FR2445398A1 - Electroplating the bore of long narrow metal tubes - via thin steel anode wound with insulation and placed in bore of tube, followed by pumping alkaline electrolyte through tube - Google Patents

Electroplating the bore of long narrow metal tubes - via thin steel anode wound with insulation and placed in bore of tube, followed by pumping alkaline electrolyte through tube

Info

Publication number
FR2445398A1
FR2445398A1 FR7836529A FR7836529A FR2445398A1 FR 2445398 A1 FR2445398 A1 FR 2445398A1 FR 7836529 A FR7836529 A FR 7836529A FR 7836529 A FR7836529 A FR 7836529A FR 2445398 A1 FR2445398 A1 FR 2445398A1
Authority
FR
France
Prior art keywords
tube
bore
insulation
alkaline electrolyte
electroplating
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
FR7836529A
Other languages
French (fr)
Other versions
FR2445398B1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7836529A priority Critical patent/FR2445398A1/en
Publication of FR2445398A1 publication Critical patent/FR2445398A1/en
Application granted granted Critical
Publication of FR2445398B1 publication Critical patent/FR2445398B1/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
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies

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)

Abstract

A steel anode is partly surrounded by insulation and placed in the bore of the tube; and both ends of the anode outside the tube are connected to the positive pole of a d.c. supply. The negative pole of the d.c. supply is connected via at least one point near the centre of the tube so the latter forms the cathode; and an alkaline electrolyte contg. the metal to be deposited is circulated through the tube. The cathode connection is pref. made at a point located between 1/3 and 2/3 of the length of the tube. The tubes are pref. 4-40 mm dia. and 1-12 metres long; and the deposit has min. thickness (t min) at the middle of the tube, with max. thickness (t max) at both ends, where t max does not exceed 2.5 (t min).
FR7836529A 1978-12-27 1978-12-27 Electroplating the bore of long narrow metal tubes - via thin steel anode wound with insulation and placed in bore of tube, followed by pumping alkaline electrolyte through tube Granted FR2445398A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7836529A FR2445398A1 (en) 1978-12-27 1978-12-27 Electroplating the bore of long narrow metal tubes - via thin steel anode wound with insulation and placed in bore of tube, followed by pumping alkaline electrolyte through tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7836529A FR2445398A1 (en) 1978-12-27 1978-12-27 Electroplating the bore of long narrow metal tubes - via thin steel anode wound with insulation and placed in bore of tube, followed by pumping alkaline electrolyte through tube

Publications (2)

Publication Number Publication Date
FR2445398A1 true FR2445398A1 (en) 1980-07-25
FR2445398B1 FR2445398B1 (en) 1981-07-31

Family

ID=9216596

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836529A Granted FR2445398A1 (en) 1978-12-27 1978-12-27 Electroplating the bore of long narrow metal tubes - via thin steel anode wound with insulation and placed in bore of tube, followed by pumping alkaline electrolyte through tube

Country Status (1)

Country Link
FR (1) FR2445398A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550970A1 (en) * 1983-08-30 1985-03-01 Exma Mechanical/welding method of assembly, resisting corrosion, particularly of pipes, and assembly obtained by this method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR416086A (en) * 1910-05-18 1910-10-11 Alfred Sang Apparatus for galvanizing tubes, angles and other long shaped items
GB299298A (en) * 1927-10-22 1929-07-22 John Quincy Macdonald Improvement in electroplating
US1927162A (en) * 1931-02-27 1933-09-19 Research Corp Electroplating
US3645881A (en) * 1969-10-31 1972-02-29 Gen Motors Corp Rifle barrel electroplating fixture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR416086A (en) * 1910-05-18 1910-10-11 Alfred Sang Apparatus for galvanizing tubes, angles and other long shaped items
GB299298A (en) * 1927-10-22 1929-07-22 John Quincy Macdonald Improvement in electroplating
US1927162A (en) * 1931-02-27 1933-09-19 Research Corp Electroplating
US3645881A (en) * 1969-10-31 1972-02-29 Gen Motors Corp Rifle barrel electroplating fixture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550970A1 (en) * 1983-08-30 1985-03-01 Exma Mechanical/welding method of assembly, resisting corrosion, particularly of pipes, and assembly obtained by this method

Also Published As

Publication number Publication date
FR2445398B1 (en) 1981-07-31

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Legal Events

Date Code Title Description
ST Notification of lapse