(19)
(11) EP 1 409 756 A1

(12)

(43) Date of publication:
21.04.2004 Bulletin 2004/17

(21) Application number: 02743117.0

(22) Date of filing: 28.05.2002
(51) International Patent Classification (IPC)7: C22C 19/05, C22C 38/44, C23F 13/00
(86) International application number:
PCT/EP2002/005842
(87) International publication number:
WO 2002/101106 (19.12.2002 Gazette 2002/51)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 08.06.2001 DE 10128032

(71) Applicant: Outokumpu Oyj
02201 Espoo (FI)

(72) Inventors:
  • DAUM, Karl-Heinz
    65205 Wiesbaden (DE)
  • RAUSER, Wolf-Christoph
    60439 Frankfurt am Main (DE)
  • ANASTASIJEVIC, Nikola
    63674 Altenstadt (DE)
  • SCHALK, Wolfram
    61267 Neu-Anspach (DE)
  • LAIBACH, Stefan
    36419 Geismar/Rhön (DE)
  • SCHNAUBELT, Herbert
    61184 Karben (DE)

(74) Representative: KEIL & SCHAAFHAUSEN 
Patentanwälte,Cronstettenstrasse 66
60322 Frankfurt am Main
60322 Frankfurt am Main (DE)

   


(54) METHOD FOR THE PROTECTION AGAINST CORROSION OF A STEEL PART MADE OF AUSTENITIC OR SEMI-AUSTENITIC STEEL DURING THE PRODUCTION OF SULFURIC ACID