FR2091934A1 - Treatment of magnesium articles - prior to chrome plating - Google Patents

Treatment of magnesium articles - prior to chrome plating

Info

Publication number
FR2091934A1
FR2091934A1 FR7017923A FR7017923A FR2091934A1 FR 2091934 A1 FR2091934 A1 FR 2091934A1 FR 7017923 A FR7017923 A FR 7017923A FR 7017923 A FR7017923 A FR 7017923A FR 2091934 A1 FR2091934 A1 FR 2091934A1
Authority
FR
France
Prior art keywords
treatment
plating
bath
articles
prior
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
FR7017923A
Other languages
French (fr)
Other versions
FR2091934B1 (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.)
PESCHER GEORGES
Delarue SAS
Original Assignee
PESCHER GEORGES
Delarue 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 PESCHER GEORGES, Delarue SAS filed Critical PESCHER GEORGES
Priority to FR7017923A priority Critical patent/FR2091934A1/en
Publication of FR2091934A1 publication Critical patent/FR2091934A1/en
Priority to FR7119969A priority patent/FR2139728A2/fr
Application granted granted Critical
Publication of FR2091934B1 publication Critical patent/FR2091934B1/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
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals

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)
  • Electroplating Methods And Accessories (AREA)

Abstract

Treatment process comprises (a) simultaneously degreasing and etching the article in a bath contng. H2SO4 H3PO4 and /or HNO3 together with a quat. ammonium salt compsn. based on gluconic acid and phosphate (e.g. NIVOX 03SP (RTM), (b) electrolytically activating the articles with periodic inversion of polarity at 6V and 60-80 degrees C in a bath contg. K4P2O7 and Na2CO3, (c) zinc-plating electrolytically at 3-4V and 60-80 degrees C in a bath contg. K4P2O7, Na2CO3 and ZnSO4 at is approx. pH 10, and (d) Cu-plating the article by any conventional process. Used for treating articles used in printing and graphic arts, the process gives coatings of improved quality and durability.
FR7017923A 1970-05-15 1970-05-15 Treatment of magnesium articles - prior to chrome plating Granted FR2091934A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7017923A FR2091934A1 (en) 1970-05-15 1970-05-15 Treatment of magnesium articles - prior to chrome plating
FR7119969A FR2139728A2 (en) 1970-05-15 1971-06-02

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7017923A FR2091934A1 (en) 1970-05-15 1970-05-15 Treatment of magnesium articles - prior to chrome plating
FR7119969A FR2139728A2 (en) 1970-05-15 1971-06-02

Publications (2)

Publication Number Publication Date
FR2091934A1 true FR2091934A1 (en) 1971-01-21
FR2091934B1 FR2091934B1 (en) 1973-05-25

Family

ID=26215746

Family Applications (2)

Application Number Title Priority Date Filing Date
FR7017923A Granted FR2091934A1 (en) 1970-05-15 1970-05-15 Treatment of magnesium articles - prior to chrome plating
FR7119969A Pending FR2139728A2 (en) 1970-05-15 1971-06-02

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR7119969A Pending FR2139728A2 (en) 1970-05-15 1971-06-02

Country Status (1)

Country Link
FR (2) FR2091934A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030305A1 (en) * 1979-12-07 1981-06-17 Norsk Hydro A/S Chemical pretreatment for method for the electrolytical metal coating of magnesium articles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1108926A (en) * 1954-10-04 1956-01-19 Renault Electrolytic degreasing bath
FR1157194A (en) * 1956-08-08 1958-05-27 Pechiney Treatment of metal surfaces
FR1175464A (en) * 1956-06-20 1959-03-26 Dow Chemical Co Galvanization process for magnesium and its alloys
FR1554033A (en) * 1966-02-03 1969-01-17

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1108926A (en) * 1954-10-04 1956-01-19 Renault Electrolytic degreasing bath
FR1175464A (en) * 1956-06-20 1959-03-26 Dow Chemical Co Galvanization process for magnesium and its alloys
FR1157194A (en) * 1956-08-08 1958-05-27 Pechiney Treatment of metal surfaces
FR1554033A (en) * 1966-02-03 1969-01-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030305A1 (en) * 1979-12-07 1981-06-17 Norsk Hydro A/S Chemical pretreatment for method for the electrolytical metal coating of magnesium articles

Also Published As

Publication number Publication date
FR2091934B1 (en) 1973-05-25
FR2139728A2 (en) 1973-01-12

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