CN106337172A - Method for palladium-free activation chemical copper plating of surface of carbon steel - Google Patents
Method for palladium-free activation chemical copper plating of surface of carbon steel Download PDFInfo
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- CN106337172A CN106337172A CN201610765264.5A CN201610765264A CN106337172A CN 106337172 A CN106337172 A CN 106337172A CN 201610765264 A CN201610765264 A CN 201610765264A CN 106337172 A CN106337172 A CN 106337172A
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- nickel sulfate
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/38—Coating with copper
- C23C18/40—Coating with copper using reducing agents
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
- C23C18/1837—Multistep pretreatment
- C23C18/1844—Multistep pretreatment with use of organic or inorganic compounds other than metals, first
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- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemically Coating (AREA)
Abstract
The invention provides a method for palladium-free activation chemical copper plating of the surface of carbon steel. The method specifically includes the steps of pretreatment of a carbon steel matrix, activation of the carbon steel matrix, sensibilization of the carbon steel matrix, and chemical copper plating of the carbon steel matrix, specifically, the pretreated carbon steel matrix is activated in a methanol solution containing sodium borohydride and a hydrochloric acid solution containing nickel sulfate sequentially, the carbon steel matrix is then sensibilized with a stannous chloride solution, and finally the surface of the carbon steel is subjected to chemical copper plating so that a compact copper coating can be formed on the surface of the carbon steel. According to the method provided by the invention, activation of the carbon steel matrix is completed through the low-cost solutions, nickel is adopted as an autocatalysis center for chemical copper plating of the surface of the carbon steel and replaces precious metal palladium, the raw materials can be obtain easily, cost is low, the production process is simple and convenient to implement, the binding force of the coating is high, and reproducibility is high.
Description
Technical field
The present invention relates to the electroless copper technical field of carbon steel, a kind of more particularly to carbon steel surface no-palladium activating chemical plating
The method of copper.
Background technology
Iron and steel has a wide range of applications in the industry, but the ferrous materials that the whole world is lost because of corrosion every year account for total steel
The 1/5 about of ferrum yield, causes serious destroying in some instances it may even be possible to jeopardize the life security of the people to modern Economy Development.Change
Learning plating is a kind of critically important method improving iron and steel decay resistance.Chemical plating is under the catalytic action of metal surface, passes through
Redox reaction is controlled to produce the process of metal deposit.Chemical plating process and other surfaces treatment technology such as plating, machinery
Plating, spraying etc. compare it is not necessary to additional power source, easy to operate, coating porosity is low, outward appearance is good and has excellent cladding
Property, every position that can touch plating solution, can obtain more uniform coating, high adhesive force, good corrosion-resistant, wear-resisting
It is made to be widely used in industries such as machinery, chemical industry, automobile and military projects etc. performance.
Carbon steel chemistry copper facing has copper plating rate soon, and stability is high, and operating temperature and the solution concentration scope of application are wider, copper
Layer is fine and close, the features such as have splendid adhesion.Carbon steel copper facing not only makes it maintain the original various superioritys of carbon steel, and makes
It is wear-resistant, corrosion resisting property, ageing-resistant performance, UV resistant irradiation performance and exterior decorative effect are better than ordinary carbon steel.Meanwhile,
Carbon steel copper facing fully maintains the special original surface of carbon steel, gloss and intensity, and its physics, chemistry, mechanical performance are also uninfluenced,
Following process can directly be carried out, can effectively play the complete characteristic of rustless steel this environmental protection metal.
In the pre-treatment of current electroless copper, activation generally uses precious metal palladium as activator, in plating piece table
Face produces one layer of active centre, although the method can obtain the preferable coat of metal, often there is Metal Palladium expensive
Problem, lead to production cost too high.
Content of the invention
In order to solve problems of the prior art, the present invention is lived to carbon steel surface using the activator of no palladium
Change, form nickel active centre on carbon steel surface, carry out electroless copper, obtain the good metallic copper plating of corrosion resisting property on carbon steel surface
Layer, effectively reduces production cost.
Specifically, the method for the carbon steel surface no-palladium activating electroless copper that the present invention provides, specifically includes following steps:
The pretreatment of s1: plain steel
Mechanical grinding is carried out to plain steel to be plated, except stain of derusting；Again the plain steel after polishing is placed in 55-60 DEG C
Electrochemical deoiling liquid in impregnate 20-30min, carry out electrochemical deoiling；Plain steel after electrochemical deoiling is carried out, and uses 5-
10%h2so4Solution, at a temperature of 55-60 DEG C, impregnates 20-30s, takes out and clean further；
The activation of s2: plain steel
Prepare methanol solution, the hydrochloric acid solution of nickel sulfate of sodium borohydride respectively, the methanol solution of sodium borohydride is alkalescence,
The hydrochloric acid solution of nickel sulfate is acidity, and in the methanol solution of described sodium borohydride, sodium borohydride concentration is 70-140g/l, described sulfur
In the hydrochloric acid solution of sour nickel, concentration of nickel sulfate is 30-70g/l, and the plain steel cleaning further is soaked at 25-45 DEG C successively
Enter in the methanol solution of sodium borohydride and the hydrochloric acid solution of nickel sulfate and activated, total soak time is 20-40min；
The sensitization of s3: plain steel
Prepare sensitizing solution, the plain steel after activation is immersed 5-12s in 25-45 DEG C of sensitizing solution；Described sensitizing solution
Consist of: stannous chloride 32-35g/l, hydrochloric acid 32-35ml/l, solvent is water；
The electroless copper of s4: plain steel
Copper electrolyte will be contained and be heated to 55-60 DEG C, and electroless copper be carried out to the plain steel after sensitization, obtains after simple process
Target product；Wherein, described consisting of containing copper electrolyte: copper sulfate 10-12g/l, sodium hypophosphite 38-42g/l, nickel sulfate
1.5-2.5g/l, sodium citrate 25-35g/l, second bipyridine 10-15mg/l, solvent is water, and the ph value containing copper electrolyte is 8.2-
8.6.
Preferably, the concretely comprising the following steps of described mechanical grinding: plain steel uses 120#, 320#, 500# sand paper careful successively
Polishing plain steel surface, removes surface and substantially becomes rusty stain.
Preferably, the consisting of of described electrochemical deoiling liquid: sodium carbonate 50g/l, sodium phosphate 30g/l, sodium silicate 10g/l, hydrogen
Sodium oxide 100g/l, solvent is water.
Preferably, the compound method of the methanol solution of described sodium borohydride is: under room temperature, take 50ml methanol, thereto plus
Enter 1.5-1.62g sodium hydroxide to be used for adjusting solution is alkalescence, after fully dissolving, adds 7-14g sodium borohydride, fully stirs
Mix, with methanol constant volume to 100ml, obtain final product the methanol solution of described sodium borohydride.
Preferably, the compound method of the hydrochloric acid solution of described nickel sulfate is: under room temperature, takes 50ml water, is added thereto to 3-
The nickel sulfate of 7g, after fully dissolving, adds 5-5.5ml hydrochloric acid, is settled to 100ml with water, obtain final product the hydrochloric acid of described nickel sulfate
Solution.
Preferably, described consisting of containing copper electrolyte: copper sulfate 10g/l, sodium hypophosphite 40g/l, nickel sulfate 1.75-
2.00g/l, sodium citrate 30g/l, second bipyridine 12mg/l, the ph value containing copper electrolyte is 8.5.
Preferably, in s2, activation temperature is 30-40 DEG C, and total soak time is 25-35min.
Preferably, in s2, the soak time in the methanol solution of immersion sodium borohydride is 5-20min, immersion nickel sulfate
Soak time in hydrochloric acid solution is 5-20min.
Preferably, in s2, in the hydrochloric acid solution of described nickel sulfate, concentration of nickel sulfate is 50-70g/l.
The present invention on plain steel surface through pretreatment such as mechanical grinding, electrochemical deoiling, pickling, washings, then successively
Activated through the methanol solution containing sodium borohydride and the hydrochloric acid solution containing nickel sulfate, then carried out with stannous chloride solution
Sensitization, is finally carried out electroless copper to carbon steel surface, is completed the activation of plain steel using low-cost solution, then this basis
On, carry out the self-catalysis center of electroless copper as carbon steel surface using nickel, with carrying out electroless copper containing copper electrolyte, in carbon steel table
One layer of fine and close copper coating is defined on face, there is raw material and be easy to get, with low cost, production technology is easy, and binding force of cladding material is good, resistance to
The high feature of erosion function admirable, repeatability.
Brief description
The copper plate outward appearance picture that Fig. 1 provides for the embodiment of the present invention 1；
The copper plate outward appearance picture that Fig. 2 provides for the embodiment of the present invention 2.
Specific embodiment
In order that those skilled in the art more fully understand that technical scheme can be practiced, with reference to concrete
The invention will be further described for embodiment, but illustrated embodiment is not as a limitation of the invention.
Used reagent in following examples, if no specified otherwise, all can be bought by commercial sources and obtain, involved
The method arriving, if no specified otherwise, is conventional method.
A kind of method of carbon steel surface no-palladium activating electroless copper, specifically includes following steps:
The pretreatment of s1: plain steel
Mechanical grinding is carried out to plain steel to be plated, except stain of derusting；Again the plain steel after polishing is placed in 55-60 DEG C
Electrochemical deoiling liquid in impregnate 20-30min, carry out electrochemical deoiling；Plain steel after electrochemical deoiling is carried out, and uses 5-
10%h2so4Solution, at a temperature of 55-60 DEG C, impregnates 20-30s, takes out and clean further；
The activation of s2: plain steel
Prepare methanol solution, the hydrochloric acid solution of nickel sulfate of sodium borohydride respectively, in the methanol solution of described sodium borohydride
Sodium borohydride concentration is 70-140g/l, and in the hydrochloric acid solution of described nickel sulfate, concentration of nickel sulfate is 30-70g/l, will be clear further
The plain steel washed immerses in the methanol solution of sodium borohydride and the hydrochloric acid solution of nickel sulfate at 25-45 DEG C successively is lived
Change, total soak time is 20-40min；
The sensitization of s3: plain steel
Prepare sensitizing solution, the plain steel after activation is immersed 5-12s in 25-45 DEG C of sensitizing solution；, described sensitizing solution
Consist of: stannous chloride 32-35g/l, hydrochloric acid 32-35ml/l, solvent is water；
The electroless copper of s4: plain steel
Copper electrolyte will be contained and be heated to 55-60 DEG C, and electroless copper be carried out to the plain steel after sensitization, obtains after simple process
Target product；Wherein, described consisting of containing copper electrolyte: copper sulfate 10-12g/l, sodium hypophosphite 38-42g/l, nickel sulfate
1.5-2.5g/l, sodium citrate 25-35g/l, second bipyridine 10-15mg/l, solvent is water, and the ph value containing copper electrolyte is 8.2-
8.6.
Below detailed illustration is carried out to the present invention with specific embodiment.
Embodiment 1
The carbon steel coupon of a size of 50mm × 25mm × 2mm is carefully polished surface with 120#, 320#, 500# sand paper, removes
Substantially becoming rusty stain in surface, impregnates 30min afterwards in 60 DEG C of electrochemical deoiling liquid, the consisting of of this electrochemical deoiling liquid: sodium carbonate
50g/l, sodium phosphate 30g/l, sodium silicate 10g/l, sodium hydroxide 100g/l, solvent is water；After carbon steel coupon after dipping is taken out
Deionized water is cleaned, and after cleaning, uses 10%h2so4Solution, at a temperature of 60 DEG C, impregnates 30s, cleans further.
Prepare the methanol solution of sodium borohydride and the hydrochloric acid solution of nickel sulfate, wherein, the methanol solution of sodium borohydride respectively
Compound method be: under room temperature, take 50ml methanol, be added thereto to 1.5g sodium hydroxide, after fully dissolving, add 14g boron
Sodium hydride, is sufficiently stirred for, and with methanol constant volume to 100ml, obtains final product the first of the described sodium borohydride that sodium borohydride concentration is 140g/l
Alcoholic solution；
The compound method of the hydrochloric acid solution of nickel sulfate is: under room temperature, takes 50ml water, is added thereto to the nickel sulfate of 5g, fills
After dividing dissolving, add 5ml hydrochloric acid, be settled to 100ml with water, obtain final product the salt of the described nickel sulfate that concentration of nickel sulfate is 50g/l
Acid solution.
Carbon steel coupon after cleaning is immersed at 35 DEG C successively the methanol solution dipping 10min of above-mentioned sodium borohydride, above-mentioned
The hydrochloric acid solution dipping 15min of nickel sulfate, completes activation process.Carbon steel coupon after activation is once purged, with by consisting of chlorination
Stannous 32g/l, hydrochloric acid 32ml/l, solvent is the sensitizing solution of water, is sensitized 10s at 45 DEG C.Carbon steel coupon after sensitization is once purged,
Put in the plating solution of electroless copper, plating solution is by 10g/l copper sulfate, 40g/l sodium hypophosphite, 2.00g/l nickel sulfate, 30g/l lemon
Lemon acid sodium, 12mg/l second bipyridine composition, ph value is 8.5, and bath temperature is 55 DEG C, plating 30min, and deionized water is clear afterwards
Wash, dry in 90 DEG C of baking ovens, complete the electroless copper of carbon steel surface no-palladium activating.
The outward appearance of the sample copper plate obtained by embodiment 1 is observed, and its performance is tested, specifically such as
Under,
The outward appearance picture of the sample copper plate obtained by embodiment 1 is as shown in figure 1, the outward appearance of obtained sample copper plate
Coppery, brighter, uniformly, coating area coverage is 100% to coating.
Detection for the adhesion of the sample copper plate obtained by embodiment 1 adopts two methods, specific as follows.
1. according to gb/t 5,270 1985 " metal cladding (the deposition layer and chemical deposition layer) attachment on metallic matrix
Strength Testing Methods ", using cross cut test method: take a blade to become 30 ° of acute angle converted steel to draw knife, marked in coating surface with knife
The length of side is the square lattice of 1mm, firmly drawing knife by steel during operation makes blade scratch whole coating completely, examines and scratches
Copper plate whether there is the place coming off from matrix.Do not occur on the copper plate side that result is scratched and come off, result shows
Adhesion between coating and zine plate matrix is good.
2. using the adhesion situation between scarification qualitative analyses coating and carbon steel coupon surface: using pocket knife on coating
Draw 5mm × 5mm square lattice, then plating piece is heated to 150 DEG C, and after being incubated 30min, take out to be immersed in the water and rapidly cool down
To room temperature, take out and observe matrix surface whether outlet peeling.Result shows, matrix surface does not all occur skin effect phenomenon, explanation
Coating is good with basal body binding force.
Detection for the corrosion resistance of the sample copper plate obtained by embodiment 1 is specific as follows.
Have detected the corrosion resisting property of sample copper plate using 3.5% sodium chloride solution, weighed with corrosion rate corrosion proof
Good and bad: the sample obtained by embodiment 1 is placed in 4 hours in 3.5% sodium chloride solution, 90 DEG C of drying 30min, weigh carbon respectively
Quality before steel disc plating and after plating, corrosion rate is:
V=(m2- m1)/4m2, (m2Quality before immersion, m1Quality after immersion), calculating gained corrosion rate is
5.87 ‰ it is seen then that copper plate corrosion resistance is good per hour.
Embodiment 2
The carbon steel coupon of a size of 50mm × 25mm × 2mm is carefully polished surface with 120#, 320#, 500# sand paper, removes
Substantially becoming rusty stain in surface, impregnates 20min afterwards in 55 DEG C of electrochemical deoiling liquid, the consisting of of this electrochemical deoiling liquid: sodium carbonate
50g/l, sodium phosphate 30g/l, sodium silicate 10g/l, sodium hydroxide 100g/l, solvent is water；After carbon steel coupon after dipping is taken out
Deionized water is cleaned, and after cleaning, uses 5%h2so4Solution, at a temperature of 55 DEG C, impregnates 20s, cleans further.
Prepare the methanol solution of sodium borohydride and the hydrochloric acid solution of nickel sulfate, wherein, the methanol solution of sodium borohydride respectively
Compound method be: under room temperature, take 50ml methanol, be added thereto to 1.62g sodium hydroxide, after fully dissolving, add 7g boron
Sodium hydride, is sufficiently stirred for, and with methanol constant volume to 100ml, obtains final product the methanol of the described sodium borohydride that sodium borohydride concentration is 70g/l
Solution；
The compound method of the hydrochloric acid solution of nickel sulfate is: under room temperature, takes 50ml water, is added thereto to the nickel sulfate of 7g, fills
After dividing dissolving, add 5.5ml hydrochloric acid, be settled to 100ml with water, obtain final product the described nickel sulfate that concentration of nickel sulfate is 70g/l
Hydrochloric acid solution.
Carbon steel coupon after cleaning is immersed at 40 DEG C successively the methanol solution dipping 15min of above-mentioned sodium borohydride, above-mentioned
Nickel sulfate hydrochloric acid solution impregnates 25min, completes activation process.Carbon steel coupon after activation is once purged, with by consisting of protochloride
Stannum 35g/l, hydrochloric acid 35ml/l, solvent is the sensitizing solution of water, is sensitized 12s at 25 DEG C.
Carbon steel coupon after sensitization is once purged, puts in the plating solution of electroless copper, plating solution by 12g/l copper sulfate, 38g/l time
Sodium phosphite, 1.5g/l nickel sulfate, 25g/l sodium citrate, 10mg/l second bipyridine composition, ph value is 8.2, and bath temperature is 60
DEG C, deionized water cleaning after plating 25min, dry in 90 DEG C of baking ovens, complete the electroless copper of carbon steel surface no-palladium activating.
The outward appearance of the sample copper plate obtained by embodiment 2 is observed, and its performance is tested, specifically such as
Under,
The outward appearance picture of the sample copper plate obtained by embodiment 2 is as shown in Fig. 2 the outward appearance of obtained sample copper plate
Copper, light, uniformly, coating area coverage is 100% to coating.
Detection for the adhesion of the sample copper plate obtained by embodiment 2 adopts two methods, specific as follows.
1. according to gb/t 5,270 1985 " metal cladding (the deposition layer and chemical deposition layer) attachment on metallic matrix
Strength Testing Methods ", using cross cut test method: take a blade to become 30 ° of acute angle converted steel to draw knife, marked in coating surface with knife
The length of side is the square lattice of 1mm, firmly drawing knife by steel during operation makes blade scratch whole coating completely, examines and scratches
Copper plate whether there is the place coming off from matrix.Do not occur on the copper plate side that result is scratched and come off, result shows
Adhesion between coating and zine plate matrix is good.
2. using the adhesion situation between scarification qualitative analyses coating and carbon steel coupon surface: using pocket knife on coating
Draw 5mm × 5mm square lattice, then plating piece is heated to 150 DEG C, and after being incubated 30min, take out to be immersed in the water and rapidly cool down
To room temperature, take out and observe matrix surface whether outlet peeling.Result shows, matrix surface does not all occur skin effect phenomenon, explanation
Coating is good with basal body binding force.
Detection for the corrosion resistance of the sample copper plate obtained by embodiment 2 is specific as follows.
Have detected the corrosion resisting property of sample copper plate using 3.5% sodium chloride solution, weighed with corrosion rate corrosion proof
Good and bad: the sample obtained by embodiment 2 is placed in 4 hours in 3.5% sodium chloride solution, 90 DEG C of drying 30min, weigh carbon respectively
Quality before steel disc plating and after plating, corrosion rate is:
V=(m2- m1)/4m2, (m2Quality before immersion, m1Quality after immersion), calculating gained corrosion rate is
7.15 ‰ it is seen then that copper plate corrosion resistance is good per hour.
Embodiment described above is only the preferred embodiment lifted for absolutely proving the present invention, and its protection domain does not limit
In this.Equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, all in the protection of the present invention
Within the scope of, protection scope of the present invention is defined by claims.
Claims (9)
1. a kind of method of carbon steel surface no-palladium activating electroless copper is it is characterised in that specifically include following steps:
The pretreatment of s1: plain steel
Mechanical grinding is carried out to plain steel to be plated, except stain of derusting；Again the plain steel after polishing is placed in 55-60 DEG C of change
Learn in degreasing fluid and impregnate 20-30min, carry out electrochemical deoiling；Plain steel after electrochemical deoiling is carried out, and uses 5-10%
h2so4Solution, at a temperature of 55-60 DEG C, impregnates 20-30s, takes out and clean further；
The activation of s2: plain steel
Prepare methanol solution, the hydrochloric acid solution of nickel sulfate of sodium borohydride, boron hydrogen in the methanol solution of described sodium borohydride respectively
Change na concn is 70-140g/l, and in the hydrochloric acid solution of described nickel sulfate, concentration of nickel sulfate is 30-70g/l, by clean further
Plain steel immerses successively at 25-45 DEG C in the methanol solution of sodium borohydride and the hydrochloric acid solution of nickel sulfate and is activated, always
Soak time is 20-40min；
The sensitization of s3: plain steel
Prepare sensitizing solution, the plain steel after activation is immersed 5-12s in 25-45 DEG C of sensitizing solution；The composition of described sensitizing solution
For: stannous chloride 32-35g/l, hydrochloric acid 32-35ml/l, solvent is water；
The electroless copper of s4: plain steel
Copper electrolyte will be contained and be heated to 55-60 DEG C, and electroless copper be carried out to the plain steel after sensitization, after simple process, obtains target
Product；Wherein, described consisting of containing copper electrolyte: copper sulfate 10-12g/l, sodium hypophosphite 38-42g/l, nickel sulfate 1.5-
2.5g/l, sodium citrate 25-35g/l, second bipyridine 10-15mg/l, solvent is water, and the ph value containing copper electrolyte is 8.2-8.6.
2. the method for carbon steel surface according to claim 1 no-palladium activating electroless copper is it is characterised in that described machinery is beaten
The concretely comprising the following steps of mill: plain steel is carefully polished plain steel surface with 120#, 320#, 500# sand paper successively, removes surface
Substantially rust stain.
3. the method for carbon steel surface according to claim 1 no-palladium activating electroless copper is it is characterised in that described chemistry removes
The consisting of of fluid: sodium carbonate 50g/l, sodium phosphate 30g/l, sodium silicate 10g/l, sodium hydroxide 100g/l, solvent is water.
4. the method for carbon steel surface according to claim 1 no-palladium activating electroless copper is it is characterised in that described hydroboration
The compound method of the methanol solution of sodium is: under room temperature, takes 50ml methanol, is added thereto to 1.5-1.62g sodium hydroxide, fully molten
Xie Hou, adds 7-14g sodium borohydride, is sufficiently stirred for, and with methanol constant volume to 100ml, the methanol obtaining final product described sodium borohydride is molten
Liquid.
5. the method for carbon steel surface according to claim 1 no-palladium activating electroless copper is it is characterised in that described nickel sulfate
The compound method of hydrochloric acid solution be: under room temperature, take 50ml water, be added thereto to the nickel sulfate of 3-7g, after fully dissolving, then plus
Enter 5-5.5ml hydrochloric acid, be settled to 100ml with water, obtain final product the hydrochloric acid solution of described nickel sulfate.
6. the method for carbon steel surface according to claim 1 no-palladium activating electroless copper is it is characterised in that described cupric plates
The consisting of of liquid: copper sulfate 10g/l, sodium hypophosphite 40g/l, nickel sulfate 1.75-2.00g/l, sodium citrate 30g/l, bigeminy
Pyridine 12mg/l, the ph value containing copper electrolyte is 8.5.
7. the method for carbon steel surface according to claim 1 no-palladium activating electroless copper is it is characterised in that in s2, activate
Temperature is 30-40 DEG C, and total soak time is 25-35min.
8. the method for carbon steel surface according to claim 1 no-palladium activating electroless copper is it is characterised in that in s2, immerse
Soak time in the methanol solution of sodium borohydride is 5-20min, and the soak time in the hydrochloric acid solution of immersion nickel sulfate is 5-
20min.
9. the method for carbon steel surface according to claim 1 no-palladium activating electroless copper is it is characterised in that in s2, described
In the hydrochloric acid solution of nickel sulfate, concentration of nickel sulfate is 50-70g/l.
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