CN102242384A - Process for plating trivalent chromium on surfaces of plastic - Google Patents

Process for plating trivalent chromium on surfaces of plastic Download PDF

Info

Publication number
CN102242384A
CN102242384A CN2010101799916A CN201010179991A CN102242384A CN 102242384 A CN102242384 A CN 102242384A CN 2010101799916 A CN2010101799916 A CN 2010101799916A CN 201010179991 A CN201010179991 A CN 201010179991A CN 102242384 A CN102242384 A CN 102242384A
Authority
CN
China
Prior art keywords
grams per
per liter
mixing solutions
carry
concentration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010101799916A
Other languages
Chinese (zh)
Inventor
陶云峰
仇士学
黄修康
陈建敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENHAI SPECIAL PLATING CO Ltd NANTONG CITY
Original Assignee
SHENHAI SPECIAL PLATING CO Ltd NANTONG CITY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENHAI SPECIAL PLATING CO Ltd NANTONG CITY filed Critical SHENHAI SPECIAL PLATING CO Ltd NANTONG CITY
Priority to CN2010101799916A priority Critical patent/CN102242384A/en
Publication of CN102242384A publication Critical patent/CN102242384A/en
Pending legal-status Critical Current

Links

Abstract

The invention relates to a process for plating trivalent chromium on surfaces of plastic. The process is characterized by treating the surfaces of a plastic processing piece through the following steps: surface oil removal, surface micro-roughing treatment, reduction treatment, colloidal palladium activation, dispergation treatment, chemical nickel plating, watt nickel plating, bright copper plating, bright nickel plating, trivalent chromium plating, testing, packaging and storage. The process provided by the invention can be used for plating decorative chromium and nickel on the surfaces of plastic and rubber parts in communication, IT (information technology), digital, automobile and other industries, has the advantages of scientific and rational plating liquid and process, strong adhesion of a plating layer, uniform distribution of the plating layer, excellent quality of the plating layer and no use of extremely toxic and carcinogenic hexavalent chromium, and can be used for significantly reducing the environmental pollution.

Description

A kind of plastic cement electroplating surface trivalent chromium technology
Technical field
The present invention relates to a kind of in the chromic processing method of plastic cement electroplating surface.
Background technology
At the component of communication, IT, number, automobile and other industries, much be to make, and constitute at its surface plating decorations chromium, nickel of plastic material.Prior art is that its weak point is the coating surface lack of homogeneity at plastic cement surface plating decorations sexavalent chrome, the bonding force weakness of plating decorations layer and plastic material, and coating easily peels off separation, adds that sexavalent chrome has high carcinogenic, very harmful to environmental protection and HUMAN HEALTH.
Summary of the invention
For overcome have now plastic material electroplate sexavalent chrome coating skewness all, bonding force is poor, not enough greatly to environmental protection and human health damage, the invention provides a kind of plastic cement electroplating surface trivalent chromium technology, it is evenly distributed at overlay coating, firm binding force, improvement significantly alleviates human body is endangered the pollution of environment.
The present invention realizes that the technical scheme that its purpose is taked is: a kind of in plastic cement electroplating surface trivalent chromium technology, it is characterized in that following process steps is carried out on plastic material work piece surface to be handled:
(1) removes grease, at sodium hydroxide NaOH, yellow soda ash Na 2CO 3With tertiary sodium phosphate Na 3PO 4Clean in the mixing solutions, the components and concentration of this mixing solutions is NaOH 10-50 grams per liter, Na 2CO 310-50 grams per liter, Na 3PO 4The 200-450 grams per liter;
(2) surface microscopic roughening treatment is at chromic trioxide CrO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the constituent concentration of this solution is CrO 340-80 grams per liter, Na 3PO 4The 20-40 grams per liter;
(3) processing is reduced on the surface, at S-WAT Na 2SO 3Carry out in the solution, the concentration of this solution is Na 2SO 3The 20-50 grams per liter;
(4) surperficial colloidal palladium activation treatment adopts Palladous chloride PdCl 2With hydrochloric acid HCl mixing solutions, the components and concentration of this mixing solutions is PdCl 20.5-1 grams per liter, the HCl0.3-1 grams per liter;
(5) surperficial dispergation is handled, at sulfuric acid H 2SO 4Carry out sulfuric acid H in the solution 2SO 4The concentration of solution is the 150-350 grams per liter;
(6) plating chemical nickel is at aqueous sulfuric acid nickel SO 47H 2O, inferior sodium phosphate Na 2PO 3With boric acid H 3BO 3Carry out in the mixing solutions, its constituent concentration is NiSO 47H 2O 18-45 grams per liter, Na 2PO 3The 5-22 grams per liter, H 3BO 3The 25-50 grams per liter;
(7) plating watt nickel is at aqueous sulfuric acid nickel SO 47H2O, moisture nickelous chloride NiCl 26H 2O and boric acid H 3BO 3Carry out in the mixing solutions, its constituent concentration is NiSO 47H 2O 100-250 grams per liter, NiCl 26H 2O 60-120 grams per liter, H 3BO 3The 50-75 grams per liter;
(8) plate bright copper, at copper sulfate CuSO 4With sulfuric acid H 2SO 4Mixed solution carries out, and this mixing solutions composition, concentration are CuSO 45H 2O 60-180 grams per liter, H 2SO 4The 50-150 grams per liter;
(9) bright nickel plating is at aqueous sulfuric acid nickel SO 47H 2O, moisture nickelous chloride NiCL 26H 2O and boric acid H 3BO 3Carry out in the mixing solutions, this mixing solutions is identical with aforementioned the 6th road technology;
(10) plating trivalent chromium is at chromic salt chromium sulphate Cr 2(SO 4) 3, stablizer Dioctyl Sodium Sulfosuccinate C 20H 37NaO 7S, wetting agent sodium dodecyl C 12H 25NaO 4S boric acid H 3BO 3Carry out in the mixing solutions, the components and concentration of this mixing solutions is: Cr 2(SO 4) 32-20 grams per liter, C 20H 37NaO 7S 40-80 milliliter/liter, H 3BO 310-25 grams per liter, C 12H 25NaO 4The S1-5 grams per liter.
(11) inspection after construction packing warehouse-in.
The positively effect of technology of the present invention is through removing processing steps such as surperficial grease, microcosmic alligatoring, reduction processing, the activation of surperficial colloidal palladium and dispergation processing on plastic cement work piece surface, for laying a solid foundation in its electroplating surface decorative chromium and nickel, the plating bath and the craft science of preparation are reasonable, so coating and work piece surface bonding power are firm, coating is evenly distributed, make ultimate final product quality excellence, improved pollution level, had outstanding substantive distinguishing features and obvious improvement compared with the prior art environment.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a process flow sheet of the present invention.
In Fig. 1, the concise and to the point name of each technical process is called: 1. remove surperficial grease, and 2. surface microscopic alligatoring, 3. surface reduction is handled, 4. surperficial colloidal palladium activation, 5. surperficial dispergation is handled, 6. plating chemical nickel, 7. plating watt nickel, 8. plate bright copper, 9. trivalent chromium is 10. plated in bright nickel plating, 11. inspection after constructions packing warehouse-in.
Embodiment
A kind of plastic cement electroplating surface trivalent chromium technology is characterized in that following process steps is carried out on plastic material work piece surface to be handled:
(1) remove surperficial grease, the composition of the mixing solutions of use, concentration (grams per liter) are:
Embodiment 1 2 3 4 5
NaOH 20 35 25 40 48
Na 2CO 3 15 25 16 42 36
Na 3PO 4 200 220 380 215 380
(2) surface microscopic roughening treatment, use the constituent concentration (grams per liter) of mixing solutions to be:
Embodiment 1 2 3 4 5
CrO 3 80 43 68 56 73
Na 3PO 4 20 36 27 32 29
(3) surface reduction is handled, and uses the constituent concentration (grams per liter) of solution to be:
Embodiment 1 2 3 4 5
Na 2SO 3 50 31 27 46 26
(4) surperficial colloidal palladium activation, use the constituent concentration (grams per liter) of mixing solutions to be:
Embodiment 1 2 3 4 5
PdCl 2 0.5 1 0.8 0.6 0.9
HCl 1 0.3 0.7 0.6 0.5
(5) surperficial dispergation is handled, and the solution composition concentration (grams per liter) of use is:
Embodiment 1 2 3 4 5
H 2SO 4 350 220 180 290 310
(6) surface plating chemical nickel, the solution composition concentration (grams per liter) of use is:
Embodiment 1 2 3 4 5
NiSO 4·7H 2O 45 20 38 26 37
Na 2PO 3 5 20 19 13 8
H 3BO 3 26 49 31 28 34
(7) surface plating watt nickel, the solution composition concentration (grams per liter) of use is:
Embodiment 1 2 3 4 5
NiSO 4·7H 2O 198 249 107 136 225
NiCl 2·6H 2O 119 61 86 108 74
H 3BO 3 74 52 68 71 63
(8) the bright copper of surface plating, the solution composition concentration (grams per liter) of use is:
Embodiment 1 2 3 4 5
CuSO 4·5H 2O 176 68 164 135 83
H 2SO 4 143 83 72 140 96
(9) surface plating watt nickel, the solution composition concentration (grams per liter) of use is:
Embodiment 1 2 3 4 5
NiSO 4·7H 2O 45 20 38 26 37
Na 2PO 3 5 20 19 13 8
H 3BO 3 26 49 31 28 34
(10) plating trivalent chromium, the solution composition concentration (grams per liter) of use is:
Embodiment 1 2 3 4 5
Cr 2(SO 4) 3 20 16 2 8 12
C 2OH 37NaO 7S 43 80 58 73 64
H 3BO 3 25 21 10 17 22
Sodium dodecyl 2 3 4 1 5
(10) examination and test of products packing warehouse-in
For saving space, the numeral that 5 kinds of above-mentioned each embodiment of embodiment should get reference numeral is as the criterion.

Claims (3)

1. plastic cement electroplating surface trivalent chromium technology is characterized in that the plastic material work piece is handled through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, chromic trioxide CrO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration content of each solution is in this mixing solutions: NaOH 10-50 grams per liter, Na 2CO 3The 10-50 grams per liter, Na 3PO 4The 200-450 grams per liter.
(2) surface microscopic roughening treatment is at chromic trioxide CrO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, ingredient, concentration are in this mixing solutions: CrO 3The 40-80 grams per liter, Na 3PO 4The 20-40 grams per liter.
(3) surface reduction is handled, at S-WAT Na 2SO 3Carry out in the solution, its concentration is the 20-50 grams per liter.
(4) surperficial colloidal palladium activation treatment is at Palladous chloride PdCl 2With carry out in the hydrochloric acid HCl mixing solutions, its composition, concentration are PdCl 20.5-1 grams per liter, the HCl0.3-1 grams per liter.
(5) surperficial dispergation is handled, at sulfuric acid H 2SO 4Carry out in the solution, its concentration is the 150-350 grams per liter.
(6) surface plating chemical nickel is at single nickel salt NiSO 47H2O, inferior sodium phosphate Na 2PO 3With boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are NiSO 47H 2O18-45 grams per liter, Na 2PO 35-22 grams per liter, H 3BO 3The 25-50 grams per liter.
(7) surface plating watt nickel is at aqueous sulfuric acid nickel SO 47H 2O, moisture nickelous chloride NiCl 26H 2O and boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are NiSO 47H 2O 100-250 grams per liter, NiCl 26H 2O 60-120 grams per liter, H 3BO 3The 50-75 grams per liter.
(8) the bright copper of surface plating is at copper sulfate CuSO 4With sulfuric acid H 2SO 4Carry out in the mixing solutions, its composition, concentration are: CuSO 4The 60-180 grams per liter, H 2SO 4The 50-150 grams per liter.
(9) surperficial bright nickel plating is at single nickel salt, NiSO 47H 2O, nickelous chloride NiCL 26H 2O and boric acid H 3BO 3Carry out in the mixing solutions, this mixing solutions is identical with above-mentioned (7) point.
(10) surface plating trivalent chromium is at chromic salt chromium sulphate Cr 2(SO 4) 3, stablizer Dioctyl Sodium Sulfosuccinate C 20H 37NaO 7S, wetting agent sodium dodecyl C 12H 25NaO 4S and boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are Cr 2(SO 3) 3The 2-20 grams per liter, C 20H 37NaO 7S 40-80 grams per liter, C 12H 25NaO 4S1-5 grams per liter, H 3BO 3The 10-25 grams per liter.
(11) examination and test of products packing warehouse-in.
2. a kind of plastic cement electroplating surface trivalent chromium technology according to claim 1 is characterized in that plastic material work piece surface is handled through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, chromic trioxide CrO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration content of each solution is in this mixing solutions: NaOH 10-35 grams per liter, Na 2CO 3The 10-35 grams per liter, Na 3PO 4The 200-350 grams per liter.
(2) surface microscopic roughening treatment is at chromic trioxide CrO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, ingredient, concentration are in this mixing solutions: CrO 3The 50-80 grams per liter, Na 3PO 4The 20-35 grams per liter.
(3) surface reduction is handled, at S-WAT Na 2SO 3Carry out in the solution, its concentration is the 22-38 grams per liter.
(4) surperficial colloidal palladium activation treatment is at Palladous chloride PdCl 2With carry out in the hydrochloric acid HCl mixing solutions, its composition, concentration are PdCl 20.5-0.8 grams per liter, the HCl0.35-0.85 grams per liter.
(5) surperficial dispergation is handled, and carries out in sulphuric acid soln, and its concentration is the 150-250 grams per liter.
(6) surface plating chemical nickel is at single nickel salt NiSO 47H 2O, inferior sodium phosphate Na 2PO 3With boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are NiSO 47H 2O 20-35 grams per liter, Na 2PO 38-21 grams per liter, H 3BO 3The 25-38 grams per liter.
(7) surface plating watt nickel is at aqueous sulfuric acid nickel SO 47H 2O, moisture nickelous chloride NiCl 26H 2O and boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are NiSO 47H 2O 110-230 grams per liter, NiCl 26H 2O 65-105 grams per liter, H 3BO 3The 55-70 grams per liter.
(8) the bright copper of surface plating is at copper sulfate CuSO 4With sulfuric acid H 2SO 4Carry out in the mixing solutions, its composition, concentration are: CuSO 4The 70-160 grams per liter, H 2SO 4The 80-145 grams per liter.
(9) surface plating watt nickel is at single nickel salt, NiSO 47H 2O, nickelous chloride NiCl 26H 2O and boric acid H 3BO 3Carry out in the mixing solutions, this mixing solutions is identical with above-mentioned (6) point.
(10) surface plating trivalent chromium is at chromic salt chromium sulphate Cr 2(SO 4) 3, stablizer Dioctyl Sodium Sulfosuccinate C 20H 37NaO 7S, wetting agent sodium dodecyl C 12H 25NaO 4S and boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are Cr 2(SO 3) 3The 2-17 grams per liter, C 20H 37NaO 7S 45-70 grams per liter, C 12H 25NaO 4S1-4 grams per liter, H 3BO 3The 10-22 grams per liter.
(11) examination and test of products packing warehouse-in.
3. a kind of plastic cement electroplating surface trivalent chromium technology according to claim 1 is characterized in that plastic material work piece surface is handled through following process steps:
(1) removes surperficial grease, at sodium hydroxide NaOH, chromic trioxide CrO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, the concentration content of each solution is in this mixing solutions: NaOH 10-25 grams per liter, Na 2CO 3The 10-25 grams per liter, Na 3PO 4The 200-250 grams per liter.
(2) surface microscopic roughening treatment is at chromic trioxide CrO 3With tertiary sodium phosphate Na 3PO 4Carry out in the mixing solutions, ingredient, concentration are in this mixing solutions: CrO 3The 65-80 grams per liter, Na 3PO 4The 25-28 grams per liter.
(3) surface reduction is handled, at S-WAT Na 2SO 3Carry out in the solution, its concentration is the 25-35 grams per liter.
(4) surperficial colloidal palladium activation treatment is at Palladous chloride PdCl 2With carry out in the hydrochloric acid HCl mixing solutions, its composition, concentration are PdCl 20.65-0.75 grams per liter, the HCl0.35-0.55 grams per liter.
(5) surperficial dispergation is handled, at sulfuric acid H 2SO 4Carry out in the solution, its concentration is the 180-220 grams per liter.
(6) surface plating chemical nickel is at single nickel salt NiSO 47H 2O, inferior sodium phosphate Na 2PO 3With boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are NiSO 47H 2O 23-32 grams per liter, Na 2PO 311-16 grams per liter, H 3BO 3The 28-32 grams per liter.
(7) surface plating watt nickel is at aqueous sulfuric acid nickel SO 47H 2O, moisture nickelous chloride NiCl 26H 2O and boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are NiSO 47H 2O 140-180 grams per liter, NiCl 26H 2O 70-93 grams per liter, H 3BO 3The 62-68 grams per liter.
(8) the bright copper of surface plating is at copper sulfate CuSO 4With sulfuric acid H 2SO 4Carry out in the mixing solutions, its composition, concentration are: CuSO 4The 75-135 grams per liter, H 2SO 4The 90-125 grams per liter.
(9) surface plating watt nickel is at single nickel salt NiSO 47H 2O, nickelous chloride NiCl 26H 2O and boric acid H 3BO 3Carry out in the mixing solutions, this mixing solutions is identical with above-mentioned (7) point.
(10) surface plating trivalent chromium is at chromic salt chromium sulphate Cr 2(SO 4) 3, stablizer Dioctyl Sodium Sulfosuccinate C 20H 37NaO 7S, wetting agent sodium dodecyl C 12H 25NaO 4S and boric acid H 3BO 3Carry out in the mixing solutions, its composition, concentration are Cr 2(SO 3) 3The 5-13 grams per liter, C 20H 37NaO 7S 46-57 grams per liter, C 12H 25NaO 4S1.5-3.2 grams per liter, H 3BO 3The 14-21 grams per liter.
(11) examination and test of products packing warehouse-in.
CN2010101799916A 2010-05-16 2010-05-16 Process for plating trivalent chromium on surfaces of plastic Pending CN102242384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010101799916A CN102242384A (en) 2010-05-16 2010-05-16 Process for plating trivalent chromium on surfaces of plastic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010101799916A CN102242384A (en) 2010-05-16 2010-05-16 Process for plating trivalent chromium on surfaces of plastic

Publications (1)

Publication Number Publication Date
CN102242384A true CN102242384A (en) 2011-11-16

Family

ID=44960618

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010101799916A Pending CN102242384A (en) 2010-05-16 2010-05-16 Process for plating trivalent chromium on surfaces of plastic

Country Status (1)

Country Link
CN (1) CN102242384A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102936742A (en) * 2012-11-07 2013-02-20 嘉兴敏惠汽车零部件有限公司 Method for electroplating black trivalent chromium on surface of plastic for vehicle decorating strip
CN102943292A (en) * 2012-11-07 2013-02-27 嘉兴敏惠汽车零部件有限公司 Method for electroplating micro-crack nickel on plastic surface
CN103290447A (en) * 2013-05-30 2013-09-11 延康汽车零部件如皋有限公司 Pre-copper plating second-order up-flowing process
CN103590082A (en) * 2013-12-03 2014-02-19 厦门建霖工业有限公司 Phosphor-less hexavalent chromium-less environmentally-friendly plastic electroplating method
CN103834944A (en) * 2014-03-12 2014-06-04 延康汽车零部件如皋有限公司 Method for preventing electrochromism product from skip plating and hard spots
CN105543915A (en) * 2015-12-25 2016-05-04 东莞星晖真空镀膜塑胶制品有限公司 Imitation gold electroplating process for plastic surface
CN105839159A (en) * 2016-05-23 2016-08-10 无锡市嘉邦电力管道厂 Polyvinyl plastic electroplating process
CN107488854A (en) * 2017-08-25 2017-12-19 长春长光宇航复合材料有限公司 A kind of cyanate resin base composite material optical mirror plane and preparation method thereof
CN107904636A (en) * 2017-11-24 2018-04-13 广东埃德伟控汽车部件有限公司 A kind of acid double-colored material plating solution glue and preparation method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102936742A (en) * 2012-11-07 2013-02-20 嘉兴敏惠汽车零部件有限公司 Method for electroplating black trivalent chromium on surface of plastic for vehicle decorating strip
CN102943292A (en) * 2012-11-07 2013-02-27 嘉兴敏惠汽车零部件有限公司 Method for electroplating micro-crack nickel on plastic surface
CN102943292B (en) * 2012-11-07 2016-06-08 嘉兴敏惠汽车零部件有限公司 A kind of method of plastic surface plating micro-crack nickel
CN102936742B (en) * 2012-11-07 2015-07-15 嘉兴敏惠汽车零部件有限公司 Method for electroplating black trivalent chromium on surface of plastic for vehicle decorating strip
CN103290447A (en) * 2013-05-30 2013-09-11 延康汽车零部件如皋有限公司 Pre-copper plating second-order up-flowing process
CN103590082A (en) * 2013-12-03 2014-02-19 厦门建霖工业有限公司 Phosphor-less hexavalent chromium-less environmentally-friendly plastic electroplating method
CN103590082B (en) * 2013-12-03 2016-03-02 厦门建霖工业有限公司 A kind of without phosphorus, non-hexavalent chromium environment friendly shape glue electro-plating method
CN103834944A (en) * 2014-03-12 2014-06-04 延康汽车零部件如皋有限公司 Method for preventing electrochromism product from skip plating and hard spots
CN105543915A (en) * 2015-12-25 2016-05-04 东莞星晖真空镀膜塑胶制品有限公司 Imitation gold electroplating process for plastic surface
CN105839159A (en) * 2016-05-23 2016-08-10 无锡市嘉邦电力管道厂 Polyvinyl plastic electroplating process
CN105839159B (en) * 2016-05-23 2018-08-03 中山恒亿电镀有限公司 A kind of vinyon electroplating technology
CN107488854A (en) * 2017-08-25 2017-12-19 长春长光宇航复合材料有限公司 A kind of cyanate resin base composite material optical mirror plane and preparation method thereof
CN107904636A (en) * 2017-11-24 2018-04-13 广东埃德伟控汽车部件有限公司 A kind of acid double-colored material plating solution glue and preparation method thereof

Similar Documents

Publication Publication Date Title
CN102242384A (en) Process for plating trivalent chromium on surfaces of plastic
CN102605398B (en) Method for treating surface of faucet
CN104674314A (en) Cyanide-free and nickel-free electroplating method for copper-tin alloy
CN103451693B (en) A kind of alkaline zinc-nickel alloy pulse plating method of nickel stable content
CN107059091B (en) A kind of aluminium alloy corrosion-resistant surface processing method
CN107313078A (en) A kind of trivalent chromium plating solution and preparation method thereof
CN102703935A (en) Novel electroplating solution for microcrack nickel electroplating and plastic part electroplating technology adopting electroplating solution
CN105112970A (en) Automobile label plastic electroplating process
CN103898574A (en) Electroplating Fe-Ni alloy magnetic shielding material and preparation method thereof
CN102115899A (en) Tin-nickel alloy plating solution used for plating neodymium iron boron permanent magnet material and method for plating neodymium iron boron permanent magnet material by adopting same
CN104250813A (en) Method for preparing super-hydrophobic self-cleaned corrosion-resisting surface of magnesium alloy
CN104328432A (en) Plastic substrate electroplating method
CN103046094A (en) Composite chromium electroplating method on metal surface
CN203427405U (en) Plating layer structure with plastic electroplating
CN1421547A (en) Electroplating of Zn-Ni alloy onto surface of Nd-Fe-B permanent magnet
CN205556812U (en) Compound plating layer structure of black chromium is electroplated to high corrosion resistance trivalent chromium
CN104711649B (en) Stainless steel surface copper-plating technology
CN103266321A (en) Preparation method of plastic-based copper-chromium double-layered environmental-friendly wear-resisting electronic hardware fitting
CN103849908B (en) A kind of trivalent chromium bath and in trivalent chromium bath the method for electrodeposited chromium coating
CN208395290U (en) A kind of corrosion resistant coating structure
CN107604403A (en) A kind of stable electric plating method of frosting
CN103215624A (en) Acidic cyanide-free copper-tin alloy electroplating bath
CN203307454U (en) Environment-friendly and wear-resistant plastic-based electronic hardware fitting with copper and chromium layers
CN208236822U (en) Improve the automobile-used fastener constructions of antiseptic property
CN204174299U (en) A kind of insoluble anode device for Electrodeposition of Zn-ni Alloy In Alkaline Bath

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20111116