CN104878388B - It is a kind of to be used to strip decoating liquid of layers of copper surface nickel dam and preparation method thereof and strip method - Google Patents
It is a kind of to be used to strip decoating liquid of layers of copper surface nickel dam and preparation method thereof and strip method Download PDFInfo
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- CN104878388B CN104878388B CN201410071837.5A CN201410071837A CN104878388B CN 104878388 B CN104878388 B CN 104878388B CN 201410071837 A CN201410071837 A CN 201410071837A CN 104878388 B CN104878388 B CN 104878388B
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Abstract
The invention provides a kind of decoating liquid for being used to strip layers of copper surface nickel dam and preparation method thereof and strip method.The decoating liquid includes the first corrosion inhibiter and oxidant；First corrosion inhibiter is 2 NMFs.It can be ensured to prevent layers of copper from being corroded while strip nickel dam with the decoating liquid of the present invention.
Description
Technical field
The invention belongs to field of electroplating, more particularly to a kind of decoating liquid and its preparation side for being used to strip layers of copper surface nickel dam
Method and strip method.
Background technology
The nickel coating in layers of copper is generally required in modern electroplating technology and plays anti-corrosion, antirust, and the mistake of the other metals of plating
Spend the effect such as coating.But sometimes, due in layers of copper Ni-Speed nickel coating easily there are quality problems, it is necessary to strip again again
Nickel plating, but common strip agent will also tend to layers of copper to return, and cause product rejection.It is main that nickel technique is moved back in existing layers of copper
There is electrolysis, but electrolysis is more troublesome, and particularly plastics part strip also needs special hanger, and some workpiece conduction is bad to be caused
Can not strip.And chemical strip method often adds m-nitrobenzene sodium sulfonate with potassium rhodanide, but one layer of difficulty is had on layers of copper surface
With the film washed off, quality of coating and adhesion are influenceed.And high temperature, volatility irritant gas is more, larger to human injury.This
Not only temperature is relatively low for invention, and volatility is few, environmental protection.Layers of copper quality and adhesion are not interfered with simultaneously.
Publication No. CN101775601A Chinese patent discloses a kind of suitable for brass surfaces tin-nickel coating of decorporating
Chemical decoating liquid, described decoating liquid is the aqueous solution, wherein the content of each raw material components is：Oxidant 200-300ml/L, accelerate
Agent 60-100 ml/L, complexing agent 15-40g/L, corrosion inhibiter 0.1-0.4 g/L；Described oxidant selects 65-68% nitric acid；Institute
The accelerator stated selects 36-38% hydrochloric acid；Described complexing agent selects citric acid；Described corrosion inhibiter selects BTA.Should
The tin-nickel coating of brass surfaces although patent can decorporate, the patent are easy to erode to layer of brass, cause excessive corrosion.
Chemical layers of copper, due to being pure copper layer, is easier by above-mentioned strip corrosion compared to for layer of brass than brass.Layer of brass due to
It is alloy-layer, so resistance to corrosion is eager to excel a lot, so above-mentioned patent can not be used in chemical plating copper layer.
The content of the invention
There is the technical problem of corrosion layers of copper for the decoating liquid of nickel dam in the existing stripping layers of copper of solution in the present invention, there is provided one
Kind will not corrode decoating liquid of layers of copper and preparation method thereof and strip method.
The invention provides a kind of decoating liquid, the decoating liquid includes the first corrosion inhibiter and oxidant；First inhibition
Agent is 2- NMFs.
It is present invention also offers the preparation method of decoating liquid described above, oxidant, the first corrosion inhibiter is soluble in water
It is decoating liquid to form mixed liquor.
Present invention also offers a kind of strip method, methods described includes for surface being coated with layers of copper, the base material of nickel dam successively
It is immersed in decoating liquid and carries out strip, returns the nickel dam on layers of copper surface；Wherein, the decoating liquid is strip of the present invention
Liquid.
Contain 2- NMFs in the decoating liquid of the present invention, 2- NMFs can be formed on layers of copper surface and protected
Film, reduce corrosion rate of the decoating liquid to layers of copper.So as to prevent the corrosion in strip to layers of copper..
Embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only explaining
The present invention, it is not intended to limit the present invention.
The invention provides a kind of decoating liquid, the decoating liquid includes the first corrosion inhibiter and oxidant；First inhibition
Agent is 2- NMFs.
According to decoating liquid provided by the present invention, it is preferable that the decoating liquid also includes the second corrosion inhibiter, and described second is slow
Erosion agent is at least one of ethylenediamine, triethanolamine, BTA.Second corrosion inhibiter has certain corrosion inhibition in itself,
But the effect of the first corrosion inhibiter can not be reached by being used alone, and the effect of the raising effect of auxiliary be only served, with the first corrosion inhibiter
Mating reaction, layers of copper is protected while not influenceing and etching nickel dam.According to decoating liquid provided by the present invention, it is preferable that described
The mass ratio of first corrosion inhibiter and second corrosion inhibiter is 1：1-20, more preferably 1：5-15.First corrosion inhibiter quality
Than that can reduce nickel dam corrosion rate if too high, mass ratio is too low, and to increase corrosion layers of copper dangerous.
According to decoating liquid provided by the present invention, it is preferable that second corrosion inhibiter is ethylenediamine, triethanolamine and benzo
The mixture of triazole.These three materials synergy can ensure that layers of copper is not corroded substantially, while the corrosion shadow to nickel dam
Sound is smaller.
According to decoating liquid provided by the present invention, it is preferable that the quality of the ethylenediamine, triethanolamine and BTA
Than for 1：0.005-1：0.01-0.1, more preferably 1：0.01-0.8：0.03-0.08.
According to decoating liquid provided by the present invention, in order to ensure nickel dam etch-rate, it is preferable that the content of the ethylenediamine
For 100-200g/L, the content of the triethanolamine is 1-100g/L, and the content of the BTA is 1-20g/L, described
The content of 2- NMFs is 10-100g/L, and the content of the oxidant is 50-100g/L.
According to decoating liquid provided by the present invention, it is preferable that the oxidant is m-nitrobenzene sodium sulfonate, in nitric acid extremely
Few one kind.
Present invention also offers the preparation method of decoating liquid described above, by the first corrosion inhibiter, the second corrosion inhibiter and oxygen
The agent mixed liquor soluble in water that formed is decoating liquid.
Present invention also offers a kind of strip method, methods described includes for surface being coated with layers of copper, the base material of nickel dam successively
It is immersed in decoating liquid and carries out strip, returns the nickel dam on layers of copper surface；Wherein, the decoating liquid is strip of the present invention
Liquid.
According to strip method provided by the present invention, it is preferable that the temperature of the decoating liquid is 80-100 DEG C.
The present invention is described in further detail with reference to specific embodiment.
Embodiment 1
1st, decoating liquid is prepared
By ethylenediamine 170g/L, triethanolamine 70g/L, BTA 7g/L, 2- NMF 70g/L and a nitro
Benzene sulfonic acid sodium salt 80g/L mixed dissolutions obtain decoating liquid A1.
2nd, strip takes the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in strip
Strip is carried out in liquid A1, the temperature of decoating liquid is 80 DEG C, and the strip time is 67s.Obtain strip part B1.
Embodiment 2
1st, decoating liquid is prepared
By ethylenediamine 120g/L, triethanolamine 10g/L, BTA 3g/L, 2- NMF 30g/L and a nitro
Benzene sulfonic acid sodium salt 60g/L mixed dissolutions obtain decoating liquid A2.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A2
Strip is carried out, the temperature of decoating liquid is 100 DEG C, and the strip time is 78s.Obtain strip part B2.
Embodiment 3
1st, decoating liquid is prepared
By ethylenediamine 100g/L, triethanolamine 1g/L, BTA 1g/L, 2- NMF 10g/L and a nitro
The g/L mixed dissolutions of benzene sulfonic acid sodium salt 50 obtain decoating liquid A3.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A3
Strip is carried out, the temperature of decoating liquid is 80 DEG C, and the strip time is 127s.Obtain strip part B3.
Embodiment 4
1st, decoating liquid is prepared
By ethylenediamine 200g/L, triethanolamine 100g/L, the g/L of BTA 10g/L, 2- NMF 100 and
Nitrobenzene sodium sulfonate 100g/L mixed dissolutions obtain decoating liquid A4.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A4
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 145s.Obtain strip part B4.
Embodiment 5
1st, decoating liquid is prepared
By ethylenediamine 150g/L, triethanolamine 50g/L, BTA 5g/L, 2- NMF 50g/L and a nitro
Benzene sulfonic acid sodium salt 90g/L mixed dissolutions obtain decoating liquid A5.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A5
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 59s.Obtain strip part B5.
Embodiment 6
1st, decoating liquid is prepared
By ethylenediamine 90g/L, triethanolamine 2.8g/L, BTA 7.2g/L, 2- NMF 100g/L and
Nitrobenzene sodium sulfonate 90g/L mixed dissolutions obtain decoating liquid A6.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A6
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 72s.Obtain strip part B6.
Embodiment 7
1st, decoating liquid is prepared
By ethylenediamine 150g/L, triethanolamine 85g/L, BTA 15g/L, 2- NMF 50g/L and a nitre
Base benzene sulfonic acid sodium salt 90g/L mixed dissolutions obtain decoating liquid A7.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A7
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 62s.Obtain strip part B7.
Embodiment 8
1st, decoating liquid is prepared
By ethylenediamine 100g/L, triethanolamine 80g/L, BTA 15g/L, 2- NMF 13g/L and a nitre
Base benzene sulfonic acid sodium salt 90g/L mixed dissolutions obtain decoating liquid A8.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A8
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 54s.Obtain strip part B8.
Embodiment 9
1st, decoating liquid is prepared
By ethylenediamine 200g/L, triethanolamine 1g/L, BTA 19g/L, 2- NMF 11g/L and a nitro
Benzene sulfonic acid sodium salt 90g/L mixed dissolutions obtain decoating liquid A9.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A9
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 60s.Obtain strip part B9.
Embodiment 10
1st, decoating liquid is prepared
Triethanolamine 80g/L, 2- NMF 50g/L and m-nitrobenzene sodium sulfonate 90g/L mixed dissolutions are moved back
Plating solution A10.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A10
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 57s.Obtain strip part B10.
Embodiment 11
1st, decoating liquid is prepared
Ethylenediamine 170g/L, 2- NMF 70g/L and m-nitrobenzene sodium sulfonate 80g/L mixed dissolutions are obtained into strip
Liquid A11.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A11
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 63s.Obtain strip part B11.
Embodiment 12
1st, decoating liquid is prepared
BTA 20g/L, 2- NMF 15g/L and m-nitrobenzene sodium sulfonate 80g/L mixed dissolutions are obtained
Decoating liquid A12.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A12
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 63s.Obtain strip part B12.
Embodiment 13
1st, decoating liquid is prepared
The g/L of 2- NMFs 50 and the g/L mixed dissolutions of m-nitrobenzene sodium sulfonate 80 obtain decoating liquid A13.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid A13
Strip is carried out, the temperature of decoating liquid is 90 DEG C, and the strip time is 63s.Obtain strip part B13.
Comparative example 1
1st, decoating liquid is prepared
Ethylenediamine 170g/L, triethanolamine 70g/L, BTA 7g/L and m-nitrobenzene sodium sulfonate 80g/L are mixed
Dissolving obtains decoating liquid CA1.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid CA1
Strip is carried out, the temperature of decoating liquid is 80 DEG C, and the strip time is 56s.Obtain strip part CB1.
Comparative example 2
1st, decoating liquid is prepared
The decoating liquid of embodiment 1 in Publication No. CN101775601A patent is used as decoating liquid CA2.
2nd, strip
Take the ABS plastic workpiece that nickel dam is coated with a piece of layers of copper, general 5 microns of nickel dam.It is then placed in decoating liquid CA2
Strip is carried out, the temperature of decoating liquid is 80 DEG C, and the strip time is 36s.Obtain strip part CB2.
Method of testing and result
Outward appearance：By strip part B1-B13 and CB1-CB2 clearly observe afterwards its nickel dam whether completely stripping and layers of copper whether by
Corrosion, the results are shown in Table 1.
Table 1
。
From table 1 it follows that after strip is carried out with the decoating liquid of the present invention, the nickel dam of coating surface is moved back completely
Remove, but layers of copper is not corroded, and the decoating liquid of Comparison study example carries out strip, layers of copper has corrosion.So with the present invention
Decoating liquid can ensure while strip nickel dam prevent layers of copper be corroded.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (8)
1. a kind of be used to strip the decoating liquid of layers of copper surface nickel dam, it is characterised in that the decoating liquid include the first corrosion inhibiter and
Oxidant；First corrosion inhibiter is N,N-dimethylformamide；The decoating liquid also includes the second corrosion inhibiter, and described second is slow
Erosion agent is at least one of ethylenediamine, triethanolamine, BTA；
The content of the DMF is 10-100g/L, and the content of the oxidant is 50-100g/L, described
The mass ratio of one corrosion inhibiter and second corrosion inhibiter is 1：1-20.
2. the decoating liquid according to claim 1 for being used to strip layers of copper surface nickel dam, it is characterised in that second inhibition
Agent is the mixture of ethylenediamine, triethanolamine and BTA.
3. the decoating liquid according to claim 2 for being used to strip layers of copper surface nickel dam, it is characterised in that the ethylenediamine,
The mass ratio of triethanolamine and BTA is 1：0.005-1：0.01-0.1.
4. the decoating liquid according to claim 3 for being used to strip layers of copper surface nickel dam, it is characterised in that the ethylenediamine
Content is 100-200g/L, and the content of the triethanolamine is 1-100g/L, and the content of the BTA is 1-20g/L.
5. decoating liquid according to claim 1, it is characterised in that the oxidant is in m-nitrobenzene sodium sulfonate, nitric acid
At least one.
6. the preparation method for being used to strip the decoating liquid of layers of copper surface nickel dam described in a kind of claim 1, it is characterised in that will
Oxidant, the first corrosion inhibiter mixed liquor soluble in water that formed are decoating liquid；The second corrosion inhibiter is added into mixed liquor.
A kind of 7. strip method for stripping layers of copper surface nickel dam, it is characterised in that methods described includes surface being coated with copper successively
Layer, the base material of nickel dam are immersed in decoating liquid and carry out strip, return the nickel dam on layers of copper surface；Wherein, the decoating liquid is right
It is required that the decoating liquid described in 1-5 any one.
8. the strip method of stripping layers of copper surface according to claim 7 nickel dam, it is characterised in that the temperature of the decoating liquid
Spend for 80-100 DEG C.
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| CN201410071837.5A CN104878388B (en) | 2014-02-28 | 2014-02-28 | It is a kind of to be used to strip decoating liquid of layers of copper surface nickel dam and preparation method thereof and strip method |
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| CN104878388B true CN104878388B (en) | 2018-03-27 |
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| CN109096894A (en) * | 2018-06-05 | 2018-12-28 | 电子科技大学中山学院 | High-temperature-resistant coating for surface of heating element of electric water heater and preparation method thereof |
| CN109778299B (en) * | 2019-02-22 | 2021-05-04 | 江门市瑞期精细化学工程有限公司 | Electrolytic stripping agent for copper-plated layer on surface of iron base material, and preparation method and stripping process thereof |
| CN110205631A (en) * | 2019-07-08 | 2019-09-06 | 范成勇 | Decoating liquid and strip method for ABS material stripping layers of copper surface nickel layer |
| CN112111741A (en) * | 2020-09-25 | 2020-12-22 | 深圳市祺鑫环保科技有限公司 | Tin stripping liquid copper protecting agent and tin stripping liquid |
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