JPS6447889A - Method for preventing discoloration of steel sheet in continuous pickling line - Google Patents

Method for preventing discoloration of steel sheet in continuous pickling line

Info

Publication number
JPS6447889A
JPS6447889A JP20318087A JP20318087A JPS6447889A JP S6447889 A JPS6447889 A JP S6447889A JP 20318087 A JP20318087 A JP 20318087A JP 20318087 A JP20318087 A JP 20318087A JP S6447889 A JPS6447889 A JP S6447889A
Authority
JP
Japan
Prior art keywords
steel sheet
cleaning
sprayed
acid soln
pickling
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.)
Pending
Application number
JP20318087A
Other languages
Japanese (ja)
Inventor
Koichi Hirase
Nobuhiko Uesugi
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP20318087A priority Critical patent/JPS6447889A/en
Publication of JPS6447889A publication Critical patent/JPS6447889A/en
Pending 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
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
    • C23G3/029—Associated apparatus, e.g. for pretreating or after-treating for removing the pickling fluid from the objects

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)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

PURPOSE:To wet the surface of a steel sheet before the steel sheet enters a cleaning tank and to prevent the discoloration of the steel sheet by a residual acid soln. by disposing a pair of wringer roll groups between a pickling tank and cleaning tank for the steel sheet and spraying stem to the steel sheet during the passage therebetween. CONSTITUTION:The steel sheet 1 from the pickling tank 2 is sprayed with the acid soln. from acid soln. spray nozzles 9, 10 and is thereby descaled, then the steel sheet passes between the wringer roll groups 4 consisting of the wringer rolls 7, 8 at the time of removing the scale on the surfaces of the steel sheet by pickling. The steel sheet 11 subjected to the pickling treatment is subjected to squeezing away of the acid soln. sticking on both surfaces thereof by the wringer rolls 7, 8. The pickled steel sheet 12 is further sprayed with the steam from slit nozzles 11, 12 and cleaning water is sprayed thereto from nozzles 13, 14; in succession, the cleaning water is sprayed from cleaning water spray nozzles 15, 16 in a cleaning place 6 to the steel sheet. The steel sheet is taken out as the steel sheet 13 cleaned completely in the cleaning tank 3. The surface are maintained in the wet state so that the discoloration by during the course of the cleaning is thus prevented.
JP20318087A 1987-08-17 1987-08-17 Method for preventing discoloration of steel sheet in continuous pickling line Pending JPS6447889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20318087A JPS6447889A (en) 1987-08-17 1987-08-17 Method for preventing discoloration of steel sheet in continuous pickling line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20318087A JPS6447889A (en) 1987-08-17 1987-08-17 Method for preventing discoloration of steel sheet in continuous pickling line

Publications (1)

Publication Number Publication Date
JPS6447889A true JPS6447889A (en) 1989-02-22

Family

ID=16469785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20318087A Pending JPS6447889A (en) 1987-08-17 1987-08-17 Method for preventing discoloration of steel sheet in continuous pickling line

Country Status (1)

Country Link
JP (1) JPS6447889A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03188289A (en) * 1989-12-18 1991-08-16 Nkk Corp Method for preventing discoloration of strip in pickling equipment
JP2013167016A (en) * 2012-01-18 2013-08-29 Jfe Steel Corp Method for preventing yellowing of steel sheet surface after pickling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03188289A (en) * 1989-12-18 1991-08-16 Nkk Corp Method for preventing discoloration of strip in pickling equipment
JP2013167016A (en) * 2012-01-18 2013-08-29 Jfe Steel Corp Method for preventing yellowing of steel sheet surface after pickling

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