EP 3508617 B1 20240327 - SURFACE-TREATED STEEL SHEET, ORGANIC RESIN-COATED STEEL SHEET, AND CONTAINER USING SAME
Title (en)
SURFACE-TREATED STEEL SHEET, ORGANIC RESIN-COATED STEEL SHEET, AND CONTAINER USING SAME
Title (de)
OBERFLÄCHENBEHANDELTES STAHLBLECH, ORGANISCHES HARZBESCHICHTETES STAHLBLECH UND BEHÄLTER DAMIT
Title (fr)
TÔLE D'ACIER TRAITÉE EN SURFACE, TÔLE D'ACIER REVÊTUE DE RÉSINE ORGANIQUE ET RÉCIPIENT L'UTILISANT
Publication
Application
Priority
- JP 2016168933 A 20160831
- JP 2017027469 W 20170728
Abstract (en)
[origin: EP3508617A1] [Problem] To provide a surface-treated steel sheet, etc. for which it is possible to restrain generation of sulfidation blackening while taking the influences of stannous oxide and stannic oxide into consideration.[Solution] The surface-treated steel sheet of the present invention includes a steel sheet, a tin plating layer formed on the steel sheet, and a chemical conversion film that is formed on the tin plating layer and contains essentially no chromium. The surface-treated steel sheet is characterized in that in measurements using anode polarization, the current density ratio of a current density I1 at a potential representing a reaction of stannous oxide (SnO) after undergoing a heat treatment equivalent to coating and baking to the sum (I1 + I2), where 12 is a current density at a potential representing a reaction of stannic oxide (SnO2), is less than 0.36.
IPC 8 full level
C23C 28/00 (2006.01); C25D 3/30 (2006.01); C25D 5/36 (2006.01); C25D 5/48 (2006.01); C25D 5/50 (2006.01); C25D 7/06 (2006.01); C25D 11/36 (2006.01)
CPC (source: EP)
C23C 28/00 (2013.01); C25D 5/48 (2013.01); C25D 11/36 (2013.01); C25D 3/30 (2013.01); C25D 5/36 (2013.01); C25D 5/505 (2013.01); C25D 7/0614 (2013.01)
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)
EP 3508617 A1 20190710; EP 3508617 A4 20200506; EP 3508617 B1 20240327; JP 2018035394 A 20180308; WO 2018042980 A1 20180308
DOCDB simple family (application)
EP 17845989 A 20170728; JP 2016168933 A 20160831; JP 2017027469 W 20170728