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1. WO1989008729 - PROCESS FOR PICKLING ELECTRICAL STEEL SHEET

Publication Number WO/1989/008729
Publication Date 21.09.1989
International Application No. PCT/JP1989/000260
International Filing Date 09.03.1989
IPC
C23G 1/08 2006.01
CCHEMISTRY; METALLURGY
23COATING 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
GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
1Cleaning or pickling metallic material with solutions or molten salts
02with acid solutions
08Iron or steel
CPC
C23G 1/08
CCHEMISTRY; METALLURGY
23COATING 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
GCLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
1Cleaning or pickling metallic material with solutions or molten salts
02with acid solutions
08Iron or steel
Applicants
  • NKK CORPORATION [JP]/[JP] (AllExceptUS)
  • NISHIMOTO, Akihiko [JP]/[JP] (UsOnly)
  • HOSOYA, Yoshihiro [JP]/[JP] (UsOnly)
  • TOMITA, Kunikazu [JP]/[JP] (UsOnly)
  • URABE, Toshiaki [JP]/[JP] (UsOnly)
  • JITSUKAWA, Masaharu [JP]/[JP] (UsOnly)
Inventors
  • NISHIMOTO, Akihiko
  • HOSOYA, Yoshihiro
  • TOMITA, Kunikazu
  • URABE, Toshiaki
  • JITSUKAWA, Masaharu
Agents
  • YOSHIHARA, Shozo @
Priority Data
63/5477110.03.1988JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) PROCESS FOR PICKLING ELECTRICAL STEEL SHEET
(FR) PROCEDE DE DECAPAGE D'UNE FEUILLE D'ACIER ELECTRIQUE
Abstract
(EN)
A process for pickling an electrical steel sheet, which can provide an electrical steel sheet having an excellent surface state without requiring any special works and causing and increase in cost, and which comprises pickling a hot-rolled steel sheet with hydrochloric acid for a pickling time determined based on the amount of silicon in the steel sheet, the temperature of pickling solutoin, etc. taking into consideration not only descaling but also erosion of grain boundary as well.
(FR)
Procédé de décapage d'une feuille d'acier électrique, permettant d'obtenir une feuille d'acier électrique présentant une excellente surface sans qu'il soit nécessaire d'effectuer un usinage particulier, qui serait à l'origine d'une augmentation des coûts. Ce procédé consiste à décaper une feuille d'acier laminée à chaud avec de l'acide chlorhydrique pendant un temps de décapage déterminé en fonction de la quantité de silicium dans la feuille d'acier, de la température de la solution de décapage, etc., et en tenant compte non seulement du décalaminage mais également de l'érosion de la frontière du grain.
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