CN1010789B - Colour chromium plating - Google Patents
Colour chromium platingInfo
- Publication number
- CN1010789B CN1010789B CN89101219A CN89106223A CN1010789B CN 1010789 B CN1010789 B CN 1010789B CN 89101219 A CN89101219 A CN 89101219A CN 89106223 A CN89106223 A CN 89106223A CN 1010789 B CN1010789 B CN 1010789B
- Authority
- CN
- China
- Prior art keywords
- grams per
- per liter
- acid
- plating bath
- bright
- 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.)
- Expired
Links
- 238000007747 plating Methods 0.000 title claims abstract description 47
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 16
- 239000011651 chromium Substances 0.000 title claims abstract description 16
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 30
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 24
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000009713 electroplating Methods 0.000 claims abstract description 12
- RILZRCJGXSFXNE-UHFFFAOYSA-N 2-[4-(trifluoromethoxy)phenyl]ethanol Chemical compound OCCC1=CC=C(OC(F)(F)F)C=C1 RILZRCJGXSFXNE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000007864 aqueous solution Substances 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910001245 Sb alloy Inorganic materials 0.000 claims description 6
- 239000002140 antimony alloy Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 17
- 238000000576 coating method Methods 0.000 abstract description 17
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 4
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 235000019646 color tone Nutrition 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- -1 haloalkyl sulfonic acid Chemical compound 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- NNBFNNNWANBMTI-UHFFFAOYSA-M brilliant green Chemical compound OS([O-])(=O)=O.C1=CC(N(CC)CC)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](CC)CC)C=C1 NNBFNNNWANBMTI-UHFFFAOYSA-M 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000003016 phosphoric acids Chemical class 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- ZEYKLMDPUOVUCR-UHFFFAOYSA-N 2-chloro-5-(trifluoromethyl)benzenesulfonyl chloride Chemical compound FC(F)(F)C1=CC=C(Cl)C(S(Cl)(=O)=O)=C1 ZEYKLMDPUOVUCR-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000579895 Chlorostilbon Species 0.000 description 1
- 208000006558 Dental Calculus Diseases 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 101001018064 Homo sapiens Lysosomal-trafficking regulator Proteins 0.000 description 1
- 102100033472 Lysosomal-trafficking regulator Human genes 0.000 description 1
- 235000010703 Modiola caroliniana Nutrition 0.000 description 1
- 244000038561 Modiola caroliniana Species 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- VBIXEXWLHSRNKB-UHFFFAOYSA-N ammonium oxalate Chemical compound [NH4+].[NH4+].[O-]C(=O)C([O-])=O VBIXEXWLHSRNKB-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- NHJPVZLSLOHJDM-UHFFFAOYSA-N azane;butanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCC([O-])=O NHJPVZLSLOHJDM-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 229910052876 emerald Inorganic materials 0.000 description 1
- 239000010976 emerald Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- VLAPMBHFAWRUQP-UHFFFAOYSA-L molybdic acid Chemical compound O[Mo](O)(=O)=O VLAPMBHFAWRUQP-UHFFFAOYSA-L 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- XEEVLJKYYUVTRC-UHFFFAOYSA-N oxomalonic acid Chemical compound OC(=O)C(=O)C(O)=O XEEVLJKYYUVTRC-UHFFFAOYSA-N 0.000 description 1
- 235000012736 patent blue V Nutrition 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 229910001495 sodium tetrafluoroborate Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
The present invention belongs to a new method for producing iridescent chromium coating with high corrosion resistance, strong adhesive force and soft, bright, uniform and beautiful colour tone by electroplating on several conductive substrates, especially on the devices plated with bright copper or bright nickel-iron alloy, in the chromium plating aqueous solution containing chromic anhydride, oxalic acid, sulfuric acid and fluoroboric acid, etc. and by means of the current supplied by different waveform power supplies, especially half-wave rectification or pulse power supplies, under the condition of wider operation. The method also has the advantages of low cost, convenient operation, high reproducibility, industrial production and the like.
Description
The present invention is a kind of by electroplating technology, deposits the method for light, pleasing, bright-coloured, uniform iris chromium film on the negative electrode conductive substrate material.
Common Electroplating of Coloured Films technology is as anode with a kind of metal or alloy, with the plating piece is negative electrode, in the coating bath of corrosion resistant material, put into the plating bath of preparing through meticulously, then anode and negative electrode are inserted in the plating bath, connect direct current, through can on the negative electrode plating piece, plating desirable color plating according to different technology conditions after for some time.
United States Patent (USP) 3,418,221 disclose a kind of iris chrome-plating method.This method is an anode with lead or lead alloy, with the conducting base plating piece, as copper, nickel, steel, stainless steel, brass, bronze or zinc after treatment and aluminium are negative electrode, and coating bath is organic synthesis material such as pvc material, are electroplate liquid with the aqueous solution that contains chromic anhydride, sulfuric acid and oxalic acid.
Feed direct current in this plating bath, control certain operational condition, as temperature, current density, electroplating time, the result can obtain light, pleasing iris coating on the plating piece matrix, is blue look during low temperature wherein, is red during high temperature.
This technical qualification harshness, the color instability.
United States Patent (USP) 3,745,097 discloses a kind of iris chrome-plating method.The electroplate liquid of this method consists of the compound that contains 6 valency chromium; At least contain a kind of in the following material as first kind additive, as alkylsulphonic acid, haloalkyl sulfonic acid, alkylphosphonic acid carboxylic acid, and haloalkyl phosphoric acid and its esters; At least contain a kind of in the following material, as contain the carboxylic acid of 1-3 carbon atom, contain the halogenated carboxylic acid and its esters of 1-3 carbon atom as the second class additive; Catalyst anions can comprise vitriol, fluorochemical and compound fluorochemical, silicofluoride for example, fluoroborate, fluoaluminate, fluotitanate and fluozirconate; Inhibitor and/or buffer reagent can be phosphoric acid salt, borate, sulfonate and carboxylate salt etc.Negative electrode available metal or metal, the also organic materials of available treated mistake, plating piece can carry out colour chrome-plating after treatment immediately, also can immerse in the water or immerse just to carry out colour chrome-plating after containing in 0.5～10% the aqueous sulfuric acid.Can plate out irised chromium coating through controlling some condition.
United States Patent (USP) 3,657,079 discloses a kind of iris chrome-plating method.This plating bath is made up of following composition: chromic anhydride, molybdic acid, ammoniacal liquor, the catalyst anions of vitriol, fluorochemical and compound salt thereof, as silicofluoride, fluoroborate, fluoaluminate, fluotitanate and fluozirconate, phosphoric acid salt, borate, sulfonate, the inhibitor of carboxylate salt and/or buffer reagent.Can plate out the iris chromium coating through controlling some condition.
The present invention is intended to develop the chromed novel process of a kind of iris, have very strong sticking power and erosion resistance with acquisition, and color is more bright-coloured, even, pleasing iris chromium rete.
Detailed description of the invention:
According to the present invention, under described below plating bath composition and the various operational condition, can on plating piece, obtain comprising day blue, pink, an emerald green and mauve light, bright-coloured, pleasing and uniform iris chromium rete.
Plating bath of the present invention is made up of the aqueous solution of following composition and concentration: chromic anhydride (CrO
3) 20～300 grams per liters, preferably 45～75 grams per liters; Sulfuric acid (H
2SO
4) 0.01～3.5 grams per liter, preferably 0.05～1.0 grams per liter; Oxalic acid (H
2C
2O
4) 5～110 grams per liters, preferably 12～25 grams per liters; Fluoroboric acid (HBF
4) 0.05～5.0 grams per liter, preferably 0.25～0.45 grams per liter; Cupric nitrate (Cu(NO
3)
2) 0～60 grams per liter, preferably 5～8 grams per liters; Manganse Dioxide (MnO
2) 0～30 grams per liter, preferably 3～5 grams per liters.The also available salt that contains sulfate radical of sulfuric acid wherein, as replacements such as vitriolate of tartar, sodium sulfate, copper sulfate, but effect is not as sulfuric acid.The also available its esters of its mesoxalic acid (comprising the double salt class) or other have the organic or inorganic hydrochlorate of reductibility, as replacements such as ammonium oxalate, ferric ammonium oxalate, Succinic acid ammonium salt, stannic acid ammoniums; But use the effect of oxalic acid best.Also available its esters of fluoroboric acid wherein or compound salt, as replacements such as Sodium tetrafluoroborate, potassium fluoborate, silicofluoric acid, potassium silicofluorides, but effect should fluoroboric acid.Wherein cupric nitrate has the effect of regulating chromium rete tone, and Manganse Dioxide then is used for controlling plating bath sexavalent chrome and chromic ratio, plays a part to stablize plating bath.
The present invention can adopt multiple insoluble material as anode, normally lead, lead antimony alloy, steel plate, stainless steel and graphite etc.But preferably adopt lead or lead antimony alloy.The present invention can be a negative electrode with numerous electro-conductive materials, various alloy pressuring castings as copper, nickel, Rhometal, zinc-iron alloy, steel part, stainless steel, brass, bronze, treated mistake, even glass of handling, plastics, fresh flower vegetation etc. has the material of conductive surface, but with material result the best of coating bright copper, bright nickel or Rhometal.The coating bath that the present invention should make with resistance to oxidation, corrosion resistant material, the coating bath of making as materials such as polyvinyl chloride or potteries.
According to the present invention, employed current density is 2.0～10 amperes/square decimeter, and best scope is 2.5～6.5 amperes/square decimeter; Service temperature is 10～85 ℃, preferably between 20～45 ℃; Electroplating time is 5～420 seconds, and optimum range is 10～120 seconds; Can use multiple electroplating power supply, as the pulse power of direct current, full-wave rectification, half-wave rectification or various waveforms, the preferably pulse power or half-wave rectification power supply.
The concentration of plating bath composition is along with electroplating process constantly carries out the variation that taken place, can be detected definitely by common analytical procedure, and replenishes its composition that is consumed and quantity by above-mentioned composition and optimum concentration range.
The plating piece that has just gone out groove is after washing only, and available heat oven dry, air blast dry up natural airing.The color of plating piece chromium rete can change with the current density that is adopted, electroplating time and service temperature, and wherein especially with the having the greatest impact of current density, electroplating time and temperature effect are less.Along with current density changes from low to high, the color of plating piece chromium rete is successively by sky orchid, pink, emerald green to purplish red change.The smooth finish of plating piece matrix surface has significant effects to brightness, the tone of chromium film, and matrix surface smooth finish is high more, and the chromium rete presents bright, bright-coloured, pleasing more rainbow tone owing to natural reflection of light and refraction.
The plating piece that is plated out according to technical recipe of the present invention and operational condition, has bright, bright-coloured, even, pleasing color, coating adhesion is strong, corrosion-resistant, and can regulate the characteristics such as tone of coating as required with hobby, simultaneously easy and simple to handle, must not pass through preelectrolysis, and because of plating bath has dispersive ability and degree of depth ability preferably, so generally need not use vivid anode.In addition, method of the present invention also has advantages such as with low cost, that circulation ratio is fabulous, the industrial production that can pay.
Further specify the present invention with embodiment below.
Embodiment one:
Use the polyethylene coating bath, with the lead antimony alloy is anode, the iron wire vegetable basket of coating bright nickel is a negative electrode, each composition concentration of aqueous solution of preparation plating bath 120 liter plating bath is in the coating bath of 150 liters: chromic anhydride 60 grams per liters, oxalic acid 17 grams per liters, sulfuric acid 0.5 grams per liter, fluoroboric acid 0.35 grams per liter, cupric nitrate 5 grams per liters, Manganse Dioxide 4 grams per liters.
Control plating bath temperature is 25 ℃, uses general chrome plating equipment, and the control cathode current density is 2.5 amperes/square decimeter, switches on 30 seconds, and plating piece is natural airing after the tap water flushing, and the result is bright, bright-coloured, pleasing sky blue vegetable basket.
Embodiment two, three:
Press plating bath prescription and the processing condition (except that the condition of the listed variation of table one) of embodiment one, the results are shown in table one.
Embodiment four:
Sofa wheel carrier ironware with the coating bright Rhometal is a negative electrode, the concentration and the operational condition of each composition of plating bath are respectively: chromic anhydride 50 grams per liters, sulfuric acid 0.1 grams per liter, oxalic acid 15 grams per liters, fluoroboric acid 0.35 grams per liter, Manganse Dioxide 5 grams per liters, being made into the 10 liter aqueous solution in the polyvinyl chloride coating bath, is anode with lead antimony alloy, under 35 ℃ temperature, adopt the half-wave rectification power supply, control current density is 5.5 amperes/square decimeter, electroplates 45 seconds, and ironware goes out groove after the water flushing, dry up with electric fan then, the result obtains light, bright-coloured, pleasing emerald goods.
Embodiment five:
Tourist souvenir with coating bright nickel is a negative electrode, and lead antimony alloy is an anode, prepares 5 liter plating bath, and its component and concentration and operational condition are respectively: chromic anhydride 70 grams per liters, sulfuric acid 0.3 grams per liter, oxalic acid 20 grams per liters, fluoroboric acid 0.25 grams per liter, cupric nitrate 5 grams per liters.Under 25 ℃ temperature, adopt full-wave rectifier power supply, control current density is 4.5 amperes/square decimeter, electroplates 60 seconds, the sample after water washing blots by filter is low, then gets soft, bright-coloured, the pleasing pink sample of tone.
Embodiment six
Identical with embodiment five, be 6.5 amperes/square decimeter but change current density, the result obtains bright-coloured, bright, even, the pleasing emerald green plating sample of tone.
Table one
Current density,
Embodiment plating piece surface type result
Ampere/square decimeter
Two bright copper substrates, 4.5 lights, bright-coloured, pleasing, pink
Three bright nickel iron alloy substrates, 6 lights, bright-coloured, pleasing, emerald green
Claims (4)
1, a kind of negative electrode is electroplated the method for iris chromium rete, it is to contain chromic anhydride, in the aqueous solution plating bath of sulfuric acid and oxalic acid, with copper, electro-conductive material such as nickel or Rhometal is a negative electrode, lead or lead antimony alloy are anode, direct current by certain current density, at a certain temperature, according to must thickness control plating time, and obtain iris chromium rete, feature of the present invention is that said plating bath also contains fluoroboric acid, each components and concentration of said plating bath is a chromic anhydride 20-300 grams per liter, sulfuric acid 0.01～0.35 grams per liter, oxalic acid 5-110 grams per liter, fluoroboric acid 0.05～5.0 grams per liter, said method is the current density at 2.0～10 amperes/square decimeter, carries out under the condition of the electroplating time of 15～85 ℃ temperature and 5-420 second, and said method adopts the pulse power of half-wave or full-wave rectification or various waveforms.
2, according to the method for claim 1, it is characterized in that each components and concentration of said plating bath is: chromic anhydride 45～75 grams per liters, sulfuric acid 0.05-1.0 grams per liter, oxalic acid 12-25 grams per liter, fluoroboric acid 0.25～0.45 grams per liter, said method is the current density at 2.5～6.5 amperes/square decimeter, and 20～40 ℃ of temperature are carried out under 10～120 seconds the condition of electroplating time.
3, according to the method for claim 1, it is characterized in that said plating bath also contains cupric nitrate and/or Manganse Dioxide, cupric nitrate concentration is the 5-8 grams per liter, the concentration of Manganse Dioxide is the 3-5 grams per liter.
4,, it is characterized in that electroplating power supply is the pulse power or half-wave rectification power supply according to claim 1 and 3 said methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89101219A CN1010789B (en) | 1989-07-23 | 1989-07-23 | Colour chromium plating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89101219A CN1010789B (en) | 1989-07-23 | 1989-07-23 | Colour chromium plating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1039628A CN1039628A (en) | 1990-02-14 |
| CN1010789B true CN1010789B (en) | 1990-12-12 |
Family
ID=4856681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89101219A Expired CN1010789B (en) | 1989-07-23 | 1989-07-23 | Colour chromium plating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010789B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464654C (en) * | 2004-03-11 | 2009-03-04 | 朱国光 | Method for making aluminium zipper with colorful galvanized coating |
| US7780840B2 (en) * | 2008-10-30 | 2010-08-24 | Trevor Pearson | Process for plating chromium from a trivalent chromium plating bath |
| CN103255455B (en) * | 2013-05-31 | 2016-06-22 | 东北大学 | A kind of at metal material surface pulse frosting treatment method and device |
-
1989
- 1989-07-23 CN CN89101219A patent/CN1010789B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1039628A (en) | 1990-02-14 |
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