CN115161736A - Plastic autocatalysis electroplating process - Google Patents
Plastic autocatalysis electroplating process Download PDFInfo
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- CN115161736A CN115161736A CN202210903955.2A CN202210903955A CN115161736A CN 115161736 A CN115161736 A CN 115161736A CN 202210903955 A CN202210903955 A CN 202210903955A CN 115161736 A CN115161736 A CN 115161736A
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- 239000004033 plastic Substances 0.000 title claims abstract description 92
- 229920003023 plastic Polymers 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000009713 electroplating Methods 0.000 title claims abstract description 28
- 238000005844 autocatalytic reaction Methods 0.000 title claims description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000007747 plating Methods 0.000 claims abstract description 40
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 35
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 18
- 239000002253 acid Substances 0.000 claims abstract description 14
- 238000005238 degreasing Methods 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 239000011651 chromium Substances 0.000 claims abstract description 7
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 7
- 230000004913 activation Effects 0.000 claims abstract description 3
- 230000003213 activating effect Effects 0.000 claims description 26
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 22
- 238000005406 washing Methods 0.000 claims description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 7
- 239000004327 boric acid Substances 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 7
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 7
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 7
- 239000001509 sodium citrate Substances 0.000 claims description 7
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 230000003472 neutralizing effect Effects 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 5
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims description 5
- TXUICONDJPYNPY-UHFFFAOYSA-N (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate Chemical compound C1CC2CC(=O)C=C(C)C2(C)C2C1C1CCC(OC(=O)CCCCCC)C1(C)CC2 TXUICONDJPYNPY-UHFFFAOYSA-N 0.000 claims description 4
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims description 4
- 239000001119 stannous chloride Substances 0.000 claims description 4
- 235000011150 stannous chloride Nutrition 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 3
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 3
- 235000019801 trisodium phosphate Nutrition 0.000 claims description 3
- 238000007730 finishing process Methods 0.000 claims description 2
- MNCTVKQVIMVWOE-UHFFFAOYSA-N 2-hydrazinylethylhydrazine Chemical compound NNCCNN MNCTVKQVIMVWOE-UHFFFAOYSA-N 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 10
- 239000010410 layer Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000007788 roughening Methods 0.000 description 10
- ODQUDRGGWYOGBJ-UHFFFAOYSA-N NN.C=C Chemical compound NN.C=C ODQUDRGGWYOGBJ-UHFFFAOYSA-N 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/54—Electroplating of non-metallic surfaces
- C25D5/56—Electroplating of non-metallic surfaces of plastics
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses a plastic self-catalytic electroplating process, which relates to the technical field of chemical electroplating processes and comprises degreasing, surface finishing, coarsening, neutralization, presoaking, palladium activation, dispergation, self-catalytic nickel preplating, acid copper electroplating and chromium plating.
Description
Technical Field
The invention relates to the technical field of chemical plating processes, in particular to a plastic autocatalytic plating process.
Background
With the rapid development of industry, the application of plastic electroplating is increasingly wide, and the plastic electroplating product becomes one of important means for the decoration of toilet bowls in plastic products, and the plastic electroplating product has the characteristics of plastics and metals, such as small specific gravity, good corrosion resistance, simple and convenient forming, metallic luster and metallic texture, and the characteristics of electric conduction, magnetic conduction, welding and the like.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the invention provides a plastic autocatalytic plating process, which optimizes the plating process of plastic products and improves the plating forming quality of the plastic products.
The plastic autocatalytic plating process provided by the embodiment of the invention comprises the following steps:
degreasing: cleaning foreign matters on the surface of the plastic product fixed on the hanger by using a cleaning solution;
and (3) finishing: after washing, using a whole solution to make the surface of the plastic product hydrophilic;
coarsening: coarsening treatment is carried out by using coarsening liquid to enable the surface of the plastic product to generate a micropore structure;
neutralizing: cleaning the coarsened plastic product by using a neutralization solution to remove the residual strong acid on the surface of the plastic product;
pre-dipping: performing pre-dipping treatment on the plastic product by adopting a pre-dipping solution;
activating palladium: preparing an activating solution, and performing activating treatment on the plastic product through the activating solution;
and (3) gel releasing: immersing the activated plastic product into a degumming solution for degumming treatment;
self-catalysis nickel preplating: placing the peptized plastic product into an autocatalysis liquid to deposit a conductive layer, wherein in the autocatalysis process, standing is carried out for a period of time, and then low-voltage constant-voltage electroplating is carried out;
acid copper electroplating: carrying out acid washing on the plastic product after the autocatalytic nickel pre-plating is finished, and placing the plastic product after acid washing into copper precipitation solution for copper precipitation treatment;
and (3) chromium plating: and carrying out chromium plating treatment on the plastic product after the treatment.
According to the plastic autocatalytic plating process provided by the embodiment of the invention, the autocatalytic solution contains nickel sulfate, boric acid and sodium citrate, wherein in each liter of autocatalytic solution, the content of nickel sulfate is 55-65 g, the content of boric acid is 20-30 g, and the content of sodium citrate is 95-105 g.
According to the plastic autocatalytic plating process disclosed by the embodiment of the invention, in the autocatalytic nickel pre-plating process, the autocatalytic temperature is 36 +/-0.5 ℃, and the pH of the autocatalytic nickel pre-plating is =8.0 +/-0.5.
According to the plastic autocatalytic plating process disclosed by the embodiment of the invention, the duration of the autocatalytic nickel pre-plating is 8 minutes, wherein the first 4 minutes of standing treatment is carried out without electrifying, and the second 4 minutes of low-voltage constant-voltage plating is carried out, wherein the low voltage is 3V.
According to the plastic self-catalysis electroplating process disclosed by the embodiment of the invention, each liter of the cleaning solution comprises 10g of sodium hydroxide, 20g of sodium carbonate and 35g of trisodium phosphate; in the degreasing process, the temperature of the cleaning solution is 55 +/-1 ℃, and the degreasing time is not less than 4 minutes.
According to the plastic autocatalytic plating process disclosed by the embodiment of the invention, each liter of the coarsening solution contains 400 +/-25 g of sulfuric acid and 400 +/-25 g of chromic acid; in the coarsening process, the temperature of the coarsening liquid is 65 +/-0.5 ℃, and the coarsening time is 10.5 minutes.
According to the plastic autocatalytic plating process provided by the embodiment of the invention, the whole surface solution is 100g/L sulfuric acid, the liquid temperature of the whole surface solution is 50 +/-3 ℃ in the whole surface process, and the whole surface time is not less than 1 minute.
According to the plastic autocatalytic plating process disclosed by the embodiment of the invention, each liter of the neutralization solution contains 30 +/-5 g of hydrochloric acid and 35g of ethylene hydrazine.
According to the plastic autocatalytic plating process provided by the embodiment of the invention, each liter of the activating solution contains 260 +/-5 g of hydrochloric acid, 15PPM of palladium and 3.5g of stannous chloride, and in the palladium activating process, the liquid temperature of the activating solution is 22 +/-1 ℃, and the palladium activating time is 3 minutes.
According to the plastic autocatalytic plating process disclosed by the embodiment of the invention, the pre-soaking solution is 100g/L hydrochloric acid, and the pre-soaking time is 1 minute.
Based on the technical scheme, the embodiment of the invention at least has the following beneficial effects: among the above-mentioned technical scheme, the technological process of plastic product electroplating has been simplified, especially after the debonding, originally need first carry out chemical nickel processing, then carry out the washing again, the pickling, the washing, carry out prefabricated nickel processing again finally, the process is complicated, and waste a large amount of water resources, because there is the time difference between chemical nickel processing and the prefabricated nickel processing, and need circulate each other between each solution tank, lead to easily leading to producing the pock mark and then leading to the bad condition of cohesion to appear between chemical nickel layer and the nickel preplating layer, this application has made an improvement to this part of technology, optimize into autocatalysis nickel preplating treatment, simplified the process, shorten the time cycle that the plastic product electroplates, and the combination between the chemical nickel layer of plastic product after the improvement and the nickel preplating layer is firm, the plastic product quality of final electroplating shaping improves greatly, effectively improve production efficiency.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a flow chart of a plastic electroplating process before improvement of an embodiment of the present invention;
FIG. 2 is a flow chart of the improved plastic electroplating process according to the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
Referring to fig. 2, the plastic autocatalytic plating process of the invention comprises the following steps:
degreasing: cleaning foreign matters on the surface of a plastic product fixed on a hanger by using a cleaning solution, wherein the plastic product is subjected to hanging treatment before degreasing, namely, two ends of the plastic product to be electroplated are connected with a conductive tool or are provided with a hanger special for electroplating, the conductive tools at the two ends or the hanger special for electroplating at the two ends are respectively butted with the anode and the cathode of a power supply to finish preparation for degreasing, wherein each liter of the cleaning solution contains 10g of sodium hydroxide, 20g of sodium carbonate and 35g of trisodium phosphate, the temperature of the cleaning solution is heated to 55 +/-1 ℃ in the degreasing process, the temperature is preferably kept at 55 ℃, and the degreasing time is not less than 4 minutes, so that oil stains or foreign matters on the surface of the plastic product can be removed to the maximum extent, and the surface of the plastic product is ensured to be clean and tidy when the subsequent processes are carried out.
And (3) finishing: and after the degreasing treatment is finished, washing with water, removing the cleaning solution remained on the surface of the plastic product through washing with water, and after the washing with water, using a finishing solution to make the surface of the plastic product hydrophilic, wherein in the embodiment, the finishing solution is 100g/L sulfuric acid, and the liquid temperature of the finishing solution is 50 +/-3 ℃ in the finishing process, wherein the finishing effect is best when the liquid temperature of the finishing solution is 55 ℃, and the finishing time is not less than 1 minute.
Coarsening: roughening treatment is carried out by using roughening solution to enable the surface of a plastic product to generate a microporous structure, wherein the roughening solution contains sulfuric acid and chromic acid, each liter of roughening solution contains 400 +/-25 g of sulfuric acid and 400 +/-25 g of chromic acid, concretely, each liter of roughening solution contains 400g of sulfuric acid and 400g of chromic acid, the temperature of the roughening solution is 65 +/-0.5 ℃, the roughening solution can be maintained at 65 ℃ preferably, and the roughening time is 10.5 minutes, so that sufficient and sufficiently coarse microporous structures can be generated on the surface of the plastic product, and a good anchoring point is provided for a nickel layer of a subsequent autocatalysis nickel preplating process.
Neutralizing: and after the roughening treatment is finished, carrying out recovery treatment, carrying out high-position water washing on the recovered plastic product to clean roughening solution remained on the surface of the plastic product, then adopting neutralizing solution to wash the roughened plastic product to remove residual strong acid on the surface of the plastic product, specifically cleaning residual hexavalent chromium in a microporous structure, wherein the neutralizing solution contains 30 +/-5 g of hydrochloric acid and 35g of ethylene hydrazine, the hydrochloric acid and the ethylene hydrazine can neutralize the hexavalent chromium, carrying out water washing again after the completion, and cleaning the neutralizing solution remained on the surface of the plastic product.
Pre-dipping: after the neutralization, the plastic product is presoaked by using a presoaking solution, wherein the presoaking solution is 100g/L hydrochloric acid, presoaking is carried out at normal temperature for 1 minute, and the presoaking can prevent the treating fluid in the subsequent process from being diluted by the residual water in the micropore structure after the neutralization treatment.
Activating palladium: preparing an activating solution, and activating a plastic product by the activating solution, wherein the activating solution comprises hydrochloric acid, palladium and stannous chloride, each liter of the activated solution prepared comprises 260 +/-5 g of hydrochloric acid, 15PPM of palladium and 3.5g of stannous chloride, the temperature of the activating solution is controlled to be 22 +/-1 ℃ in the palladium activating process, the palladium activating time is maintained for 3 minutes, palladium in the activating solution can be deposited in a microporous structure, preparation is made for a subsequent self-catalytic nickel pre-plating process, and the activating solution is washed by water again after the palladium activation is completed to clean the residual activating solution on the surface of the plastic product.
Degumming: and after the working procedures are finished, immersing the activated plastic product into a degumming solution for degumming treatment, and stripping tin wrapped on the surface of the palladium through the degumming solution.
Self-catalysis nickel preplating: washing the peptized plastic product with water, and then putting the peptized plastic product into an autocatalysis liquid to deposit a conductive layer, wherein in the autocatalysis process, standing for a period of time, and then carrying out low-voltage constant-voltage electroplating, specifically, the autocatalysis liquid contains nickel sulfate, boric acid and sodium citrate, wherein in each liter of autocatalysis liquid, the content of nickel sulfate is 55-65 g, the content of boric acid is 20-30 g, and the content of sodium citrate is 95-105 g, wherein in each liter of autocatalysis liquid, the content of nickel sulfate is preferably 60g, the content of boric acid is preferably 25g, and the content of sodium citrate is preferably 100g, the autocatalysis liquid mixed under the proportion can well form the conductive layer, in the autocatalysis nickel preplating process, the autocatalysis temperature is 36 +/-0.5 ℃, the pH =8.0 +/-0.5 of the autocatalysis nickel prepatalysis is, under the condition, the optimal environmental condition is that the autocatalysis liquid and palladium react, the duration of the autocatalysis nickel prepatalysis is 8 minutes, wherein the first 4 minutes of standing is carried out low-voltage constant-voltage electroplating, and the low-voltage constant-voltage electroplating is 3V. The first 4 minutes do not circular telegram is for autocatalytic deposition one deck conducting layer, if the time of the processing of stewing is too short, conducting layer thickness is easy to puncture inadequately, quiescent time exceeds 4 minutes and can lead to conducting layer stress big, 4 minutes circular telegram 3V later, circular telegram under less current thickens the conducting layer that four minutes produced before, select 3V to be the work window that obtains after many times of tests, voltage is too big, easily punctures the chemical nickel layer, voltage is too little, can not play the effect of thickening.
Acid copper electroplating: and after the acid washing, the plastic product is washed by 10g/L sulfuric acid solution for one minute at room temperature, the conductive layer is activated by the acid washing to prevent the passivation of the conductive layer, and after the acid washing, the plastic product is washed by water, and finally is put into copper precipitation liquid for copper precipitation treatment after the water washing is finished, so that a bright copper coating is deposited on the surface layer of the conductive layer, and the brightness and the toughness are improved.
Chromium plating: and performing chromium plating treatment on the treated plastic product, and then drying to obtain the plastic electroplating product with the characteristics of both plastics and metal.
In the technical scheme, compared with the currently used plastic electroplating process flow shown in fig. 1, the plastic autocatalytic electroplating process disclosed by the invention shown in fig. 2 greatly simplifies the process flow of electroplating of a plastic product, particularly after degumming, chemical nickel treatment is firstly required, then washing, pickling and washing are carried out, and finally prefabricated nickel treatment is carried out, so that the process is complicated, a large amount of water resources are wasted, and due to the fact that time difference exists between the chemical nickel treatment and the prefabricated nickel treatment and mutual circulation is required among various solution pools, pocking marks are easily generated between the chemical nickel layer and the preplated nickel layer, and the poor binding force is caused.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The plastic autocatalysis plating process is characterized by comprising the following steps of:
degreasing: cleaning foreign matters on the surface of the plastic product fixed on the hanger by using a cleaning solution;
and (3) finishing: after washing, using a whole solution to make the surface of the plastic product hydrophilic;
coarsening: coarsening treatment is carried out by using coarsening liquid to enable the surface of the plastic product to generate a micropore structure;
neutralizing: cleaning the roughened plastic product by using a neutralization solution to remove residual strong acid on the surface of the plastic product;
pre-dipping: performing pre-dipping treatment on the plastic product by adopting a pre-dipping solution;
activating palladium: preparing an activating solution, and performing activating treatment on the plastic product through the activating solution;
degumming: immersing the activated plastic product into a degumming solution for degumming treatment;
self-catalytic nickel pre-plating: placing the peptized plastic product into an autocatalysis liquid to deposit a conductive layer, wherein in the autocatalysis process, the plastic product is stood for a period of time and then is subjected to low-voltage constant-voltage electroplating;
acid copper electroplating: carrying out acid washing on the plastic product after the autocatalytic nickel pre-plating is finished, and placing the plastic product after acid washing into copper precipitation solution for copper precipitation treatment;
and (3) chromium plating: and carrying out chromium plating treatment on the plastic product after the treatment.
2. The plastic autocatalytic plating process of claim 1, wherein: the autocatalysis liquid contains nickel sulfate, boric acid and sodium citrate, wherein in each liter of the autocatalysis liquid, the content of the nickel sulfate is 55-65 g, the content of the boric acid is 20-30 g, and the content of the sodium citrate is 95-105 g.
3. The plastic autocatalytic plating process of claim 2, wherein: in the process of the autocatalytic nickel preplating, the autocatalytic temperature is 36 +/-0.5 ℃, and the pH of the autocatalytic nickel preplating is =8.0 +/-0.5.
4. The plastic autocatalytic plating process of claim 3, wherein: the duration of the autocatalytic nickel preplating is 8 minutes, wherein the nickel is kept stand for the first 4 minutes without power supply, and low-voltage constant-voltage electroplating is carried out for the last 4 minutes, wherein the low voltage is 3V.
5. The plastic autocatalytic plating process of claim 1, wherein: the cleaning solution contains 10g of sodium hydroxide, 20g of sodium carbonate and 35g of trisodium phosphate per liter; in the degreasing process, the temperature of the cleaning solution is 55 +/-1 ℃, and the degreasing time is not less than 4 minutes.
6. The plastic autocatalytic plating process of claim 1, wherein: each liter of the coarsening liquid contains 400 plus or minus 25g of sulfuric acid and 400 plus or minus 25g of chromic acid; in the coarsening process, the temperature of the coarsening liquid is 65 +/-0.5 ℃, and the coarsening time is 10.5 minutes.
7. The plastic autocatalytic plating process of claim 1, wherein: the dough finishing solution is 100g/L sulfuric acid, the liquid temperature of the dough finishing solution is 50 +/-3 ℃ in the dough finishing process, and the dough finishing time is not less than 1 minute.
8. The plastic autocatalytic plating process of claim 1, wherein: the neutralization solution contains 30 plus or minus 5g of hydrochloric acid and 35g of ethylene dihydrazine per liter.
9. The plastic autocatalytic plating process of claim 1, wherein: each liter of the activating solution contains 260 +/-5 g of hydrochloric acid, 15PPM of palladium and 3.5g of stannous chloride, and in the process of activating the palladium, the liquid temperature of the activating solution is 22 +/-1 ℃, and the palladium activation time is 3 minutes.
10. The plastic autocatalytic plating process of claim 1, wherein: the presoaking solution is 100g/L hydrochloric acid, and the presoaking time is 1 minute.
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| CN202210903955.2A CN115161736A (en) | 2022-07-28 | 2022-07-28 | Plastic autocatalysis electroplating process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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