EP 1472388 B1 20110713 - METHOD FOR PICKLING MARTENSITIC OR FERRITIC HIGH-GRADE STEEL
Title (en)
METHOD FOR PICKLING MARTENSITIC OR FERRITIC HIGH-GRADE STEEL
Title (de)
VERFAHREN ZUM BEIZEN VON MARTENSITISCHEM ODER FERRITISCHEM EDELSTAHL
Title (fr)
PROCEDE POUR ATTAQUER L'ACIER INOXYDABLE MARTENSITIQUE OU FERRITIQUE
Publication
Application
Priority
- DE 10160318 A 20011207
- EP 0213415 W 20021128
Abstract (en)
[origin: US7229506B2] A process for pickling martensitic or ferritic stainless steel, preferably in the form of wires, tubes or rods, wherein the stainless steel is placed in contact with a pickling solution which has a temperature in the range 15 to 29° C. and contains 50 to 120 g/l of free sulfuric acid, 5 to 40 g/l of free HF and 5 to 40 g/l of Fe(III) ions. Such pickling may be incorporated into a sequential process, wherein the stainless steel is a) subjected to a treatment during which the oxidic coating is applied, preferably sand-blasting or metal-blasting, treatment with a molten salt or treatment with an aqueous permanganate/alkali metal hydroxide solution, b) pickled in accordance with the aforedescribed process, and c) post-treated with a passivating solution.
IPC 8 full level
C23G 1/08 (2006.01)
CPC (source: EP KR US)
C23C 22/06 (2013.01 - EP US); C23C 22/10 (2013.01 - EP US); C23G 1/00 (2013.01 - EP US); C23G 1/08 (2013.01 - KR); C23G 1/086 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03048418 A2 20030612; WO 03048418 A3 20040826; AT E516386 T1 20110715; DE 10160318 A1 20030618; EP 1472388 A2 20041103; EP 1472388 B1 20110713; ES 2367424 T3 20111103; KR 100926924 B1 20091117; KR 20040083468 A 20041002; PT 1472388 E 20110908; US 2005016634 A1 20050127; US 7229506 B2 20070612
DOCDB simple family (application)
EP 0213415 W 20021128; AT 02785414 T 20021128; DE 10160318 A 20011207; EP 02785414 A 20021128; ES 02785414 T 20021128; KR 20047008715 A 20021128; PT 02785414 T 20021128; US 86091104 A 20040604