carry out scanning electron microscope analysis to applying when not applying ultrasonic wave the surface of resulting imitation gold deposit, the result is as follows: Fig. 1 is non-ultrasonic wave effect coating electron-microscope scanning figure, and Fig. 2 is ultrasonic wave effect coating electron-microscope scanning figure.By Fig. 1, Fig. 2 as seen, do not form countless bubble cavities, obviously eliminated this bubble cavity through the coating of ultrasonic wave effect through ultrasonic wave effect coating.As seen ultrasonic wave is to changing the quality of coating, and the compactness that increases coating has stronger effect.
Technology cost of the present invention is lower, service temperature is not high, introduces after the ultrasonic wave, makes to electroplate under the current density that adopts and the no hyperacoustic situation to compare raising more than 7 times, accelerate sedimentation velocity, eliminated the voidage of coating, increased the compactness and the thickness of coating, the bonding force height between base material and coating, the corrosion resistance of coating height, the plating piece surfacing is attractive in appearance, and the electroplating technology compliance with environmental protection requirements has good application prospects.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is non-ultrasonic wave effect coating electron-microscope scanning figure.
Fig. 3 is ultrasonic wave effect coating electron-microscope scanning figure of the present invention.
Embodiment
Embodiment 1
The steel disc that adopts 7cm * 3cm * 0.1cm is as matrix, and with the husky rusty stain of removing the surface, the polishing light is smooth.Washing is clean, with 40g/L NaOH ultrasonic alkaline oil removing 5 minutes, the ultrasonic washing of distilled water 5 minutes, uses 3% the ultrasonic pickling of HCl again 3 minutes, and distilled water is cleaned.Put into the plating bath that has prepared then, temperature is controlled at 50 ℃, supersonic chemical plating nickel 1 hour.The preparation of plating bath, it is as follows to fill a prescription:
NiSO
46H
2O 48g, Trisodium Citrate 48g, sodium hypophosphite 25g, buffer reagent: 40g, stablizer: 1mg, brightening agent: 0.5g/L.
1. take by weighing the NiSO of metering
46H
2O, Trisodium Citrate, sodium hypophosphite, buffer reagent, stablizer, brightening agent are dissolved in respectively in an amount of water.
2. with NiSO
46H
2O solution is poured in the Trisodium Citrate and is mixed, and adds sodium hypophosphite solution and other reagent then.
3. with distilled water diluting to a liter, regulating the pH value with ammoniacal liquor during use is 8.
Then the nickel plating steel disc is cleaned with distilled water.Put into imitation gold plating liquid and electroplated 40 seconds as negative electrode, current density is 6.0A/dm
2, temperature is 30 ℃.The pH value is controlled to be 9, the imitation gold plating liquid formula:
CuSO
45H
2O:50g/L; ZnSO
42H
2O:15g/L; SnCl
22H
2O:5g/L; Potassium pyrophosphate: 300g/L; KNaC
4H
4O:30g/L; K
3C
6H
5O
7: 30g/L; Nitrilotriacetic acid(NTA): 30g/L; Na
2CO
3: 20g/L; HIP-510 acid copper additives: 0.8g/L
Plating finishes clean with distilled water flushing.
Adopt 35g/L K
2Cr
2O
7Solution, under 50 ℃ condition, regulating the pH value with Glacial acetic acid is 3.5, passivation 15 minutes is then with clean with the ultrasonic washing of distilled water.At room temperature, use cold air drying.
Embodiment 2
Adopting the ABS plastic of 6cm * 3cm * 0.2cm is that acrylonitrile-butadiene-styrene copolymer is as matrix, with containing 30g/L NaOH, 30g/L Na
3PO
4, 30g/LNaCO
3Solution ultrasonic alkaline oil removing 5 minutes, CrO is used in the ultrasonic washing of distilled water 5 minutes again
3(400g/L) and H
2SO
4(400mL/L) roughening solution of two kinds of strong acid strong oxidizing properties produces the chemical milling effect to ABS plastic surface molecular structure, makes frosting form countless groove micropores, and distilled water is cleaned.Adopt 15g/L SnCl
2The sensitized solution that adds 20mL/L HCl in room temperature, is positioned over the ABS plastic of alligatoring in the sensitized solution and soaked 4 minutes, takes out after washing to neutral.Adopt 0.4g/L PdCl
2Add 5mL/L HCl activation solution, in room temperature, the plastics ABS of sensitization is positioned in the activated solution soaked 3 minutes, it is clean to take out after washing.Put into the plating bath that has prepared then, temperature is controlled at 50 ℃, supersonic chemical plating nickel 1 hour.The preparation of plating bath: prescription is with embodiment 1.Imitation gold plating prescription and technology are with embodiment 1.
Claims (1)
1, a kind of supersonic auxiliary gold simulating electroplating process, comprise preplating matrix, the preceding pre-treatment of electroless plating, chemical nickel plating, chemical nickel plating after washing, imitation gold plating, imitation gold plating after washing, passivation, passivation after washing, drying, it is characterized in that chemical nickel plating, imitation gold plating, passivation after washing process introducing ultrasonic wave; Imitative gold plating electroplate liquid pH is 8.5-9.5; The imitation gold plating current density is 5.0-7.0A/dm
2The imitation gold plating temperature is 30-35 ℃; The imitation gold plating time is 35-55 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610101074 CN1900379A (en) | 2006-07-08 | 2006-07-08 | Supersonic auxiliary gold simulating electroplating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610101074 CN1900379A (en) | 2006-07-08 | 2006-07-08 | Supersonic auxiliary gold simulating electroplating process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1900379A true CN1900379A (en) | 2007-01-24 |
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ID=37656357
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610101074 Pending CN1900379A (en) | 2006-07-08 | 2006-07-08 | Supersonic auxiliary gold simulating electroplating process |
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|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110154608A (en) * | 2019-05-31 | 2019-08-23 | 深圳市富立五金工艺品有限公司 | A kind of gold stamping silk-screen of handicraft surface and imitative golden product surface electroplating technology |
-
2006
- 2006-07-08 CN CN 200610101074 patent/CN1900379A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110154608A (en) * | 2019-05-31 | 2019-08-23 | 深圳市富立五金工艺品有限公司 | A kind of gold stamping silk-screen of handicraft surface and imitative golden product surface electroplating technology |
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