WO2000011244A2 - Revetement pour pieces en acier trempe ou en fonte et procede d'application associe - Google Patents

Revetement pour pieces en acier trempe ou en fonte et procede d'application associe Download PDF

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Publication number
WO2000011244A2
WO2000011244A2 PCT/EP1999/006035 EP9906035W WO0011244A2 WO 2000011244 A2 WO2000011244 A2 WO 2000011244A2 EP 9906035 W EP9906035 W EP 9906035W WO 0011244 A2 WO0011244 A2 WO 0011244A2
Authority
WO
WIPO (PCT)
Prior art keywords
zinc
coating
nickel
cast iron
layer
Prior art date
Application number
PCT/EP1999/006035
Other languages
German (de)
English (en)
Other versions
WO2000011244A3 (fr
Inventor
Karl Fetzer
Roland Pfiz
Gernot Strube
Original Assignee
Dr. Ing. Max Schlötter Gmbh & Co. Kg
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 Dr. Ing. Max Schlötter Gmbh & Co. Kg filed Critical Dr. Ing. Max Schlötter Gmbh & Co. Kg
Publication of WO2000011244A2 publication Critical patent/WO2000011244A2/fr
Publication of WO2000011244A3 publication Critical patent/WO2000011244A3/fr

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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
    • C25D3/56—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
    • C25D5/10—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

Definitions

  • the present invention relates to a coating of components made of hardened steel or cast iron with zinc-containing. Alloys and a process for producing this coating.
  • Weakly acidic electrolytes do not have this disadvantage, which is why components made of hardened steel or cast iron are predominantly coated in these electrolytes.
  • Weakly acidic electrolytes have the disadvantage, however, that the current efficiency in the entire current density range usually used is almost 100%, so that the thickness of the deposition depends on the local current density. In the case of profiled components or tight curtains, very different layer thicknesses are obtained during the deposition.
  • the object of the present invention is therefore to provide a coating of hardened steel or cast iron, which is corrosion-resistant and insensitive to extreme thermal loads, and to provide a method for producing such a coating.
  • a coating made from a zinc-cobalt alloy with 0.1-6% by weight cobalt, particularly preferably with 0.3-1.3% by weight cobalt, from an acidic electrolyte (pH 2 to 6.5, preferably 4.8 to 5.4) deposited.
  • the second layer preferably consists of a zinc-nickel alloy with 6-18% by weight of nickel and particularly preferably 10-16% by weight of nickel, which is deposited from an alkaline electrolyte with a preferred hydroxide content corresponding to 60-150 g / 1 sodium hydroxide .
  • Commercial electrolytes for the deposition of zinc-cobalt alloys and zinc-nickel alloys can be used for the deposition.
  • an iron casting component is first coated with zinc in a weakly acidic zinc bath (SLOTANIT® OT) (medium layer approx. 5 ⁇ m) and then in an alkaline electrolyte (SLOTOLOY® ZN 50) with zinc Nickel (middle layer 6 - 8 ⁇ m, nickel content in the coating 15% nickel) coated.
  • SLOTANIT® OT weakly acidic zinc bath
  • SLOTOLOY® ZN 50 alkaline electrolyte
  • Example 1 Coating with zinc-cobalt / zinc-nickel
  • a corresponding cast iron component, as in the comparative example, is after customary pretreatment
  • Example 2 Coating with zinc-nickel / zinc-nickel
  • a corresponding component, as in the comparative example, is firstly treated in a weakly acidic electrolyte (SLOTOLOY® ZK 30 without the addition of cobalt, with the addition of 100 g / 1 nickel chloride) with zinc-nickel (medium coating) after the usual pretreatment (alkaline degreasing and acid activation) 5 ⁇ m, share of nickel in the coating 1% Ni) and then coated in an alkaline electrolyte (SLOTOLOY® ZN 50) with zinc-nickel (middle layer 6 - 8 ⁇ m, nickel content in the coating 15% Ni).
  • the components are then subjected to the following tests:
  • test b) red rust corrosion after 120 h.
  • Example 1 test a): no layer separation.
  • Example 1 test b): no red rust corrosion
  • Example 2 test a): as in example 1, test a) Example 2, test b): as in example 1, test b)

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)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

L'invention concerne un revêtement, destiné à des pièces en acier trempé ou en fonte, qui comprend deux couches. La couche interne est constituée soit d'un alliage zinc-cobalt renfermant de préférence 0,1 à 6 % en poids de Co, soit d'un alliage zinc-nickel renfermant de préférence 0,5 à 15 % en poids de Ni. La couche externe est un alliage zinc-nickel renfermant de préférence 6 à 18 % en poids de Ni. L'invention concerne également un procédé permettant de produire ledit revêtement, qui consiste à précipiter, par une technique électrolytique, la couche interne à partir d'un bain acide et la couche externe à partir d'un bain alcalin.
PCT/EP1999/006035 1998-08-18 1999-08-18 Revetement pour pieces en acier trempe ou en fonte et procede d'application associe WO2000011244A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19837431A DE19837431C2 (de) 1998-08-18 1998-08-18 Beschichtung von Bauteilen aus gehärtetem Stahl oder Eisenguß und Verfahren zur Aufbringung derselben
DE19837431.3 1998-08-18

Publications (2)

Publication Number Publication Date
WO2000011244A2 true WO2000011244A2 (fr) 2000-03-02
WO2000011244A3 WO2000011244A3 (fr) 2000-06-29

Family

ID=7877902

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/006035 WO2000011244A2 (fr) 1998-08-18 1999-08-18 Revetement pour pieces en acier trempe ou en fonte et procede d'application associe

Country Status (2)

Country Link
DE (1) DE19837431C2 (fr)
WO (1) WO2000011244A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2956668A1 (fr) * 2010-02-23 2011-08-26 Electro Rech Procede de galvanisation de pieces en fonte par electrodeposition

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10313257A1 (de) * 2003-03-25 2004-10-21 J. D. Theile Gmbh & Co Kg Kettenschloss aus Stahl für Gliederketten
EP2096193B1 (fr) * 2008-02-21 2013-04-03 Atotech Deutschland GmbH Procédé de préparation de pièces linéaires ou complexes, résistantes à la corrosion plaquées en zinc et en zinc-nickel
EP2157213B1 (fr) * 2008-08-08 2012-10-24 Wolf-Dieter Franz Couche de protection contre la corrosion dotée de deux couches de zinc
EP2784188B2 (fr) 2013-03-26 2018-04-25 ATOTECH Deutschland GmbH Procédé de protection contre la corrosion de matériaux contenant du fer
DE102014004652A1 (de) * 2014-03-29 2015-10-01 Daimler Ag Bauteil, insbesondere Strukturbauteil für einen Kraftwagen, sowie Verfahren zum Herstellen eines solchen Bauteils

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129129A1 (de) * 1981-07-20 1983-02-03 Schering Ag, 1000 Berlin Und 4619 Bergkamen Verfahren zur galvanischen abscheidung hochglaenzender, haftfester zinkueberzuege unter verwendung alkalischer cyanidfreier baeder
DE3934111A1 (de) * 1988-10-29 1990-05-03 Usui Kokusai Sangyo Kk Stahlerzeugnis mit waermebestaendigen, korrosionsbestaendigen ueberzugsschichten
US5330850A (en) * 1990-04-20 1994-07-19 Sumitomo Metal Industries, Ltd. Corrosion-resistant surface-coated steel sheet
DE19542313A1 (de) * 1994-11-14 1996-06-05 Usui Kokusai Sangyo Kk Hitzebeständiges und korrosionsfestes, lamellares, metallplattiertes Stahlmaterial mit gleichmäßiger Verarbeitbarkeit und Korrosionsschutz

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183491A (ja) * 1985-02-08 1986-08-16 Usui Internatl Ind Co Ltd 耐食性重合被覆鋼材
IT1225871B (it) * 1987-03-02 1990-12-07 Pirelli Miglioramenti ai fili metallici per rinforzo di materiali elastomerici

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129129A1 (de) * 1981-07-20 1983-02-03 Schering Ag, 1000 Berlin Und 4619 Bergkamen Verfahren zur galvanischen abscheidung hochglaenzender, haftfester zinkueberzuege unter verwendung alkalischer cyanidfreier baeder
DE3934111A1 (de) * 1988-10-29 1990-05-03 Usui Kokusai Sangyo Kk Stahlerzeugnis mit waermebestaendigen, korrosionsbestaendigen ueberzugsschichten
US5330850A (en) * 1990-04-20 1994-07-19 Sumitomo Metal Industries, Ltd. Corrosion-resistant surface-coated steel sheet
DE19542313A1 (de) * 1994-11-14 1996-06-05 Usui Kokusai Sangyo Kk Hitzebeständiges und korrosionsfestes, lamellares, metallplattiertes Stahlmaterial mit gleichmäßiger Verarbeitbarkeit und Korrosionsschutz

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CROTTY D: "Zinc Alloy Plating for the Automotive Industry" METAL FINISHING,US,ELSEVIER SCIENCE PUBLISHING, NEW YORK, NY, Bd. 94, Nr. 9, 1. September 1996 (1996-09-01), Seiten 54,56-58, XP004024590 ISSN: 0026-0576 *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 008 (C-396), 9. Januar 1987 (1987-01-09) -& JP 61 183491 A (USUI INTERNATL IND CO LTD), 16. August 1986 (1986-08-16) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2956668A1 (fr) * 2010-02-23 2011-08-26 Electro Rech Procede de galvanisation de pieces en fonte par electrodeposition

Also Published As

Publication number Publication date
WO2000011244A3 (fr) 2000-06-29
DE19837431C2 (de) 2001-10-31
DE19837431A1 (de) 2000-02-24

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