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GB612419A - Processes for removing oxide from the surfaces of metals and alloys - Google Patents

Processes for removing oxide from the surfaces of metals and alloys

Info

Publication number
GB612419A
GB612419A GB13705/45A GB1370545A GB612419A GB 612419 A GB612419 A GB 612419A GB 13705/45 A GB13705/45 A GB 13705/45A GB 1370545 A GB1370545 A GB 1370545A GB 612419 A GB612419 A GB 612419A
Authority
GB
United Kingdom
Prior art keywords
alloys
metals
metal
removing oxide
alkali
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
GB13705/45A
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.)
Occidental Chemical Corp
Original Assignee
Hooker Electrochemical 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 Hooker Electrochemical Co filed Critical Hooker Electrochemical Co
Publication of GB612419A publication Critical patent/GB612419A/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
    • C23G1/28—Cleaning or pickling metallic material with solutions or molten salts with molten salts

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)
  • Chemical Treatment Of Metals (AREA)
  • ing And Chemical Polishing (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

A process for removing oxide from the surfaces of metals and alloys which are resistant to fused caustic alkali (e.g. the ferrous metals, copper, and their alloys), comprises subjecting the oxide coating to the action of a fused bath of caustic alkali containing 1-20 per cent of an oxidizing agent stable therewith, at between 300 DEG C. and 600 DEG C. for not less than 1 minute (without the application of an externally generated electric current) and then subjecting it to the action of a weak aqueous inorganic acid having no oxidizing effect on the metal e.g. dilute hydrochloric, sulphuric or nitric acids. The oxidizing agent may be one or more of the alkali metal or alkali earth nitrates, chlorates, peroxides, dichromates, manganates or permanganates, those preferred being sodium nitrate or chlorate, or potassium chlorate, and the preferred amount thereof being 5-15 per cent. The process may be applied a second time to a metal oxidized during an annealing process, and is said to be particularly suitable for removing oxide from the surfaces of iron, nickel and cobalt and their alloys with each other and with chromium, manganese, molybdenum, tungsten, vanadium and copper. Specification 466,661 is referred to. Reference has been directed by the Comptroller to Specification 464,982.
GB13705/45A 1944-06-02 1945-05-31 Processes for removing oxide from the surfaces of metals and alloys Expired GB612419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US538538A US2395694A (en) 1944-06-02 1944-06-02 Processes for removing oxide from the surface of metals

Publications (1)

Publication Number Publication Date
GB612419A true GB612419A (en) 1948-11-12

Family

ID=24147320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13705/45A Expired GB612419A (en) 1944-06-02 1945-05-31 Processes for removing oxide from the surfaces of metals and alloys

Country Status (4)

Country Link
US (2) US2395694A (en)
BE (1) BE476664A (en)
FR (1) FR945530A (en)
GB (1) GB612419A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120682A (en) * 1982-04-23 1983-12-07 Stephanois Rech Mec Improving the corrosion resistance of ferrous metal parts by molten salt bath treatment to remove sulphur; filtering molten salts

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458661A (en) * 1944-01-29 1949-01-11 J H Shoemaker Process of cleaning metal surfaces and compositions therefor
US2678289A (en) * 1944-06-02 1954-05-11 Pottberg Rolfe Metal surface treatment
US2538702A (en) * 1944-06-02 1951-01-16 Freeport Sulphur Co Metal surface cleaning
BE471083A (en) * 1945-07-31
US2569158A (en) * 1946-02-21 1951-09-25 United States Steel Corp Method of removing scale from ferrous articles
US2488108A (en) * 1946-08-02 1949-11-15 Pennsylvania Salt Mfg Co Stainless steel pickling
US2678290A (en) * 1946-09-05 1954-05-11 Pottberg Rolfe Process of removing surface oxide films on metal
US2567456A (en) * 1947-04-07 1951-09-11 J H Shoemaker Metal cleaning composition and process
US2676900A (en) * 1947-07-08 1954-04-27 Hooker Electrochemical Co Processes for removal of oxides from the surface of metals
US2630393A (en) * 1948-06-25 1953-03-03 Charles B Francis Method of cleaning and descaling ferrous bodies
US2641559A (en) * 1948-09-08 1953-06-09 United States Steel Corp Method of cleaning and descaling ferrous articles and a bath therefor
US2567835A (en) * 1949-08-29 1951-09-11 Dow Chemical Co Removing copper-containing incrustations from steam generators
US2671717A (en) * 1950-08-29 1954-03-09 Gen Electric Chemical brightening of aluminum
US2738294A (en) * 1951-09-13 1956-03-13 Diamond Alkali Co Salt bath system and method for treating metals
US2738293A (en) * 1952-07-25 1956-03-13 Diamond Alkali Co Salt bath system and method for treating metals
US2809103A (en) * 1953-11-10 1957-10-08 Sylvania Electric Prod Fabrication of semiconductor elements
US2726970A (en) * 1954-06-01 1955-12-13 Ford Motor Co Deoxidizing copper base metal parts
US2931778A (en) * 1954-09-28 1960-04-05 Diamond Alkali Co Alkaline composition
US3030239A (en) * 1957-10-24 1962-04-17 Hooker Chemical Corp Process and salt for descaling of metals
US3020175A (en) * 1958-06-12 1962-02-06 Gen Dynamics Corp Chemical cleaning of printed circuits
US3025189A (en) * 1958-12-10 1962-03-13 Purex Corp Ltd Composition and process for removing heat scale from metal parts
US3096261A (en) * 1959-05-25 1963-07-02 Hooker Chemical Corp Salt bath for electrolytic cleaning of metals
US3043712A (en) * 1959-05-27 1962-07-10 Gil Mfg Company Method of porcelain enameling ferrous metal and product
US3011923A (en) * 1960-02-19 1961-12-05 Charles O Coffer Surface treatment of molybdenum metal
US3457107A (en) * 1965-07-20 1969-07-22 Diversey Corp Method and composition for chemically polishing metals
US3646946A (en) * 1969-01-06 1972-03-07 Olin Mathieson Copper alloy cleaning process
US3728155A (en) * 1969-01-06 1973-04-17 Olin Corp Copper alloy cleaning process
JPS5534233B2 (en) * 1973-03-01 1980-09-05
US6203691B1 (en) 1998-09-18 2001-03-20 Hoffman Industries International, Ltd. Electrolytic cleaning of conductive bodies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120682A (en) * 1982-04-23 1983-12-07 Stephanois Rech Mec Improving the corrosion resistance of ferrous metal parts by molten salt bath treatment to remove sulphur; filtering molten salts

Also Published As

Publication number Publication date
BE476664A (en)
US2395694A (en) 1946-02-26
FR945530A (en) 1949-05-06
USRE22887E (en) 1947-06-03

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