FR2286211A1 - Electrolytically stain proofing copper with chromium(VI) - in strongly alkaline bath to precipitate copper and chromous ions - Google Patents

Electrolytically stain proofing copper with chromium(VI) - in strongly alkaline bath to precipitate copper and chromous ions

Info

Publication number
FR2286211A1
FR2286211A1 FR7432435A FR7432435A FR2286211A1 FR 2286211 A1 FR2286211 A1 FR 2286211A1 FR 7432435 A FR7432435 A FR 7432435A FR 7432435 A FR7432435 A FR 7432435A FR 2286211 A1 FR2286211 A1 FR 2286211A1
Authority
FR
France
Prior art keywords
copper
electrolytically
chromium
strongly alkaline
alkaline bath
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
FR7432435A
Other languages
French (fr)
Other versions
FR2286211B1 (en
Inventor
Charles B Yates
Adam M Wolski
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.)
Circuit Foil USA Inc
Original Assignee
Yates Industries Inc
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 Yates Industries Inc filed Critical Yates Industries Inc
Priority to FR7432435A priority Critical patent/FR2286211A1/en
Publication of FR2286211A1 publication Critical patent/FR2286211A1/en
Application granted granted Critical
Publication of FR2286211B1 publication Critical patent/FR2286211B1/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
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/38—Chromatising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

Cu sheet is made cathodic in an aq. soln. contg. Cr6+-contg. anions and sufficiently alkaline to ppte. Cu and chrome ions. Pref. the bath is at pH 12-14, the cathode current density is 10-50A/ft2, bath temp. is 120-170 degrees C with chromate concn. 2-20g/l (calc. as CrO3), and treatment time is 4-8 secs. Partic. for treatment of foil for printed circuits.
FR7432435A 1974-09-26 1974-09-26 Electrolytically stain proofing copper with chromium(VI) - in strongly alkaline bath to precipitate copper and chromous ions Granted FR2286211A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7432435A FR2286211A1 (en) 1974-09-26 1974-09-26 Electrolytically stain proofing copper with chromium(VI) - in strongly alkaline bath to precipitate copper and chromous ions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7432435A FR2286211A1 (en) 1974-09-26 1974-09-26 Electrolytically stain proofing copper with chromium(VI) - in strongly alkaline bath to precipitate copper and chromous ions

Publications (2)

Publication Number Publication Date
FR2286211A1 true FR2286211A1 (en) 1976-04-23
FR2286211B1 FR2286211B1 (en) 1979-01-05

Family

ID=9143456

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7432435A Granted FR2286211A1 (en) 1974-09-26 1974-09-26 Electrolytically stain proofing copper with chromium(VI) - in strongly alkaline bath to precipitate copper and chromous ions

Country Status (1)

Country Link
FR (1) FR2286211A1 (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number Publication date
FR2286211B1 (en) 1979-01-05

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Legal Events

Date Code Title Description
ST Notification of lapse