EP2635724A1 - Procédé de dépôt de chrome dur à partir d'électrolytes exempts de cr(vi) - Google Patents
Procédé de dépôt de chrome dur à partir d'électrolytes exempts de cr(vi)Info
- Publication number
- EP2635724A1 EP2635724A1 EP11779627.6A EP11779627A EP2635724A1 EP 2635724 A1 EP2635724 A1 EP 2635724A1 EP 11779627 A EP11779627 A EP 11779627A EP 2635724 A1 EP2635724 A1 EP 2635724A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- iii
- chromium
- takes place
- solution
- preparation
- 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.)
- Granted
Links
- 239000011651 chromium Substances 0.000 title claims abstract description 96
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 24
- 238000000151 deposition Methods 0.000 title claims abstract description 18
- 239000003792 electrolyte Substances 0.000 title description 23
- 150000004820 halides Chemical class 0.000 claims abstract description 21
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 19
- 230000008021 deposition Effects 0.000 claims abstract description 17
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 17
- 150000002367 halogens Chemical class 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000004070 electrodeposition Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 30
- 229940021013 electrolyte solution Drugs 0.000 claims description 17
- 238000004090 dissolution Methods 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 14
- 239000008139 complexing agent Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000006722 reduction reaction Methods 0.000 claims description 7
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 150000001649 bromium compounds Chemical class 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052794 bromium Inorganic materials 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 150000004694 iodide salts Chemical class 0.000 claims description 4
- 150000003856 quaternary ammonium compounds Chemical group 0.000 claims description 4
- 238000011066 ex-situ storage Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910000497 Amalgam Inorganic materials 0.000 claims description 2
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 2
- 239000000788 chromium alloy Substances 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 229910052745 lead Inorganic materials 0.000 claims description 2
- 229910052753 mercury Inorganic materials 0.000 claims description 2
- 230000006798 recombination Effects 0.000 claims description 2
- 238000005215 recombination Methods 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 claims description 2
- 238000011069 regeneration method Methods 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims 1
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 abstract 1
- 235000019589 hardness Nutrition 0.000 description 13
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229940049964 oleate Drugs 0.000 description 3
- -1 oleate ion Chemical class 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- ACQZVWGQFXXTIX-UHFFFAOYSA-M 4-ethyl-4-methylmorpholin-4-ium;bromide Chemical compound [Br-].CC[N+]1(C)CCOCC1 ACQZVWGQFXXTIX-UHFFFAOYSA-M 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009918 complex formation Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- UNDWHSZYMRZIOB-UHFFFAOYSA-N 4-ethylmorpholin-4-ium;bromide Chemical compound Br.CCN1CCOCC1 UNDWHSZYMRZIOB-UHFFFAOYSA-N 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000003868 ammonium compounds Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 description 1
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- DCKSLNCVZHTEJK-UHFFFAOYSA-N formic acid;oxalic acid Chemical compound OC=O.OC(=O)C(O)=O DCKSLNCVZHTEJK-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 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
- C25D3/06—Electroplating: Baths therefor from solutions of chromium from solutions of trivalent chromium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/10—Electrodes, e.g. composition, counter electrode
-
- 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
- C25D3/10—Electroplating: Baths therefor from solutions of chromium characterised by the organic bath constituents used
Definitions
- the invention relates to a process for the electrodeposition of chromium, preferably hard chromium, on a substrate made of an electrolyte solution containing Cr (II), Cr (III) or mixtures thereof and halides.
- Hard chrome is produced as a wear and corrosion protection according to the current state of the art in high layer thicknesses almost exclusively of chromic acid electrolyte. Depending on the deposition conditions, hardnesses between 800 and 1150 HVo . i achieved. A further increase in hardness can be achieved with conventional hard chrome only by post-treatment. Because of the carcinogenic potential of Cr (VI) compounds and the resulting limitations, such as Regulation (EC) No 1907/2006 (RE ACH Regulation), increased efforts are underway not only for products but also for manufacturing processes Cr ( VI) -free. Particularly affected are the aerospace and automotive industries and their suppliers.
- GB 1 488 381 and GB 1 144 913 envisage the use of dimethylformamide (DMF), US 4,107,004 the use of hypophosphite.
- DMF dimethylformamide
- US 4,107,004 the use of hypophosphite.
- the deposition of thin Cr layers for decorative purposes is often made of formate oxalate or maleate-based Cr (III) electrolytes with glycine as an additive.
- US Pat. No. 4,804,446 discloses an electrolyte based on CrCl 3 with additions of boric acid (as buffer), KBr (as conducting salt) and various organic acids (formic acid, glycolic acid and citric acid) or their Na or K salts.
- WO 2007/115030 A1 describes the chromium deposition from trivalent chromium sulfate / chloride electrolytes.
- the published US patent application. 2008/0169199 Al describes the use of a trivalent chromium electrolyte based on sulfate and / or chloride with various bromides as additives.
- the main disadvantages of the methods described so far compared to the deposition of hard chromium from conventional hexavalent electrolytes are usually due to a low maximum layer thickness d (usually d ⁇ 15 ⁇ ) as well as deficient layer quality or adhesion, etc.
- Sulfate-based electrolytes frequently have the disadvantage of formation of Cr (VI) as a side reaction at the anode, which is undesirable for Cr (III) electrolytes; the disadvantage of halide-based electrolytes is the anodic reaction of the electrolyte under halogen evolution when using dimensionally stable electrodes.
- Object of the present invention is therefore to provide a method of the type mentioned, in which these disadvantages are avoided.
- a method is to be provided in which a chromium layer is deposited on a substrate, which has good adhesion and very high hardness and no upper limit for the achievable layer thicknesses.
- the chrome layer should have high gloss.
- the disadvantages of the prior art regarding the toxicity and carcinogenicity of Cr (VI) compounds should be avoided.
- This object is achieved by a method of electrodepositing chromium, preferably hard chrome, on a substrate of an electrolyte solution containing Cr (II), Cr (III) or mixtures thereof and halides by preventing the formation of elemental halogen by using a solution anode or by complexing the elemental halogen formed during the deposition.
- the preferred halides are iodides and bromides, although preference is given to the bromides or mixed solutions of iodide / bromide.
- the preparation of the electrolyte solutions by dissolution of Cr metal takes place in acidic halide solutions.
- the production of the electrolyte solutions by mixing a solution of Cr (III) halide and a Cr (II) -containing solution.
- the preparation of the Cr (II) -containing solution is carried out discontinuously by dissolving Cr metal and admixing it with the electrolyte solution.
- the preparation of the Cr (II) -containing solution by dissolving Cr metal and the admixing with the electrolyte solution is carried out continuously by means of a bypass.
- the preparation of the electrolyte solutions by dissolution of Cr (III) halides and the in situ - reduction of Cr (III) to Cr (II) takes place directly on the substrate or by means of at least one auxiliary electrode.
- the preparation of the electrolyte solutions by dissolution of Cr (III) halides and the ex situ - reduction of Cr (III) to Cr (II) by means of at least one auxiliary electrode.
- auxiliary electrode In conventional Cr (VI) electrolytes, a too high local concentration of Cr (II) ions at the cathode is largely prevented by the high oxidation power of the high excess Cr (VI) ions.
- an auxiliary electrode If an auxiliary electrode is used, this preferably has a (negative) hydrogen overvoltage of at least 450 mV in the range of technical current densities.
- a sufficiently high overvoltage for hydrogen can be provided when using an auxiliary electrode, that the auxiliary electrode has a surface of Pb, Hg, amalgam or preferably of conductive (eg boron-doped) diamonds.
- the electrolyte solutions have complexing agents for elemental halogen in order to prevent the release of toxic halogens.
- the complexing agent is a quaternary ammonium compound or a mixture of such compounds.
- suitable ammonium compounds are N-methyl-ethyl-pyrolidinium bromide and N-methyl-ethyl-morpholinium-bromide.
- the complex which is formed from a reaction of the complexing agent with halogen, preferably bromine or iodine during the metal deposition, by reduction reaction to the complexing agent and halide, preferably bromide or iodide, regenerated and can be recycled in this way , This regeneration can be done for example by recombination with cathodically formed hydrogen or by dissolution of chromium metal.
- halogen preferably bromine or iodine during the metal deposition
- halide preferably bromide or iodide
- the solution anode consists of chromium metal or comprises chromium alloys.
- the embodiments will also show in detail, it has surprisingly been found to be favorable when the galvansiche deposition takes place at temperatures below 40 ° C, preferably between 20 ° C and 37 ° C. With these process conditions, it was possible to achieve qualitatively very high-quality layers.
- hardnesses of up to 1650 HV were achieved by this process, in particular when complexing agents are used, which thus significantly exceed the hardness range of chromium from conventional Cr (VI) -B (up to about 1150 HV).
- the process according to the invention has the advantage of virtually unlimited layer thicknesses, similar to the Cr (VI) -based processes.
- the hardness of the deposited chromium is above 1150 HV and / or that the layer thickness of the deposited chromium is above 15 ⁇ m.
- a piece of copper sheet with 1 cm free surface was ground (grade 600), degreased and dissolved as a substrate in a simple 2 liter reaction vessel with a Pt-coated titanium expanded metal anode in 1 liter of a freshly prepared solution of 52 g (1 mole) of chromium powder in 2.6 mol HBr, at 47 ° C for 40 min. coated at a constant current density of 110 [A.dm " ], giving a uniform, glossy layer with a layer thickness of 8 ⁇ m and a hardness of 950 HV (Vickers hardness).
- the chromium layer obtained had a thickness of 60 ⁇ with very good layer quality and a hardness of 1400 HV.
- Example 2
- the formation of free halogen is avoided either by complex formation with elimination of organic, non-water-soluble halogen complexes of higher density, or by the use of solution anodes, which is possible in the case of halide solutions.
- the invention thus relates to a process for the galvanic production of chromium layers from Cr (VI) -free electrolytes based on acid halide solutions, in particular iodide and bromide.
- halogens preferably bromides or iodides
- chromium solution comprising a mixture of 2- and 3-valent high-level chromium ions on Cr (II)
- the present invention is based, for example, on tests for the deposition of Cr from CrBr 3 electrolytes, as well as from electrolytes based on Cr (II) / Cr (III) mixtures. These gave on Cu and steel substrates very good results in terms of layer quality and high layer thicknesses> 150 ⁇ .
- the solutions used preferably consist predominantly of halides, preferably bromides or iodides.
- the complexing agents for example, quaternary ammonium compounds, can effect the attachment of free halide to form separable organic bromine complexes.
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)
- Electrolytic Production Of Metals (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT18172010A AT510422B1 (de) | 2010-11-04 | 2010-11-04 | Verfahren zur abscheidung von hartchrom aus cr(vi)- freien elektrolyten |
PCT/EP2011/069144 WO2012059473A1 (fr) | 2010-11-04 | 2011-10-31 | Procédé de dépôt de chrome dur à partir d'électrolytes exempts de cr(vi) |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2635724A1 true EP2635724A1 (fr) | 2013-09-11 |
EP2635724B1 EP2635724B1 (fr) | 2014-12-17 |
Family
ID=44913267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11779627.6A Not-in-force EP2635724B1 (fr) | 2010-11-04 | 2011-10-31 | Procédé de placage de chrome dur à partir d'un électrolyte sans cr(vi) |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2635724B1 (fr) |
AT (1) | AT510422B1 (fr) |
ES (1) | ES2531319T3 (fr) |
WO (1) | WO2012059473A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015202910A1 (de) | 2015-02-18 | 2016-08-18 | Dr.-Ing. Max Schlötter GmbH & Co KG | Zinn-Nickel-Schicht mit hoher Härte |
CN109056005A (zh) * | 2018-09-11 | 2018-12-21 | 沈阳飞机工业(集团)有限公司 | 一种应用电沉积技术制备铬硼合金的方法 |
DE102021002197A1 (de) | 2021-04-27 | 2022-10-27 | VDEh-Betriebsforschungsinstitut Gesellschaft mit beschränkter Haftung | Vorrichtung und Verfahren zum Beschichten eines Bauteils oder Halbzeugs mit einer Chromschicht |
CN114525557B (zh) * | 2022-03-01 | 2024-01-02 | 九牧厨卫股份有限公司 | 一种杀菌环保复合镀层及其制备方法和杀菌环保产品 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE330317C (de) * | 1920-12-11 | Ludwig Schmidt | Vorrichtung zum Einschalten der Feuerschutzmittel an Kinematographen | |
DE575450C (de) | 1930-12-14 | 1933-04-28 | Productores De Yoto De Chile A | Verfahren zur elektrolytischen Abscheidung von Chrom |
DE579065C (de) | 1932-07-01 | 1933-06-21 | Productores De Yodo De Chile A | Verfahren zur elektrolytischen Abscheidung von Chrom |
GB1144913A (en) | 1966-10-31 | 1969-03-12 | British Non Ferrous Metals Res | Electrodeposition of chromium |
GB1368747A (en) * | 1971-11-23 | 1974-10-02 | British Non Ferrous Metals Res | Electrodeposition of chromium |
GB1482747A (en) * | 1973-10-10 | 1977-08-10 | Bnf Metals Tech Centre | Chromium plating baths |
US4054494A (en) * | 1973-12-13 | 1977-10-18 | Albright & Wilson Ltd. | Compositions for use in chromium plating |
US4107004A (en) | 1975-03-26 | 1978-08-15 | International Lead Zinc Research Organization, Inc. | Trivalent chromium electroplating baths and method |
GB1488381A (en) | 1975-09-01 | 1977-10-12 | Bnf Metals Tech Centre | Trivalent chromium plating bath |
DE3274123D1 (en) * | 1982-03-05 | 1986-12-11 | M & T Chemicals Inc | Control of anode gas evolution in trivalent chromium plating bath |
CA1244376A (fr) * | 1983-05-12 | 1988-11-08 | Thaddeus W. Tomaszewski | Electrolyte de chrome trivalent et mode d'utilisation |
US4804446A (en) | 1986-09-19 | 1989-02-14 | The United States Of America As Represented By The Secretary Of Commerce | Electrodeposition of chromium from a trivalent electrolyte |
DE4011201C1 (en) * | 1990-04-06 | 1991-08-22 | Lpw-Chemie Gmbh, 4040 Neuss, De | Coating workpiece with chromium for improved corrosion resistance - comprises using aq. electrolyte soln. contg. chromic acid sulphate ions, and fluoro:complexes to increase deposition |
ES2669050T3 (es) | 2006-03-31 | 2018-05-23 | Atotech Deutschland Gmbh | Depósito de cromo cristalino |
US20080169199A1 (en) | 2007-01-17 | 2008-07-17 | Chang Gung University | Trivalent chromium electroplating solution and an electroplating process with the solution |
WO2010069458A1 (fr) * | 2008-12-17 | 2010-06-24 | Merck Patent Gmbh | Complexes d'hexahalochromate (iii) |
-
2010
- 2010-11-04 AT AT18172010A patent/AT510422B1/de not_active IP Right Cessation
-
2011
- 2011-10-31 WO PCT/EP2011/069144 patent/WO2012059473A1/fr active Application Filing
- 2011-10-31 EP EP11779627.6A patent/EP2635724B1/fr not_active Not-in-force
- 2011-10-31 ES ES11779627T patent/ES2531319T3/es active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012059473A1 * |
Also Published As
Publication number | Publication date |
---|---|
AT510422A4 (de) | 2012-04-15 |
ES2531319T3 (es) | 2015-03-12 |
EP2635724B1 (fr) | 2014-12-17 |
AT510422B1 (de) | 2012-04-15 |
WO2012059473A1 (fr) | 2012-05-10 |
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