GB1098715A - Method of descaling stainless steels - Google Patents

Method of descaling stainless steels

Info

Publication number
GB1098715A
GB1098715A GB34300/66A GB3430066A GB1098715A GB 1098715 A GB1098715 A GB 1098715A GB 34300/66 A GB34300/66 A GB 34300/66A GB 3430066 A GB3430066 A GB 3430066A GB 1098715 A GB1098715 A GB 1098715A
Authority
GB
United Kingdom
Prior art keywords
stainless steels
nitrate
sodium
descaling stainless
solution
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
GB34300/66A
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of GB1098715A publication Critical patent/GB1098715A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C25F1/06—Iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • B23H3/08—Working media

Abstract

Stainless steels are descaled by electrolytically treating in an aqueous solution comprising at least 2% of one or more of sodium or potassium sulphate or nitrate, with or without 0.1-10% soluble fluoride e.g. NaF as accelerator and less than 10% tartaric or citric acid as complex-salt former, then pickling in e.g. by immersing in or spraying with a solution comprising 6.5-15% FeCl3 and 5-10% nitric acid or one or more nitrates such as ferric and sodium nitrate (calculated as NO3).
GB34300/66A 1965-07-30 1966-07-29 Method of descaling stainless steels Expired GB1098715A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4627865 1965-07-30

Publications (1)

Publication Number Publication Date
GB1098715A true GB1098715A (en) 1968-01-10

Family

ID=12742747

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34300/66A Expired GB1098715A (en) 1965-07-30 1966-07-29 Method of descaling stainless steels

Country Status (3)

Country Link
US (1) US3429792A (en)
AT (1) AT265808B (en)
GB (1) GB1098715A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276133A (en) * 1978-09-21 1981-06-30 Sumitomo Industries, Ltd. Method for continuous electrolytic descaling of steel wire by non-contact current flow
GB2220005A (en) * 1988-06-28 1989-12-28 Borsodi Vegyi Komb Process for removing oxide layer and scale from metals and metal alloys

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE409474B (en) * 1975-05-13 1979-08-20 Wennborg Ab C J SEE CONTINUOUS AND DISCONTINUAL ELECTROCHEMIC CLEANING OF ALLOY STEELS, SPECIAL STAINLESS STEEL IN THE FORM OF BANDS, BARS, PROFILES, THREADS, RODS AND PIECES WITH SURFACES AND LOSS
US3975245A (en) * 1975-12-05 1976-08-17 United Technologies Corporation Electrolyte for electrochemical machining of nickel base superalloys
US4012299A (en) * 1976-04-01 1977-03-15 Allegheny Ludlum Industries, Inc. Metallic descaling system
US4174269A (en) * 1978-06-21 1979-11-13 Ppg Industries, Inc. Method of treating electrodes
IT1225255B (en) * 1982-09-21 1990-11-05 Italimpianti CONTINUOUS ANNEALING METHOD OF STEEL SHEET TAPES AND CONTINUOUS ANNEALING LINE FOR THE IMPLEMENTATION OF SUCH METHOD
US4713154A (en) * 1985-08-08 1987-12-15 Kawasaki Steel Corporation Continuous annealing and pickling method and apparatus for steel strips
US5292374A (en) * 1988-11-15 1994-03-08 Maschinenfabrik Andritz Actiengesellschft Process and plant for pickling stainless steel strip
US5675880A (en) * 1996-08-29 1997-10-14 Bethlehem Steel Corporation Descaling system for use in the manufacture of steel and corresponding method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112341C (en) *
US1337718A (en) * 1918-09-03 1920-04-20 Western Electric Co Cleansing of ferrous and non-ferrous metals
US2565189A (en) * 1949-03-15 1951-08-21 Du Pont Electropolishing steel
US2915444A (en) * 1955-12-09 1959-12-01 Enthone Process for cleaning and plating ferrous metals
FR1226856A (en) * 1958-12-23 1960-08-16 Alloy steels pickling process
GB1082410A (en) * 1963-12-26 1967-09-06 Mitsubishi Heavy Ind Ltd An electrolytic descaling method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276133A (en) * 1978-09-21 1981-06-30 Sumitomo Industries, Ltd. Method for continuous electrolytic descaling of steel wire by non-contact current flow
GB2220005A (en) * 1988-06-28 1989-12-28 Borsodi Vegyi Komb Process for removing oxide layer and scale from metals and metal alloys

Also Published As

Publication number Publication date
AT265808B (en) 1968-10-25
US3429792A (en) 1969-02-25

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