FR2115092A1 - Electrodeposition of anti corrosion coatings - contg molybdenum and a transition metal - Google Patents

Electrodeposition of anti corrosion coatings - contg molybdenum and a transition metal

Info

Publication number
FR2115092A1
FR2115092A1 FR7042950A FR7042950A FR2115092A1 FR 2115092 A1 FR2115092 A1 FR 2115092A1 FR 7042950 A FR7042950 A FR 7042950A FR 7042950 A FR7042950 A FR 7042950A FR 2115092 A1 FR2115092 A1 FR 2115092A1
Authority
FR
France
Prior art keywords
pref
transition metal
contg
degrees
electrodeposition
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
Application number
FR7042950A
Other languages
French (fr)
Other versions
FR2115092B1 (en
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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7042950A priority Critical patent/FR2115092A1/en
Priority to DE19712158281 priority patent/DE2158281A1/en
Publication of FR2115092A1 publication Critical patent/FR2115092A1/en
Priority to US05/370,629 priority patent/US3947331A/en
Application granted granted Critical
Publication of FR2115092B1 publication Critical patent/FR2115092B1/fr
Granted 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
    • 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
    • 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
    • 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
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/623—Porosity of the 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
    • C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance

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)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

Coatings having high resistance against corrosion esp. by acids at elevated temps. are cathodically formed in a bath contg an alkali molybdate (pref. Na2MoO4) a salt of a transition metal (pref. Ni chloride or sulphate), and an alkali salt of an organic hydroxy acid capable of forming complexes with metallic ions present in the bath (pref. trisodium citrate). The pH is 9-11, pref. 9.5 and the pref. temp. is 20-60 degrees C. The cathodic current density should be above the fissure-formation threshold; it pref. amounts to 6-7 A/dm2. The time of the treatment should be below the 'peeling-off' threshold; pref. 60-90 mins. The coating is subsequently heated at 700-1200 degrees C for 2-24 hrs. in a non-oxidising medium. It can be applied to various steels, Cu, Co, Ti etc. and also to ceramic materials provided with an electroconductive layer.
FR7042950A 1970-11-30 1970-11-30 Electrodeposition of anti corrosion coatings - contg molybdenum and a transition metal Granted FR2115092A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7042950A FR2115092A1 (en) 1970-11-30 1970-11-30 Electrodeposition of anti corrosion coatings - contg molybdenum and a transition metal
DE19712158281 DE2158281A1 (en) 1970-11-30 1971-11-24 Process for the electrolytic application of a coating containing molybdenum to a substrate
US05/370,629 US3947331A (en) 1970-11-30 1973-06-18 Methods for forming an electrolytic deposit containing molybdenum on a support and the products obtained thereby

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7042950A FR2115092A1 (en) 1970-11-30 1970-11-30 Electrodeposition of anti corrosion coatings - contg molybdenum and a transition metal

Publications (2)

Publication Number Publication Date
FR2115092A1 true FR2115092A1 (en) 1972-07-07
FR2115092B1 FR2115092B1 (en) 1973-12-07

Family

ID=9064926

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7042950A Granted FR2115092A1 (en) 1970-11-30 1970-11-30 Electrodeposition of anti corrosion coatings - contg molybdenum and a transition metal

Country Status (2)

Country Link
DE (1) DE2158281A1 (en)
FR (1) FR2115092A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033837A (en) * 1976-02-24 1977-07-05 Olin Corporation Plated metallic cathode

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
(REVUE JAPONAISE KOGYO KAGAKU ZASSHI VOLUME 63 1960 1336-9) *
REVUE JAPONAISE KOGYO KAGAKU ZASSHI VOLUME 63 1960 1336-9) *

Also Published As

Publication number Publication date
DE2158281A1 (en) 1972-05-31
FR2115092B1 (en) 1973-12-07

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Legal Events

Date Code Title Description
ST Notification of lapse