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ES2023577A6 - Procedimiento para la deposicion indirecta o directa de una capa tecnica de cromo duro, muy estable frente a la corrosion. - Google Patents

Procedimiento para la deposicion indirecta o directa de una capa tecnica de cromo duro, muy estable frente a la corrosion.

Info

Publication number
ES2023577A6
ES2023577A6 ES9002531A ES9002531A ES2023577A6 ES 2023577 A6 ES2023577 A6 ES 2023577A6 ES 9002531 A ES9002531 A ES 9002531A ES 9002531 A ES9002531 A ES 9002531A ES 2023577 A6 ES2023577 A6 ES 2023577A6
Authority
ES
Spain
Prior art keywords
pulse frequency
critical pulse
deposition
direct
plating layer
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 - Lifetime
Application number
ES9002531A
Other languages
English (en)
Inventor
Martin Kohl
Wolfgang Clauberg
Geb Pietzak Elisabeth Bieling
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.)
LPW Chemie GmbH
Original Assignee
LPW Chemie GmbH
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 LPW Chemie GmbH filed Critical LPW Chemie GmbH
Publication of ES2023577A6 publication Critical patent/ES2023577A6/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
    • 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
    • C25D5/18—Electroplating using modulated, pulsed or reversing current

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

PROCEDIMIENTO PARA LA DEPOSICION INDIRECTA O DIRECTA DE UNA CAPA TECNICA DE CROMO DURO, MUY ESTABLE FRENTE A LA CORROSION. PROCEDIMIENTO PARA LA DEPOSICION INDIRECTA O DIRECTA DE UNA CAPA TECNICA DE CROMO DURO MUY ESTABLE FRENTE A LA CORROSION SOBRE LA SUPERFICIE DE UNA PIEZA DE TRABAJO HECHA DE METAL, A PARTIR DE UN ELECTROLITO DE TRABAJO ACUOSO, QUE CONTIENE ACIDO CROMICO E IONES SULFATO. DURANTE LA DEPOSICION SE TRABAJA CON CORRIENTE CONTINUA PULSANTE QUE TIENE UNA FRECUENCIA DE PULSACION EN EL INTERVALO ENTRE UNA FRECUENCIA DE PULSACION CRITICA INFERIOR, DEPENDIENTE DE LA DENSIDAD DE CORRIENTE CATODICA ESCOGIDA Y UN PUNTO CRITICO SUPERIOR DE FRECUENCIA DE PULSACION, DEPENDIENTE DEL RENDIMIENTO DE CORRIENTE OPTIMIZADO A LA MISMA DENSIDAD DE CORRIENTE. SE INDICA COMO SE DETERMINAN LA FRECUENCIA DE PULSACION CRITICA INFERIOR Y EL PUNTO CRITICO SUPERIOR DE FRECUENCIA DE PULSACION. EN EL INTERVALO ENTRE LA FRECUENCIA DE PULSACION CRITICA INFERIOR Y EL PUNTO CRITICO SUPERIOR DE FRECUENCIA DEPULSACION, LA DURACION DE CONEXION SE ESCOGE TAN BAJA QUE SE EFECTUA UNA DEPOSICION BRILLANTE PRACTICAMENTE EXENTA DE FISURAS.
ES9002531A 1989-10-11 1990-10-05 Procedimiento para la deposicion indirecta o directa de una capa tecnica de cromo duro, muy estable frente a la corrosion. Expired - Lifetime ES2023577A6 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3933896A DE3933896C1 (es) 1989-10-11 1989-10-11

Publications (1)

Publication Number Publication Date
ES2023577A6 true ES2023577A6 (es) 1992-01-16

Family

ID=6391241

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9002531A Expired - Lifetime ES2023577A6 (es) 1989-10-11 1990-10-05 Procedimiento para la deposicion indirecta o directa de una capa tecnica de cromo duro, muy estable frente a la corrosion.

Country Status (5)

Country Link
JP (1) JPH03207884A (es)
DE (1) DE3933896C1 (es)
ES (1) ES2023577A6 (es)
FR (1) FR2652825B1 (es)
GB (1) GB2236763B (es)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5670265A (en) * 1990-10-20 1997-09-23 Ina Walzlager Schaeffler Kg Steel component with an electroplated anti-corrosive coating and process for producing same
DE4125585A1 (de) * 1990-10-20 1992-04-30 Schaeffler Waelzlager Kg Bauteil aus stahl mit galvanisch aufgebrachter korrosionsschutzschicht
USRE35860F1 (en) * 1991-06-05 2001-01-02 Timken Co Corrosion-resistant zinc-nickel plated bearing races
JPH05161904A (ja) * 1991-12-12 1993-06-29 Mishima Kosan Co Ltd 冷間圧延用ロール
US5352266A (en) * 1992-11-30 1994-10-04 Queen'university At Kingston Nanocrystalline metals and process of producing the same
IT1267394B1 (it) * 1994-02-18 1997-02-05 Ind S R L Procedimento per la realizzazione di riporti galvanici compositi in cromo duro con una fase dispersa e riporto anti-usura realizzato con
DE4430923C2 (de) * 1994-08-31 1997-10-09 Schaeffler Waelzlager Kg Galvanisches Chrombad, Verfahren zur galvanischen Abscheidung von Chrom und Verwendung des Bades
JP3918142B2 (ja) 1998-11-06 2007-05-23 株式会社日立製作所 クロムめっき部品、クロムめっき方法およびクロムめっき部品の製造方法
USRE40386E1 (en) 1998-11-06 2008-06-17 Hitachi Ltd. Chrome plated parts and chrome plating method
DE10006151A1 (de) * 2000-02-11 2001-09-06 Heinz Busch System mit einem Träger und einer Hartstoffbeschichtung
JP3423702B2 (ja) * 2000-08-29 2003-07-07 創輝株式会社 金属めっき方法
US20070068821A1 (en) 2005-09-27 2007-03-29 Takahisa Hirasawa Method of manufacturing chromium plated article and chromium plating apparatus
DE102004019370B3 (de) * 2004-04-21 2005-09-01 Federal-Mogul Burscheid Gmbh Herstellung einer strukturierten Hartchromschicht und Herstellung einer Beschichtung
CN107636206B (zh) 2015-05-12 2019-09-17 日立汽车系统株式会社 镀铬零件的制造方法及镀铬装置
KR20220043575A (ko) 2020-09-29 2022-04-05 주식회사 원탑플레이팅 크롬 도금 부품의 제조 방법 및 크롬 도금 장치

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232854A (en) * 1959-06-05 1966-02-01 Diamond Alkali Co Chromium plating
US4092226A (en) * 1974-12-11 1978-05-30 Nikolaus Laing Process for the treatment of metal surfaces by electro-deposition of metal coatings at high current densities
DE2604628A1 (de) * 1976-02-06 1977-08-11 Rosenloecher Claus Verfahren zur unmittelbaren galvanischen hartverchromung von nickel
JPS5914977B2 (ja) * 1978-07-27 1984-04-06 三菱電機株式会社 温度制御装置
DE3402554A1 (de) * 1984-01-26 1985-08-08 LPW-Chemie GmbH, 4040 Neuss Abscheidung von hartchrom auf einer metallegierung aus einem waessrigen, chromsaeure und schwefelsaeure enthaltenden elektrolyten
US4789437A (en) * 1986-07-11 1988-12-06 University Of Hong Kong Pulse electroplating process
JPS6332874A (ja) * 1986-07-24 1988-02-12 Matsushita Electric Works Ltd 蓄電池の温度センサ取付構造
IT1216808B (it) * 1987-05-13 1990-03-14 Sviluppo Materiali Spa Processo di elettrodeposizione in continuo di cromo metallico e di ossido di cromo su superfici metalliche
IT1215985B (it) * 1988-03-04 1990-02-22 Elca Srl Procedimento elettrochimico per la realizzazione di rivestimenti di cromo e metalli simili mediante corrente pulsante ad inversione periodica della polarita'

Also Published As

Publication number Publication date
DE3933896C1 (es) 1990-10-11
GB2236763B (en) 1993-11-17
FR2652825A1 (fr) 1991-04-12
FR2652825B1 (fr) 1993-12-24
GB9021528D0 (en) 1990-11-14
JPH03207884A (ja) 1991-09-11
GB2236763A (en) 1991-04-17

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