EP 2978879 B1 20171108 - METHOD FOR TREATING IN CONTINUOUS THE SURFACE OF A LAMINATE MADE OF STAINLESS STEEL IN A SOLUTION BASED ON SULFURIC ACID
Title (en)
METHOD FOR TREATING IN CONTINUOUS THE SURFACE OF A LAMINATE MADE OF STAINLESS STEEL IN A SOLUTION BASED ON SULFURIC ACID
Title (de)
VERFAHREN ZUR KONTINUIERLICHEN BEHANDLUNG DER OBERFLÄCHE EINES LAMINATS AUS ROSTFREIEM STAHL IN EINER LÖSUNG AUF BASIS VON SCHWEFELSÄURE
Title (fr)
PROCÉDÉ DE TRAITEMENT EN CONTINU DE LA SURFACE D'UN STRATIFIÉ EN ACIER INOXYDABLE DANS UNE SOLUTION À BASE D'ACIDE SULFURIQUE
Publication
Application
Priority
- IT MI20130493 A 20130329
- IB 2014060230 W 20140327
Abstract (en)
[origin: WO2014155341A1] The present invention refers to a method for treating in continuous the surface of a laminate made of stainless steel that comprises at least the steps of: (a) making said laminate (11) pass in continuous in a tank (12) containing an aqueous electrolytic solution (SE) of sulfuric acid, said laminate (11) passing between at least two electrodes (150, 170) immersed in said electrolytic solution (SE) and arranged in a direction substantially parallel to the movement direction of the laminate (11) and having a length Le measured along said direction, said electrodes (150, 170) facing the opposite faces of said laminate (11) and being arranged in a position facing each other, (b) subjecting said laminate (11) to an electrolytic pickling treatment by applying an alternating current having a frequency f comprised between 5 Hz and 150 Hz, said frequency f being correlated to said forward velocity v of the laminate (11) and to said length Le of said electrodes (150, 170) by the relation F ≥ (A*v)/Le, where A is a rational number greater than 1, preferably greater than 2; (c) subjecting said electrolytically pickled laminate (11) to a surface finishing and a surface passivation treatment.
IPC 8 full level
CPC (source: EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2014155341 A1 20141002; BR 112015020701 A2 20170718; BR 112015020701 B1 20210824; CN 105143523 A 20151209; CN 105143523 B 20180619; EP 2978879 A1 20160203; EP 2978879 B1 20171108; IT MI20130493 A1 20140930
DOCDB simple family (application)
IB 2014060230 W 20140327; BR 112015020701 A 20140327; CN 201480018121 A 20140327; EP 14722742 A 20140327; IT MI20130493 A 20130329