EP3964609A1 - Elektroplattiertes produkt und verfahren zur herstellung solcher produkte mit einer hochtemperaturbehandlung - Google Patents

Elektroplattiertes produkt und verfahren zur herstellung solcher produkte mit einer hochtemperaturbehandlung Download PDF

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Publication number
EP3964609A1
EP3964609A1 EP21193623.2A EP21193623A EP3964609A1 EP 3964609 A1 EP3964609 A1 EP 3964609A1 EP 21193623 A EP21193623 A EP 21193623A EP 3964609 A1 EP3964609 A1 EP 3964609A1
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EP
European Patent Office
Prior art keywords
finishing agent
zinc
layer
resin
ions
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.)
Withdrawn
Application number
EP21193623.2A
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English (en)
French (fr)
Inventor
Yoann Coll
Robert LASSAK
Janine VOELKER
Alexander BRIKS
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.)
Coventya GmbH
Coventya SAS
Original Assignee
Coventya GmbH
Coventya SAS
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 Coventya GmbH, Coventya SAS filed Critical Coventya GmbH
Publication of EP3964609A1 publication Critical patent/EP3964609A1/de
Withdrawn legal-status Critical Current

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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
    • C25D3/22—Electroplating: Baths therefor from solutions of zinc
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/50—Treatment of iron or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
    • C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
    • 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
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
    • 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
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
    • 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
    • C25D5/48—After-treatment of electroplated surfaces
    • 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
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium

Definitions

  • the present invention refers to a method for preparing an electroplated product by applying different steps, i.a. a heat treatment step, to obtain a product that is resistant to the white haze effect. Moreover, the invention refers to such electroplated products.
  • Zinc and zinc alloys are common materials used for plating in many applications. They offer a good corrosion resistance especially for the zinc alloy with a competitive price.
  • this first metal layer it is common to use a conversion layer (i.e. a passivation layer) on top of the zinc or zinc alloy.
  • a conversion layer i.e. a passivation layer
  • chromium salts are widely used in the industry for conversion layers. Hexavalent chromium salts were historically used for conversion layers on zinc or zinc alloys but this substance is under regulatory pressure due to its toxic nature. In consequence, trivalent chromium conversion layers have gained more and more popularity. The colour of the chromating layers can be varied by composition of the solutions and by the working parameters in the treatment. A black trivalent chromium conversion layer can be obtained.
  • Those types of passivation layers are widely used in the automotive industry and especially for screws and other fasteners.
  • black pigmented passivation layers do not bear the same corrosion protection as it is found in non-pigmented, so called clear or iridescent conversion layers.
  • the black pigments do not contribute to corrosion protection and to some extend may interfere with the barrier functionality.
  • the black passivation layers are in particular prone to a phenomenon called white haze. This is in particular true in a corrosive environment resulting in a white grey layer appearing on the passivation layer. It poses a problem since this change of appearance makes the detection of white rust quite difficult. Hence, there is a need for a process to obtain a better resistance to white haze.
  • US9567453B2 discloses a water-soluble finishing agent for a trivalent chromium chemical conversion coating film, which has low insulation, no problems with tightening properties, outstanding gloss and high corrosion resistance, and can obtain a trivalent chromium chemical conversion coating film, in particular a black trivalent chromium chemical conversion coating film, having few scratches and flaws.
  • JP2008255408A discloses a chemical conversion coating on zinc or zinc alloy that is composed of an aqueous solution of pH 3 to 9 containing a heated reaction product in an amount of 0.1 to 10 g/L in terms of a chromium metal amount, the heated reaction product being obtained by bringing at least one kind of carboxylic acids selected from a group consisting of carboxylic acid, the ammonium salt of carboxylic acid and the acid adduct salt of amino carboxylic acid, and a trivalent chromium compound.
  • WO2015036124 discloses a treatment solution for a method for producing an anti-corrosion coating layer on a metal surface, wherein the surface to be treated is brought in contact with a treatment solution, which contains a chromium(III) ion source, a phosphate source, a zinc ion source, and a citrate source, wherein the amount-of-substance ratio of chromium(III) ions to zinc ions is 1 to at least 1.65 and the amount-of-substance ratio of chromium(III) ions to citrate is 1 to at least 1.4 and the treatment solution is substantially free of polymers that can be obtained by reacting one or more alkoxysilanes of the formula: R4-xSi(OR1)x.
  • US9499700B2 discloses a finishing agent satisfying a condition that (A) the ratio of the chromium equivalent molar concentration of a water-soluble trivalent chromium-containing substance contained in the finishing agent relative to the phosphorus equivalent molar concentration of a water-soluble phosphoric acid-based compound contained in the finishing agent is at least 0.5, or a condition that (B) a water-soluble aluminum-containing substance and/or a water-soluble zirconium-containing substance are contained in the finishing agent.
  • WO2011000969A1 discloses a method for producing an anti-corrosive cover layer, a surface to be treated being brought into contact with an aqueous treatment solution containing chromium(III) ions and at least one phosphate compound and an organosol.
  • the method improves the anti-corrosion protection of metal, in particular zinc-containing surfaces and zinc-containing surfaces provided with conversion layers. This produces or improves the decorative and functional properties of the surfaces.
  • a method for preparing an electroplated product by electroplating a substrate comprising the following steps:
  • the trivalent chromium ions of the passivation layer are especially present in the form of at least one trivalent chromium compound.
  • step e after the heating in step d), in a further step e), a heating of the layers at temperatures from 150°C to 250°C for 20 minutes to 15 hours is conducted.
  • the zinc alloy of the first metal layer is selected from the group consisting of zinc nickel alloys, zinc iron alloys and zinc nickel iron alloys.
  • the first metal layer comprises a zinc nickel alloy with from 10 wt.-% to 20 wt.-% of nickel, preferably from 11 wt.-% to 18 wt.-% of nickel, more preferably from 12 wt.-% to 15 wt.-% of nickel, or consists thereof.
  • the first metal layer comprises a zinc iron alloy with from 2 wt.-% to 18 wt.-% of iron, preferably 7 wt.-% to 16 wt.- % of iron, more preferably 8wt.- % to 16 wt.- % of iron, or consists thereof.
  • step e) is conducted at temperatures from 160 to 240°C, preferably from 175 to 220°C.
  • the heating in step e) is conducted for 1 hour to 15 hours, preferably 2 hours to 10 hours, more preferably 3 hours to 9 hours.
  • a top coat layer is deposited on the finishing agent layer, wherein the top coat layer preferably comprises a polymer and/or a colloidal corrosion inhibitor and/or a wax.
  • the passivation layer and/or the finishing agent layer is free of cobalt.
  • the presence of cobalt ion in the bath is a source of health issue.
  • the passivation layer and/or the finishing agent layer comprise(s) cobalt.
  • the finishing agent layer comprises a wax or a non-wax friction adjuster, preferably a substance selected from the group consisting of polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PTFE), ethylenetetrafluoroethylene (ETFE), perfluorinated polyethers (PFPE), polyvinylidene fluoride (PVDF), tetrafluoroethylene / hexafluoroethylene copolymer (FEP), perfluoroalkoxy copolymer (PFA), polysulfones, MoS 2 , WS 2 , TiS 2 , BN graphite, polyvinylchloride (PVC), polystyrene (PS), metacrylate resin, polycarbonate (PC), polyamide (PA), polyimide (PI), polyacetal, fluororesin, urea resin, phenol resin, unsaturated polyester resin, polyurethane, alkyd resin, epoxy resin, melamine resin, par
  • the above mentioned substances advantageously increase the wear resistance of surfaces and allow obtaining advantageous sliding properties such as a low coefficient of friction.
  • finishing agent layer comprises trivalent chromium ions and/or phosphate ions and/or zinc ions and/or citrate ions.
  • the finishing agent layer can comprise (trivalent) chromium compounds and/or zinc compounds.
  • the first metal layer has preferably a thickness from 1 ⁇ m to 20 ⁇ m.
  • the black passivation layer has preferably a thickness from 0.05 ⁇ m to 1 ⁇ m.
  • the finishing agent layer has preferably a thickness from 0.1 ⁇ m to 1 ⁇ m.
  • the top coat layer has preferably a thickness from 0.1 ⁇ m to 2 ⁇ m.
  • the drying step d) is conducted at temperatures of 60 to 100°C, preferably at temperatures of 70 to 90°C.
  • the drying step is conducted preferably for 5 to 15 minutes.
  • the inventive method provides electroplated products being able to pass the Neutral Salt Spray (NSS) test according ISO 9227 according to the VW standard TL 244 requirements and/or RNES - B - 0059 Renault Nissan requirements up to 168 hours without any optical change of aspect of the electroplated product.
  • NSS Neutral Salt Spray
  • the black passivation layer according to the present invention has an L value lower than 40 and the electroplated product passes NSS test according ISO 9227 according to the VW standard TL 244 requirements and/or RNES - B - 0059 Renault Nissan requirements up to 168 hours without any optical change of aspect of the electroplated product.
  • the black passivation layer has an L value lower than 30, preferably lower than 25.
  • the first metal layer has preferably a thickness from 1 ⁇ m to 20 ⁇ m.
  • the black passivation layer has preferably a thickness from 0.05 ⁇ m to 1 ⁇ m.
  • the finishing agent layer has preferably a thickness from 0.1 ⁇ m to 1 ⁇ m.
  • the top coat layer has preferably a thickness from 0.1 ⁇ m to 2 ⁇ m.
  • the finishing agent layer comprises chromium ions and/or phosphate ions and/or zinc ions and/or citrate ions.
  • the finishing agent layer can comprise (trivalent) chromium compounds and/or zinc compounds.
  • the finishing agent layer comprises a wax or a non-wax friction adjuster, preferably a substance selected from the group consisting of polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PTFE), ethylenetetrafluoroethylene (ETFE), perfluorinated polyethers (PFPE), polyvinylidene fluoride (PVDF), tetrafluoroethylene / hexafluoroethylene copolymer (FEP), perfluoroalkoxy copolymer (PFA), polysulfones, MoS 2 , WS 2 , TiS 2 , BN graphite, polyvinylchloride (PVC), polystyrene (PS), metacrylate resin, polycarbonate (PC), polyamide (PA), polyimide (PI), polyacetal, fluororesin, urea resin, phenol resin, unsaturated polyester resin, polyurethane, alkyd resin, epoxy resin, melamine resin, par
  • a top coat layer is deposited on the finishing agent layer as a finish, wherein the top coat layer preferably comprises a polymer and/or a colloidal corrosion inhibitor and/or a wax or a non-wax friction adjuster.
  • the top coat layer allowed that the coefficient of friction can be adjusted between 0.09 to 0.15 or 0.12 to 0.18.
  • the wax comprised in the top coat are polyethylene waxes (in the form of an emulsion). Waxes advantageously increase the wear resistance of surfaces and allow obtaining advantageous sliding properties such as a low coefficient of friction.
  • the polymer comprised in the top coat are the acrylic copolymers of the type methacrylic or vinylic resins. These are polymers of the esters of acrylic acid or methacrylic acid and may have as alcohol component an unsubstituted alkyl group or substituted by functional groups, for example methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, pentyl and hexyl and their isomers and higher homologues, 2-ethylhexyl acrylate, phenoxyethyl, hydroxyethyl, 2-hydroxypropyl, caprolactone hydroxyethyl or dimethylaminoethyl.
  • these are polymers of the esters of acrylic acid or methacrylic acid and may have as alcohol component an unsubstituted alkyl group or substituted by functional groups, for example methyl, ethyl, propyl, isopropyl, n
  • colloidal corrosion inhibitor comprised in the top coat is silicon dioxide.
  • the plating is conducted on a steel substrate screw or steel plate.
  • the first metal layer is composed of zinc nickel alloy with a nickel content of 12 to 15 weight% and a thickness of 8 to 10 ⁇ m on the head of the screw or is composed of a zinc iron alloy with an iron content of 12 to 14 weight%.
  • the iron content could be chosen to be in the range of 8 to 14 weight%.
  • an activation with a 0.1% HCl solution is conducted subsequently. More detail protocol on the plating bath can be found in the examples of the patent WO2005073438A1 .
  • the conversion layer is deposited by dipping the screw or panel plated in step 1 during 60 seconds in a trivalent chromium cobalt-free solution at a pH of 2.0 and a temperature around 25°C followed by a rinsing step with water.
  • the finishing agent layer is deposited for 15 seconds with a solution at a pH of 4.3 and a temperature around 25°C followed by a drying step for 10 minutes at 80°C in a centrifuge. After the deposition of the finishing agent layer no further rinsing step is necessary.
  • the finishing agent layer comprised of cobalt, for the other samples there were cobalt free.
  • the deposition of a top-coat layer is conducted by dipping in a polymer, colloidal corrosion inhibitor, and a wax solution followed by a drying step for 10 minutes at 80°C in a centrifuge.
  • TTH thermal treatment
  • Table 1 Sample ZnNi/ZnFe Activation with HCl Top coat TTH Thermal shock before NSST 1 ZnNi No No No No No 2 ZnNi No No Yes After Post Dip 8h 200°C No 3 ZnNi No Yes No No No 4 ZnNi No Yes Yes After Post Dip Before Top Coat 8h 200°C No 5 ZnNi No No No Yes 2h 120°C 6 ZnNi No No Yes After Post Dip 8h 200°C Yes 2h 120°C 7 ZnNi No Yes No Yes 2h 120°C 8 ZnNi No Yes Yes After Post Dip Before Top Coat 8h 200°C Yes 2h 120°C 9 ZnNi No Yes Yes After ZnNi before Passivation 8h 200°C No 10 ZnNi No Yes Yes After Passivation Before Finishing agent 8h 200°C No 11 ZnNi No No Yes After ZnNi Before Passivation 8h 200°C No 12 ZnNi
  • the white haze resistance was evaluated by the resistance to the Neutral Salt Spray (NSS) Test. Those experiments were conducted with a Braive 2000L corrosion chamber following the norm ISO 9227.
  • the first test were set to be in line with the VW standard TL 244 requirements and/or RNES - B - 0059 Renault Nissan. So, the duration was set around 200 hours.
  • To assess the white haze resistance we observed the samples and noted the severity of white haze (WH).
  • the coefficient of friction is a value that is essential for certain piece of equipment especially for screws.
  • a way to modulate this value is by adding wax to the finishing agent layer and/or topcoat.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
EP21193623.2A 2020-08-28 2021-08-27 Elektroplattiertes produkt und verfahren zur herstellung solcher produkte mit einer hochtemperaturbehandlung Withdrawn EP3964609A1 (de)

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EP20193421 2020-08-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4239100A1 (de) * 2022-03-03 2023-09-06 Advanced Capital Management Schweiz AG Verfahren zur beschichtung eines substrats und zubehörteil eines elektrohaushaltsgeräts zur anwendung in der gastronomie

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1484432A1 (de) * 2002-03-14 2004-12-08 Dipsol Chemicals Co., Ltd. Behandlungslösung zur herstellung eines schwarzen, kein sechswertiges chrom enthaltenden chemischen überzugs auf mit zink oder zinklegierung plattiertem substrat und verfahren zur herstellung eines schwarzen, kein sechswertiges chrom enthaltenden chemischen überzugs auf mit zink oder zinklegierung plattiertem substrat
WO2005073438A1 (fr) 2003-12-31 2005-08-11 Coventya Sas Installation de depot de zinc ou d’alliages de zinc
JP2008255408A (ja) 2007-04-04 2008-10-23 Okuno Chem Ind Co Ltd 亜鉛又は亜鉛合金上に形成された化成皮膜に対するオーバーコート用組成物
WO2011000969A1 (de) 2009-07-03 2011-01-06 Atotech Deutschland Gmbh Korrosionsschutzbehandlung für oberflächen aus zink und zinklegierungen
WO2015036124A1 (de) 2013-09-13 2015-03-19 Hillebrand Chemicals Gmbh Chrom (lll)-enthaltenden behandlungslösung für ein verfahren zum erzeugen einer korrosionsschützenden überzugsschicht, konzentrat einer solchen behandlungslösung und verfahren zum erzeugen einer korrosionsschützenden überzugsschicht
EP3040447A1 (de) * 2013-08-28 2016-07-06 Dipsol Chemicals Co., Ltd. Schwarzes verbindungselement für fahrzeuge mit hervorragender korrosionsbeständigkeit und schwarzem erscheinungsbild
EP3040446A1 (de) * 2013-08-28 2016-07-06 Honda Motor Company Limited Schwarzes beschichtungsfilmbildendes fahrzeugteil und/oder befestigungselement und herstellungsverfahren dafür
US9499700B2 (en) 2010-09-14 2016-11-22 Yuken Industry Co., Ltd. Finishing agent for chemical conversion coating and method for producing same
US9567453B2 (en) 2011-04-01 2017-02-14 Dipsol Chemicals Co., Ltd. Finishing agent for trivalent chromium chemical conversion coating film, and method for finishing black trivalent chromium chemical conversion coating film

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1484432A1 (de) * 2002-03-14 2004-12-08 Dipsol Chemicals Co., Ltd. Behandlungslösung zur herstellung eines schwarzen, kein sechswertiges chrom enthaltenden chemischen überzugs auf mit zink oder zinklegierung plattiertem substrat und verfahren zur herstellung eines schwarzen, kein sechswertiges chrom enthaltenden chemischen überzugs auf mit zink oder zinklegierung plattiertem substrat
WO2005073438A1 (fr) 2003-12-31 2005-08-11 Coventya Sas Installation de depot de zinc ou d’alliages de zinc
JP2008255408A (ja) 2007-04-04 2008-10-23 Okuno Chem Ind Co Ltd 亜鉛又は亜鉛合金上に形成された化成皮膜に対するオーバーコート用組成物
WO2011000969A1 (de) 2009-07-03 2011-01-06 Atotech Deutschland Gmbh Korrosionsschutzbehandlung für oberflächen aus zink und zinklegierungen
US9499700B2 (en) 2010-09-14 2016-11-22 Yuken Industry Co., Ltd. Finishing agent for chemical conversion coating and method for producing same
US9567453B2 (en) 2011-04-01 2017-02-14 Dipsol Chemicals Co., Ltd. Finishing agent for trivalent chromium chemical conversion coating film, and method for finishing black trivalent chromium chemical conversion coating film
EP3040447A1 (de) * 2013-08-28 2016-07-06 Dipsol Chemicals Co., Ltd. Schwarzes verbindungselement für fahrzeuge mit hervorragender korrosionsbeständigkeit und schwarzem erscheinungsbild
EP3040446A1 (de) * 2013-08-28 2016-07-06 Honda Motor Company Limited Schwarzes beschichtungsfilmbildendes fahrzeugteil und/oder befestigungselement und herstellungsverfahren dafür
WO2015036124A1 (de) 2013-09-13 2015-03-19 Hillebrand Chemicals Gmbh Chrom (lll)-enthaltenden behandlungslösung für ein verfahren zum erzeugen einer korrosionsschützenden überzugsschicht, konzentrat einer solchen behandlungslösung und verfahren zum erzeugen einer korrosionsschützenden überzugsschicht

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4239100A1 (de) * 2022-03-03 2023-09-06 Advanced Capital Management Schweiz AG Verfahren zur beschichtung eines substrats und zubehörteil eines elektrohaushaltsgeräts zur anwendung in der gastronomie

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