EP 0972854 B1 20050504 - Process for pickling stainless steel
Title (en)
Process for pickling stainless steel
Title (de)
Verfahren zum Beizen von Edelstahl
Title (fr)
Procédé de dècapage d'acier inoxydable
Publication
Application
Priority
AT 121798 A 19980715
Abstract (en)
[origin: EP0972854A2] A special steel pickling process, employing a hot aqueous hydrochloric acid solution, is new. A special steel pickling process uses an aqueous hydrochloric acid solution at ≥ 40 degrees C. Preferred Features: The solution contains one or more oxidizing agents selected from nitric acid, chlorine, hydrogen peroxide, chlorine-oxygen compounds, other chlorine-containing acids (e.g. perchloric acid), chromium-oxygen compounds (e.g. CrO3) and ferric chloride, in amount such that at least half of the dissolved metal is in the form of ferric chloride.
IPC 1-7
IPC 8 full level
CPC (source: EP KR US)
Designated contracting state (EPC)
BE DE ES FI FR IT SE
DOCDB simple family (publication)
EP 0972854 A2 20000119; EP 0972854 A3 20000719; EP 0972854 B1 20050504; AT 407755 B 20010625; AT A121798 A 20001015; DE 59912005 D1 20050609; ES 2242330 T3 20051101; KR 100592567 B1 20060626; KR 20000011310 A 20000225; TW 475008 B 20020201; US 6250314 B1 20010626
DOCDB simple family (application)
EP 99111754 A 19990618; AT 121798 A 19980715; DE 59912005 T 19990618; ES 99111754 T 19990618; KR 19990022557 A 19990616; TW 88108564 A 19990525; US 35377699 A 19990715