GB1299850A - Repair of chromium plated surfaces - Google Patents

Repair of chromium plated surfaces

Info

Publication number
GB1299850A
GB1299850A GB57475/70A GB5747570A GB1299850A GB 1299850 A GB1299850 A GB 1299850A GB 57475/70 A GB57475/70 A GB 57475/70A GB 5747570 A GB5747570 A GB 5747570A GB 1299850 A GB1299850 A GB 1299850A
Authority
GB
United Kingdom
Prior art keywords
chromium
nickel
deposited
band
defective area
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.)
Expired
Application number
GB57475/70A
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.)
Sifco Industries Inc
Original Assignee
Sifco 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 Sifco Industries Inc filed Critical Sifco Industries Inc
Publication of GB1299850A publication Critical patent/GB1299850A/en
Expired 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
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment
    • 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
    • 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
    • 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
    • C25D5/67—Electroplating to repair workpiece
    • 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
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium

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

1299850 Electrolytic repair of chromium plated surfaces SIFCO INDUSTRIES INC 3 Dec 1970 [31 Dec 1969] 57475/70 Heading C7B A defective area in a chromium plated surface is repaired by a process comprising the sequential steps of mechanical cleaning, electrolytic cleaning, electrolytic activation, and electro-plating first with nickel and thereafter with chromium; in which a band of chromium is electrolytically removed from the chromium plated surface bordering the perimeter of the defective area, nickel is deposited over the defective area and an adjacent part of the band from which the chromium has been removed, and the chromium is deposited over the defective area, the band and an adjacent portion of the originally deposited chromium plate. The nickel may be a duplex coating comprising a layer of dull nickel followed by a layer of bright nickel. If necessary, copper may be deposited prior to the nickel. All electro-plating steps may be carried out using brush plating tools, that for the chromium deposition comprising a lead electrode and a ¢" thick polyester fabric or fibre pad covered with a polyester gauze; and that used for the other processes comprising a graphite electrode having a porous cotton tip covered by cotton gauze. In the example given the electrolytes used for cleaning the surface and for stripping the chromium band comprise sodium hydroxide and sodium metasilicate, and for activation comprises sulphuric acid. Copper is deposited from an aqueous solution of copper cyanide, potassium cyanide and potassium hydroxide; dull nickel is deposited from a bath including nickel sulphate and citric acid; bright nickel from a bath including saccharin; and chromium from a bath containing hexavalent chromium ions, e.g. prepared from chromic acid, sulphuric acid, trivalent chromium, trichloroacetic acid, and sodium hydroxide.
GB57475/70A 1969-12-31 1970-12-03 Repair of chromium plated surfaces Expired GB1299850A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88967669A 1969-12-31 1969-12-31

Publications (1)

Publication Number Publication Date
GB1299850A true GB1299850A (en) 1972-12-13

Family

ID=25395576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB57475/70A Expired GB1299850A (en) 1969-12-31 1970-12-03 Repair of chromium plated surfaces

Country Status (7)

Country Link
US (1) US3616285A (en)
AU (1) AU2304270A (en)
CA (1) CA925815A (en)
DE (1) DE2063632A1 (en)
FR (1) FR2074505A5 (en)
GB (1) GB1299850A (en)
ZA (1) ZA708205B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502924A (en) * 1981-09-01 1985-03-05 Nippon Steel Corporation Method for repairing a mold for continuous casting of steel
GB2192642A (en) * 1986-07-19 1988-01-20 Ae Plc Electro deposition
CN100344797C (en) * 2004-09-20 2007-10-24 南京飞燕活塞环股份有限公司 Ball iron ring chrome-plating technology and plating liquid thereof

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023266A (en) * 1976-07-26 1977-05-17 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Process for preparing liquid metal electrical contact device
IT1215386B (en) * 1987-03-18 1990-02-08 Danieli Off Mecc RECOVERY PROCEDURE FOR CRYSTALLIZER OF LINGOTTIERA FOR CONTINUOUS CASTING.
DE19548198C2 (en) * 1995-12-22 1999-05-12 Hueck Engraving Gmbh Method and device for reworking and / or repairing small surface damage in a large-format press plate or an endless belt made of sheet metal with a structured surface for embossing plastic-coated wood-based panels or laminate panels
GB2336161B (en) 1998-04-06 2003-03-26 John Michael Lowe Method of providing conductive tracks on a printed circuit and apparatus for use in carrying out the method
US6939447B2 (en) 1998-04-06 2005-09-06 Tdao Limited Method of providing conductive tracks on a printed circuit and apparatus for use in carrying out the method
US7160427B2 (en) * 2004-07-19 2007-01-09 Pratt & Whitney Canada Corp. In situ plating of electrical connector contacts
US7354336B1 (en) 2006-10-12 2008-04-08 Pratt & Whitney Canada Corp. Abrading tool and method for refurbishing electrical connector pin contacts
CN101280439B (en) * 2008-01-09 2010-07-14 西安理工大学 Bright brush plating nano-chromium solution and preparation thereof
KR101353264B1 (en) * 2012-05-31 2014-01-27 현대자동차주식회사 Plating method using a etching process of laser
CN103409779B (en) * 2013-07-26 2016-06-01 中国矿业大学 Method for preparing super-hydrophobic surface by nano composite brush plating

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502924A (en) * 1981-09-01 1985-03-05 Nippon Steel Corporation Method for repairing a mold for continuous casting of steel
GB2192642A (en) * 1986-07-19 1988-01-20 Ae Plc Electro deposition
GB2192642B (en) * 1986-07-19 1990-12-19 Ae Plc Process for the deposition of bearing alloys
CN100344797C (en) * 2004-09-20 2007-10-24 南京飞燕活塞环股份有限公司 Ball iron ring chrome-plating technology and plating liquid thereof

Also Published As

Publication number Publication date
AU2304270A (en) 1972-06-08
CA925815A (en) 1973-05-08
US3616285A (en) 1971-10-26
ZA708205B (en) 1971-09-29
FR2074505A5 (en) 1971-10-01
DE2063632A1 (en) 1971-07-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees