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GB781521A - Improvements in or relating to surface de-oxidising of copper-base alloys - Google Patents

Improvements in or relating to surface de-oxidising of copper-base alloys

Info

Publication number
GB781521A
GB781521A GB15406/55A GB1540655A GB781521A GB 781521 A GB781521 A GB 781521A GB 15406/55 A GB15406/55 A GB 15406/55A GB 1540655 A GB1540655 A GB 1540655A GB 781521 A GB781521 A GB 781521A
Authority
GB
United Kingdom
Prior art keywords
per cent
sodium
solution
water
cleaning medium
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
GB15406/55A
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor Co
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 Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Publication of GB781521A publication Critical patent/GB781521A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
    • C23C22/63—Treatment of copper or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/226—Non-corrosive coatings; Primers applied before welding
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Copper-base alloy parts are prepared for subsequent soldering operations by treatment first with an alkaline cleaning medium, then with a solution consisting of equal parts by volume of sulphuric acid, nitric acid and water, and then, to inhibit re-oxidation, with a solution of 0.5-16 oz. of a mixture consisting of, by weight, 65-85 per cent of sodium thiosulphate, 12-24 per cent of sodium tetraborate and 5-10 per cent of an alkyl-aryl sulphonate, in one gallon of water. The alkaline cleaning medium may be a solution based on sodium carbonate, hydroxide and phosphate, and a suitable alkyl-aryl sulphonate is sodium alkyl naphthalene sulphonate.ALSO:Copper-base alloy parts are prepared for subsequent soldering operations by treatment first with an alkaline cleaning medium, then de-oxidized by treatment with a solution consisting of equal parts by volume of sulphuric acid, nitric acid and water, and then treated, to inhibit reoxidation, with a solution of 1/2 -16 oz. of a mixture consisting of, by weight, 65-85 per cent sodium thiosulphate, 12-24 per cent sodium tetraborate and 5-10 per cent of an alky-aryl sulphonate, in one gallon of water. The alkaline cleaning medium may be a solution based on sodium carbonate, hydroxide and phosphate, and a suitable alkyl-aryl sulphonate is sodium alkyl naphthalene sulphonate.
GB15406/55A 1954-06-01 1955-05-27 Improvements in or relating to surface de-oxidising of copper-base alloys Expired GB781521A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US781521XA 1954-06-01 1954-06-01

Publications (1)

Publication Number Publication Date
GB781521A true GB781521A (en) 1957-08-21

Family

ID=22142252

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15406/55A Expired GB781521A (en) 1954-06-01 1955-05-27 Improvements in or relating to surface de-oxidising of copper-base alloys

Country Status (2)

Country Link
FR (1) FR1130066A (en)
GB (1) GB781521A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313844A (en) * 1996-06-08 1997-12-10 Reckitt & Colmann Prod Ltd Cleaning composition
ITPO20120002A1 (en) * 2012-02-09 2012-05-10 Emanuele Muto FORMULATED FOR THE ATOMIC KINETIC DEGASSIFICATION TREATMENT OF NOBLE AND PRECIOUS ELEMENTS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533886A1 (en) * 1985-04-16 1987-03-26 Kraftwerk Union Ag CLEANING PROCEDURE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313844A (en) * 1996-06-08 1997-12-10 Reckitt & Colmann Prod Ltd Cleaning composition
US5958854A (en) * 1996-06-08 1999-09-28 Reckitt & Colman Products Limited Silver polish formulation containing thiourea
ITPO20120002A1 (en) * 2012-02-09 2012-05-10 Emanuele Muto FORMULATED FOR THE ATOMIC KINETIC DEGASSIFICATION TREATMENT OF NOBLE AND PRECIOUS ELEMENTS

Also Published As

Publication number Publication date
FR1130066A (en) 1957-01-30

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