CN101713068A - Chemical copper plating technique for plastic tube of fuel sensor in fuel tank - Google Patents
Chemical copper plating technique for plastic tube of fuel sensor in fuel tank Download PDFInfo
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- CN101713068A CN101713068A CN200910167676A CN200910167676A CN101713068A CN 101713068 A CN101713068 A CN 101713068A CN 200910167676 A CN200910167676 A CN 200910167676A CN 200910167676 A CN200910167676 A CN 200910167676A CN 101713068 A CN101713068 A CN 101713068A
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- plastic tube
- copper
- fuel tank
- copper plating
- fuel
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Abstract
The invention provides a chemical copper plating technique for a plastic tube of a fuel sensor in a fuel tank, which mainly comprises the following steps: (a) chemical-deoiling; (b) coarsening: mechanically or chemically etching to remove a hydrophobic layer, so that the surface is converted to be hydrophilic from being hydrophobic; (c) sensitizing: putting the plastic tube part in a solution containing stannous ions, so that an easily-oxidized bivalent tin layer is adsorbed on the surface; (d) activating: putting the sensitized plastic tube part in a solution containing silver ions to carry out the reduction, thereby obtaining a catalytic metallic silver layer; (e) chemical copper plating: putting the treated plastic tube of the fuel sensor in the fuel tank in a copper plating solution containing copper ion salts, metallic alkali, a complexing agent, a reducer, a stabilizer and an activator to carry out the redox reaction, thereby depositing metallic copper; and (f) electro-coppering: increasing the thickness of the copper layer. The technique of the invention has the advantages of simple method, easy control and adjustment, high solution deposition rate, high chemical stability, long service life and low cost. The invention solves the problems of quick self-decomposition and efficacy-loss of tank liquor, and incomplete copper layer covering in the traditional technique.
Description
Technical field
The present invention relates to a kind of processing method of plastic tube of fuel sensor in fuel tank electroless copper, more particularly, the present invention relates to by after this method processing, nonconducting plastic tube of fuel sensor in fuel tank has had the function of conduction, for electro-coppering provides prerequisite.The chemical copper plating technique for plastic tube that relates to during the present invention describes is not limited to the copper facing of plastics tubing chemistry, can also be applicable to the electro-coppering of other plastics dielectric material part.
Background technology
In the prior art,, improve labor productivity, reduce production costs, satisfy the property of product for saving metal, alleviate product weight, reducing manufacturing procedure.Usually all will to can not conduction, magnetic conduction, do not have welding property, do not have the metalluster plastic tube of fuel sensor in fuel tank to carry out electro-coppering, so that it has conduction, magnetic conduction and welding property, improve its mechanical property, improve anti ageing property, etch resistant properties and thermal stability.And the quality of plastic tube of fuel sensor in fuel tank electroless copper quality directly affects the copper-plated processing quality of whole plastic tube of fuel sensor in fuel tank.
The nonmetal chemical copper facing of prior art is according to the electroless copper principle at present, metal copper ion is reduced out under the effect of reductive agent in basic solution, behind pretreatment activating, to have catalysis ionic argent ion uniform deposition and cover on the piece surface, form typical replacement(metathesis)reaction:
Cu
+2+2HCHO+4OH
-→Cu+H
2+2H
2O+2HCOO
-
Electroless copper prescription and processing parameter that it adopts are generally: copper sulfate 10～20g/L, sodium hydroxide 16～20g/L, Seignette salt 30～35g/L, formaldehyde 10～20mL/L, 15～30 ℃ of temperature, time 20～40min.Copper sulfate provides metal copper ion Cu for solution in the prescription
+ 2, be main salt; When pH value in the solution remains on the numerical value (PH:11～13) of use range, improve Cu
+ 2Concentration, sedimentation velocity will increase, but the tendency of solution natural decomposition also increases thereupon.The effect of sodium hydroxide is to keep solution to be the strong basicity state.Formaldehyde is its reductive agent, and its reductive action and pH value have significant relationship, and the reductive action that pH value increases formaldehyde is strong more, and at this moment, the sedimentation velocity of copper improves, but the tendency of natural decomposition also increases.Seignette salt is a complexing agent, and purpose is to prevent that the form precipitation that cupric ion in the solution is copper hydroxide from separating out, and cupric ion is become the complex ion state.From the main effect of above-mentioned each composition and characteristic as seen, the common chemical copper plating solution is very unsettled, is loose and do not have a bonding force at this chemical plating of transmitter plastics tubing surface deposition thus.Mainly be because the generation of following reaction makes to occur solia particle in the solution:
2Cu
+2+HCHO+5OH
-→Cu
2O↓+3H
2O+HCOO
-
Cu
2O+H
2O→Cu+Cu
+2+2OH
-
The monovalence copper compound Cu that its reaction is generated
2O and by it and the metallic copper particulate that further generates, these particulates are scattered in the solution brokenly, become the catalytic center of solution natural decomposition, and the reaction that makes copper is not to be confined to catalytic surface, but generation Anywhere that can be in solution, thereby cause the solution instability.
In electroless copper, the stability of sedimentation velocity and solution is conflicting.Common high Speed Electroless Copper Plating Solution is poor stability often, and suitable interpolation stablizer helps the raising in solution life-span.The addition of stablizer must be controlled, and adds not have stabilization very little, add too much to cause the reaction of deposited copper significantly to be slowed down, even reaction stops.Suitably reduce the tendency that main salt concentration and naoh concentration also can reduce the solution natural decomposition.The solution instability is the disadvantage of traditional chemical copper-plating technique, and have that the self-decomposition of technology tank liquor is fast, fast, the chemical plating copper layer of losing efficacy cover imperfect, the copper-plated repair rate height of part, the defective that production efficiency is low.
Summary of the invention
Task of the present invention is that a kind of sedimentation velocity of proposition is very fast, chemical stability is better, work-ing life is longer, the chemical copper plating technique for plastic tube of fuel sensor in fuel tank that the metallic copper hiding power is strong, by the plastic tube of fuel sensor in fuel tank after the electroless copper processing of the present invention, can reach copper plate after the electro-coppering and have and the matrix good bonding force, copper coating has beauty rose-colored of metalluster.
In order to achieve the above object, a kind of chemical copper plating technique for plastic tube of fuel sensor in fuel tank provided by the invention is characterized in that, this processing method is made up of following steps:
(a) electrochemical deoiling: plastic tube of fuel sensor in fuel tank is put into alkaline solution carry out electrochemical deoiling;
(b) alligatoring: above-mentioned plastic tube of fuel sensor in fuel tank is removed water-repellent layer by machinery or chemical etching, make the surface by hydrophobic become hydrophilic;
(c) sensitization: above-mentioned plastics tubing part is put into the solution that contains stannous ion, make the Bivalent Tin of the easy oxidation of its surface adsorption one deck;
(d) activation: the plastics tubing part after the above-mentioned sensitization is put into the solution that contains silver ions, restore the argent that one deck has katalysis, the catalyzer of redox reaction during as electroless copper;
(e) electroless copper: the plastic tube of fuel sensor in fuel tank after the above-mentioned processing is placed in carries out redox reaction, metal refining copper in the copper plating solution that contains cupric ion salt, metal base, network and agent, reductive agent, stablizer, activator;
(f) behind the electroless copper, carry out the sulfuric acid type acid copper plating immediately, increase the thickness of copper layer.
The present invention has following beneficial effect than prior art.
Adopt the method for electroless plating to make the plastics tubing surface obtain the rete that one deck can conduct electricity, it can be electroplated.Rete has the red-purple of metallic copper.Re-plating copper behind this electroless copper, copper plate that obtains and plastic tube of fuel sensor in fuel tank matrix have extraordinary bonding force, and the copper facing crystallization is careful, even, and has beautiful rose-colored metalluster.Solved conventional chemical copper plating solution instability, easily decomposed, rete covers incomplete defective; Improved the bearing capacity of unit volume solution; The copper-plated needs of plastic tube of fuel sensor in fuel tank have been satisfied.
Chemical copper plating technique for plastic tube of fuel sensor in fuel tank method provided by the invention is simple, is easy to control adjustment, and solution deposition speed is very fast, chemical stability is better, long service life.Solved that the self-decomposition of traditional technology tank liquor is fast, fast, the chemical plating copper layer of losing efficacy covers incomplete problem.
The present invention and traditional technology compare, and chemical-copper-plating process is safeguarded simple, and cost is low, and the copper facing quality is good.The copper-plated repair rate of part reduces more than 65%, and production efficiency improves twice, but about 25 yuan of every liter of economical with materials cost is added the cost savings that the part of saving is reprocessed expense and enhanced productivity and bring, and can produce the hundreds thousand of units of economic benefit every year.
Embodiment
To further illustrate the present invention in following examples, these embodiment only are used to the present invention is described and to the present invention without limits.
In following examples, at normal temperatures and pressures, technology is put into alkaline solution with plastic tube of fuel sensor in fuel tank routinely, carries out the electrochemical deoiling pre-treating technology.
Plastic tube of fuel sensor in fuel tank needs to carry out electrochemical deoiling before electroless copper usually in alkaline solution, is the important pre-treating technology of plastic tube of fuel sensor in fuel tank electroless copper.To remove surperficial grease.The general alkaline tank liquor that adopts based on NaOH solution, the concentration of NaOH is 30～40g/L, adds a certain amount of Na
2CO
3, its Na
2CO
3Concentration be 20～30g/L, add a certain amount of Na again
3PO
412H
2O, Na
3PO
412H
2The concentration of O is 20～30g/L and minor N a
2SiO
3Concentration 3～5g/L, service temperature is 60～80 ℃, the time is 15～30min.
Plastic tube of fuel sensor in fuel tank carries out will carrying out roughening treatment behind the electrochemical deoiling in alkaline solution: plastic tube of fuel sensor in fuel tank is removed hydrophobic surface by machinery or chemical etching reach hydrophilic purpose, and the parts list area is increased, the bonding force during with the raising electroless copper between plastic tube of fuel sensor in fuel tank surface and the coating.
The machinery alligatoring can adopt 280#～320# waterproof abrasive paper to be polished in the plastic tube of fuel sensor in fuel tank surface, removes hydrophobic membranous layer and improves the parts list area.
Chemical roughen is part to be put into contain chromic anhydride, vitriolic solution, carbon carbochain, hydrocarbon chain, carbon nitrogen chain, the carbon oxygen chain on plastic tube of fuel sensor in fuel tank surface are interrupted, make it to produce many fine crackles, dell or groove, piece surface by hydrophobic become hydrophilic, and hydroxyl, the sulfydryl on plastic tube of fuel sensor in fuel tank surface dissolved, produce active group and metal plating and form valence bond, improved the bonding force of plastic tube of fuel sensor in fuel tank matrix and metallic copper coating.
Part after roughening treatment will carry out sensitization: part is put into the solution that contains stannous ion, make the Bivalent Tin of the easy oxidation of plastic tube of fuel sensor in fuel tank surface adsorption one deck, so that when next step activation treatment catalytic metal is restored.
And then activate: part is put into the solution that contains silver ions, make the plastics tubing surface produce the argent that one deck has katalysis, the catalyzer of redox reaction during as electroless copper.
Just can carry out electroless copper through the part after the above-mentioned processing.Electroless copper is the plastic tube of fuel sensor in fuel tank after the above-mentioned processing to be placed in carry out redox reaction, metal refining copper in the copper plating solution that contains cupric ion, metal base, network and agent, reductive agent, stablizer, activator.
The salt of described cupric ion is copper sulfate, and metal base is a sodium hydroxide, and described complexing agent is a tartrate, and described reductive agent is a formaldehyde, and stablizer is a yellow soda ash, and activator is a nickelous chloride.
Electroless copper is by copper sulfate 5～30g/L, sodium hydroxide 5～30g/L, tartrate 20～45g/L, formaldehyde 10～20mL/L, yellow soda ash 5～20g/L, nickelous chloride 5～20g/L content preparation copper plating solution.The temperature of chemical copper plating technique for plastic tube of fuel sensor in fuel tank is 10～30 ℃, and the time is 15～45min.
Carry out the sulfuric acid type acid copper plating behind the electroless copper immediately, the thickness that increases the copper layer satisfies the plastic tube of fuel sensor in fuel tank special requirement.
Embodiment 1
Pre-treatment non-metal workpiece plating is routinely carried out.The method of thickening electro-coppering is undertaken by the sulfuric acid type copper-plating technique.Chemical copper plating solution is pressed:
Copper sulfate 25g/L, sodium hydroxide 25g/L, tartrate 35g/L, formaldehyde 15mL/L, yellow soda ash 15g/L, the preparation of nickelous chloride 18g/L content.The tank liquor temperature that plastic tube of fuel sensor in fuel tank carries out electroless copper is 21 ℃, time 20min.
Range estimation copper plate outward appearance: the crystallization uniform and delicate, color is the rose of band metalluster.
Coating and basal body binding force: draw 2.5 * 2.5 lattices with single-edge blade on test specimen, draw to matrix, the copper layer does not come off.
Embodiment 2
Pre-treatment non-metal workpiece plating is routinely carried out, and the method for thickening electro-coppering is undertaken by the sulfuric acid type copper-plating technique.Chemical copper plating solution is pressed:
Copper sulfate 12g/L, sodium hydroxide 12g/L, tartrate 25g/L, formaldehyde 15mL/L, yellow soda ash 6g/L, the preparation of nickelous chloride 10g/L content, the tank liquor temperature that plastic tube of fuel sensor in fuel tank carries out electroless copper is 15 ℃, time 40min.
Range estimation copper plate outward appearance: the crystallization uniform and delicate, color is the rose of band metalluster.
Coating and basal body binding force: draw 2.5 * 2.5 lattices with single-edge blade on test specimen, draw to matrix, the copper layer does not come off.
Embodiment 3
Pre-treatment non-metal workpiece plating is routinely carried out, and the method for thickening electro-coppering is undertaken by sulfuric acid type technology.Chemical copper plating solution is pressed:
Copper sulfate 5g/L, sodium hydroxide 5g/L, tartrate 40g/L, formaldehyde 18mL/L, yellow soda ash 10g/L, the preparation of nickelous chloride 15g/L content.The tank liquor temperature that plastic tube of fuel sensor in fuel tank carries out electroless copper is 28 ℃, time 35min.
Range estimation copper plate outward appearance: the crystallization uniform and delicate, color is the rose of band metalluster.
Coating and basal body binding force: draw 2.5 * 2.5 lattices with single-edge blade on test specimen, draw to matrix, the copper layer does not come off.
Claims (6)
1. a chemical copper plating technique for plastic tube of fuel sensor in fuel tank is characterized in that, this processing method is made up of following steps:
(a) electrochemical deoiling: plastic tube of fuel sensor in fuel tank is put into alkaline solution carry out electrochemical deoiling;
(b) alligatoring: above-mentioned plastic tube of fuel sensor in fuel tank is removed water-repellent layer by machinery or chemical etching, make the surface by hydrophobic become hydrophilic;
(c) sensitization: above-mentioned plastics tubing part is put into the solution that contains stannous ion, make the Bivalent Tin of the easy oxidation of its surface adsorption one deck;
(d) activation: the plastics tubing part after the above-mentioned sensitization is put into the solution that contains silver ions, restore the argent that one deck has katalysis, the catalyzer of redox reaction during as electroless copper;
(e) electroless copper: the plastic tube of fuel sensor in fuel tank after the above-mentioned processing is placed in carries out redox reaction, metal refining copper in the copper plating solution that contains cupric ion salt, metal base, network and agent, reductive agent, stablizer, activator;
(f) behind the electroless copper, carry out the sulfuric acid type acid copper plating immediately, increase the thickness of copper layer.
2. chemical copper plating technique for plastic tube of fuel sensor in fuel tank according to claim 1 is characterized in that, described cupric ion salt is copper sulfate, metal base is a sodium hydroxide, and described complexing agent is a tartrate, and described reductive agent is a formaldehyde, stablizer is a yellow soda ash, and activator is a nickelous chloride.
3. chemical copper plating technique for plastic tube of fuel sensor in fuel tank according to claim 2, it is characterized in that, in the described copper plating solution of preparation, copper sulfate content is 5～30g/L, sodium hydrate content is 5～30g/L, and tartrate content is 20～45g/L, and formaldehyde content is 10～20mL/L, yellow soda ash 5～20g/L, nickelous chloride 5～20g/L.
4. chemical copper plating technique for plastic tube of fuel sensor in fuel tank according to claim 3 is characterized in that, the temperature of chemical copper plating technique for plastic tube of fuel sensor in fuel tank is 10～30 ℃, and the time is 15～45min.
5. chemical copper plating technique for plastic tube of fuel sensor in fuel tank according to claim 1 is characterized in that, the alkaline solution of electrochemical deoiling contains the NaOH that concentration is 30～40g/L, and concentration is the Na of 20～30g/L
2CO
3, concentration is the Na of 20～30g/L
3PO
412H
2The Na of O and concentration 3～5g/L
2SiO
3
6. chemical copper plating technique for plastic tube of fuel sensor in fuel tank according to claim 5 is characterized in that, the service temperature of electrochemical deoiling is 60～80 ℃, and the time is 15～30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910167676A CN101713068A (en) | 2009-09-16 | 2009-09-16 | Chemical copper plating technique for plastic tube of fuel sensor in fuel tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910167676A CN101713068A (en) | 2009-09-16 | 2009-09-16 | Chemical copper plating technique for plastic tube of fuel sensor in fuel tank |
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| Publication Number | Publication Date |
|---|---|
| CN101713068A true CN101713068A (en) | 2010-05-26 |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152880A (en) * | 2014-07-17 | 2014-11-19 | 广东致卓精密金属科技有限公司 | Electroless copper plating method for nonmetallic surface |
| CN109037421A (en) * | 2018-08-01 | 2018-12-18 | 南阳师范学院 | A kind of low temperature preparation method of great power LED ceramic copper-clad plate |
| CN113564569A (en) * | 2021-03-18 | 2021-10-29 | 麦德美科技（苏州）有限公司 | Chemical coarsening and metallization process method of LCP plastic |
-
2009
- 2009-09-16 CN CN200910167676A patent/CN101713068A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152880A (en) * | 2014-07-17 | 2014-11-19 | 广东致卓精密金属科技有限公司 | Electroless copper plating method for nonmetallic surface |
| CN109037421A (en) * | 2018-08-01 | 2018-12-18 | 南阳师范学院 | A kind of low temperature preparation method of great power LED ceramic copper-clad plate |
| CN113564569A (en) * | 2021-03-18 | 2021-10-29 | 麦德美科技（苏州）有限公司 | Chemical coarsening and metallization process method of LCP plastic |
| CN113564569B (en) * | 2021-03-18 | 2023-10-31 | 麦德美科技（苏州）有限公司 | Chemical roughening and metalizing process for LCP plastic |
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Open date: 20100526 |