GB1148921A - A process for electrolytically removing scale from a metal - Google Patents

A process for electrolytically removing scale from a metal

Info

Publication number
GB1148921A
GB1148921A GB18537/66A GB1853766A GB1148921A GB 1148921 A GB1148921 A GB 1148921A GB 18537/66 A GB18537/66 A GB 18537/66A GB 1853766 A GB1853766 A GB 1853766A GB 1148921 A GB1148921 A GB 1148921A
Authority
GB
United Kingdom
Prior art keywords
metal
solution
electrodes
base
concentration
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
GB18537/66A
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.)
General Dynamics Corp
Original Assignee
General Dynamics 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 General Dynamics Corp filed Critical General Dynamics Corp
Publication of GB1148921A publication Critical patent/GB1148921A/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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating

Landscapes

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

Abstract

1,148,921. Electrolytically removing scale from metal. GENERAL DYNAMICS CORP. April27, 1966 [April 30, 1965], No.18537/66. Heading C7B. In electrolytically removing scale from metal in an electrolytic bath, the metal is free from any electrical connections and passes or remains between or alongside electrodes with the current flow between electrodes respectively on opposite sides or on the same side of the strip, the electrolyte being an aqueous solution containing a chelating acid in a concentration of from 5 to 50% by weight and a base which forms a salt therewith, the base being either a nitrogen base in a concentration such that the pH of the solution is from 3 to 7 or an alkali metal hydroxide base in a concentration such that the PH of the solution is from 3 to 6. The metal may be ferrous metal such as steel strip, e.g. ready for tinning or galvanizing. Specified chelating acids (a), nitrogen bases (b), and alkali metal hydroxides (c) are (a) citric, glycolic, diglycolic, gluconic and tartaric acids, (b) NH 4 OH and amines such as alkanol amines (e.g. ethanol amine and triethanol amine) and alkyl amines (e.g. ethylamine and triethylamine) and (c) KOH and NaOH. Possible conditions include the use of A.C. or D.C.; a current density of 100 to 1300 amps. /sq.ft.; a solution temperature of 200‹F. to the boiling point; a solution which also includes nonionic surfactants, wetting agents, ionic surfactants, corrosion inhibitors and inorganic salts as desired, and agitation or circulation of the electrolyte during descaling. Fig. 1 (not shown) illustrates the descaling of steel strip (1) between electrodes (E 1 ) and circulation of electrolyte through a filter and solution reclamation system. Fig. 7 shows segmented electrodes E 4 with removable baffles 18 between segments which prevent current movement in directions away from a metal strip 17. Figs. 8 and 9 (not shown) illustrate apparatus having baffles (21) which are hinged so as to accommodate metal strips (22 and 26) which are of different widths.
GB18537/66A 1965-04-30 1966-04-27 A process for electrolytically removing scale from a metal Expired GB1148921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45205565A 1965-04-30 1965-04-30

Publications (1)

Publication Number Publication Date
GB1148921A true GB1148921A (en) 1969-04-16

Family

ID=23794833

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18537/66A Expired GB1148921A (en) 1965-04-30 1966-04-27 A process for electrolytically removing scale from a metal

Country Status (6)

Country Link
US (1) US3420760A (en)
BE (1) BE680295A (en)
DE (1) DE1496808A1 (en)
ES (1) ES326101A1 (en)
GB (1) GB1148921A (en)
NL (1) NL6605795A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533356A1 (en) * 1982-09-22 1984-03-23 Dalic Device for radioactive decontamination of metal surfaces by electrolysis with a buffer and electrolytes which can be used for carrying out this decontamination.
EP0169825A1 (en) * 1984-06-26 1986-01-29 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Process for the superficial treatment of steel plate
US4713153A (en) * 1985-07-12 1987-12-15 N. V. Bekaert S. A. Process and apparatus for cleaning by electrochemical pickling with alternating current of specified frequency
GB2225791A (en) * 1988-12-07 1990-06-13 Chemcut Corp Electrolytic removal of protective coatings from sheets
EP0644276A1 (en) * 1993-09-17 1995-03-22 Hitachi, Ltd. A hot-rolled steel strip manufacturing and descaling method and an apparatus thereof

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970537A (en) * 1973-07-11 1976-07-20 Inland Steel Company Electrolytic treating apparatus
US4174269A (en) * 1978-06-21 1979-11-13 Ppg Industries, Inc. Method of treating electrodes
JPS5548422A (en) * 1978-09-21 1980-04-07 Sumitomo Metal Ind Ltd Electrolytic descaling method by indirect electrification system of steel wire rod and its device
FR2542766B1 (en) * 1983-03-16 1987-07-03 Cegedur METHOD AND DEVICE FOR ELECTROCHEMICAL TREATMENT OF THE SURFACE OF METALLIC PRODUCTS OF ELONGATE FORM
DE3378270D1 (en) * 1983-06-13 1988-11-24 Hoechst Ag Method and plants for the continuous unilateral anodic oxidation of aluminium bands and utilization thereof to make offset printing plates
KR890001111B1 (en) * 1983-09-07 1989-04-24 미쯔비시주우고오교오 가부시기가이샤 Method and apparatus for continuous electroplating of alloys
EP0202870A1 (en) * 1985-05-17 1986-11-26 David Reznik Apparatus and method for anodic treatment
ATE45598T1 (en) * 1986-10-20 1989-09-15 Clecim Sa METHOD AND DEVICE FOR THE ELECTROLYTIC TREATMENT OF METALLIC STRIPS.
AT406385B (en) * 1996-10-25 2000-04-25 Andritz Patentverwaltung METHOD AND DEVICE FOR ELECTROLYTICALLY STICKING METAL STRIPS
JP4057786B2 (en) * 1999-01-26 2008-03-05 新日本製鐵株式会社 Steel material scale removal and control method and apparatus
DE102005008939A1 (en) * 2005-02-26 2006-09-21 Sms Demag Ag Method and device for reeling a metal strip
DE102008057151A1 (en) * 2008-11-13 2010-05-27 Henkel Ag & Co. Kgaa Process for producing an electrolytically galvanized high strength steel sheet
TWI487816B (en) * 2012-10-24 2015-06-11 Zen Material Technologies Inc Alkaline electrolysis derusting method
DE102013201883A1 (en) * 2013-02-05 2014-08-07 Urs Brodbeck Treatment fluid for cleaning an implant part
ES2724850T3 (en) 2012-11-14 2019-09-16 Zyfoma Gmbh Treatment element for use with a part of a dental implant, treatment system and procedure for cleaning a part of a dental implant
DE102013201884A1 (en) 2013-02-05 2014-08-07 Urs Brodbeck Treatment system for cleaning a biofilm-contaminated component, in particular an implant part
DE102013201885A1 (en) 2013-02-05 2014-08-07 Urs Brodbeck Ceramic body, in particular for use in a bone implant, in particular as a dental implant
DE102017223633A1 (en) * 2017-12-21 2019-06-27 Voestalpine Stahl Gmbh Cold-rolled flat steel product with metallic anticorrosion layer and method for producing the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2146488A (en) * 1934-07-30 1939-02-07 Inland Steel Co Apparatus for electrolytically pickling metal
US2165326A (en) * 1934-10-30 1939-07-11 Hanson Van Winkle Munning Co Electrolytic treatment of ferrous metals
US2685564A (en) * 1949-06-25 1954-08-03 Detrex Corp Electrolytic cleaning process
GB1082410A (en) * 1963-12-26 1967-09-06 Mitsubishi Heavy Ind Ltd An electrolytic descaling method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533356A1 (en) * 1982-09-22 1984-03-23 Dalic Device for radioactive decontamination of metal surfaces by electrolysis with a buffer and electrolytes which can be used for carrying out this decontamination.
EP0169825A1 (en) * 1984-06-26 1986-01-29 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Process for the superficial treatment of steel plate
US4713153A (en) * 1985-07-12 1987-12-15 N. V. Bekaert S. A. Process and apparatus for cleaning by electrochemical pickling with alternating current of specified frequency
GB2225791A (en) * 1988-12-07 1990-06-13 Chemcut Corp Electrolytic removal of protective coatings from sheets
GB2225791B (en) * 1988-12-07 1993-07-28 Chemcut Corp Process and apparatus for electrolytically removing protective layers from printed circuit boards
EP0644276A1 (en) * 1993-09-17 1995-03-22 Hitachi, Ltd. A hot-rolled steel strip manufacturing and descaling method and an apparatus thereof

Also Published As

Publication number Publication date
BE680295A (en) 1966-10-31
NL6605795A (en) 1966-10-31
DE1496808A1 (en) 1970-09-10
ES326101A1 (en) 1967-07-01
US3420760A (en) 1969-01-07

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