GB795980A - Method of de-oxidizing oxidized cobalt-nickel-iron alloy surfaces - Google Patents

Method of de-oxidizing oxidized cobalt-nickel-iron alloy surfaces

Info

Publication number
GB795980A
GB795980A GB34150/55A GB3415055A GB795980A GB 795980 A GB795980 A GB 795980A GB 34150/55 A GB34150/55 A GB 34150/55A GB 3415055 A GB3415055 A GB 3415055A GB 795980 A GB795980 A GB 795980A
Authority
GB
United Kingdom
Prior art keywords
per cent
ammonium sulphate
oxidized
apart
nickel
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
GB34150/55A
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.)
Space Systems Loral LLC
Original Assignee
Philco Ford Corp
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 Philco Ford Corp filed Critical Philco Ford Corp
Publication of GB795980A publication Critical patent/GB795980A/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
    • 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
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/081—Iron or steel solutions containing H2SO4

Landscapes

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

Abstract

Oxide is removed from the surface of oxidized Co-Ni-Fe alloys by immersion in a hot bath consisting, apart from minor amounts of scavengers, activators, and inhibitors, of ammonium sulphate in aqueous sulphuric acid, the concentration of the ammonium sulphate being at least 75 gm. per 100 ml. of aqueous acid. The acid concentration is preferably 15-30 per cent by volume of 66 DEG Beaum<\>ae H2SO4; the temperature is at least 50 DEG C. and preferably 90 DEG ta 100 DEG C.; also the solution may be saturated with ammonium sulphate, the latter apparently acting as an inhibitor Alloys particularly concerned contain 5 to 25 per cent Co, 24 to 34 per cent Ni and the balance Fe apart from e.g. Mn below 1 per cent. The treatment is said to be especially useful in respect of Co-Ni-Fe alloy parts of electrical or electronic apparatus (e.g. diode pins) which have been oxidized, for example by heating to 750 DEG C. or thereabouts in a water vapour atmosphere, in order that glass may be sealed thereto; the exposed parts of the pins being subsequently treated to remove the oxide coating. The treated alloy may be vapour-, chemical-, or electro plated.
GB34150/55A 1954-12-16 1955-11-29 Method of de-oxidizing oxidized cobalt-nickel-iron alloy surfaces Expired GB795980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US475848A US2878189A (en) 1954-12-16 1954-12-16 Method of de-oxidizing metal surfaces

Publications (1)

Publication Number Publication Date
GB795980A true GB795980A (en) 1958-06-04

Family

ID=23889403

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34150/55A Expired GB795980A (en) 1954-12-16 1955-11-29 Method of de-oxidizing oxidized cobalt-nickel-iron alloy surfaces

Country Status (2)

Country Link
US (1) US2878189A (en)
GB (1) GB795980A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1220699B (en) * 1961-04-10 1966-07-07 Montedison Spa Pickling bath for stainless steel
US4666625A (en) * 1984-11-27 1987-05-19 The Drackett Company Method of cleaning clogged drains
WO2015171698A1 (en) * 2014-05-06 2015-11-12 Case Western Reserve University Alloy surface activation by immersion in aqueous acid solution

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239440A (en) * 1964-11-23 1966-03-08 Titanium Metals Corp Electrolytic pickling of titanium and titanium base alloy articles
US3625908A (en) * 1968-06-24 1971-12-07 Itek Corp Composition for cleaning photographic equipment
US4438013A (en) 1983-05-27 1984-03-20 Olin Corporation Phosphorylated and thiophosphorylated poly(oxyalkylated) hydrazines and selected adducts and their use as corrosion inhibitors

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553064A (en) * 1951-05-15 Surfacing and cleaning aluminum
BE350009A (en) * 1927-03-29
US2367811A (en) * 1941-04-19 1945-01-23 Stephen F Urban Pickling solution
US2418955A (en) * 1943-05-25 1947-04-15 Aluminum Co Of America Process of removing foreign matter from magnesium surfaces
GB608112A (en) * 1945-02-15 1948-09-09 Du Pont Improvements in or relating to the inhibition of metallic corrosion
US2694657A (en) * 1950-10-04 1954-11-16 Ekstrand & Tholand Inc Pickling ferrous metals
US2666000A (en) * 1950-10-11 1954-01-12 Standard Oil Dev Co Process for cleaning automobile radiators

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1220699B (en) * 1961-04-10 1966-07-07 Montedison Spa Pickling bath for stainless steel
US4666625A (en) * 1984-11-27 1987-05-19 The Drackett Company Method of cleaning clogged drains
WO2015171698A1 (en) * 2014-05-06 2015-11-12 Case Western Reserve University Alloy surface activation by immersion in aqueous acid solution
US10450658B2 (en) 2014-05-06 2019-10-22 Case Western Reserve University Alloy surface activation by immersion in aqueous acid solution

Also Published As

Publication number Publication date
US2878189A (en) 1959-03-17

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