EP 2821520 B1 20201111 - METHOD FOR THE COATING OF STEEL FLAT PRODUCTS WITH A METALLIC PROTECTIVE LAYER
Title (en)
METHOD FOR THE COATING OF STEEL FLAT PRODUCTS WITH A METALLIC PROTECTIVE LAYER
Title (de)
VERFAHREN ZUM BESCHICHTEN VON STAHLFLACHPRODUKTEN MIT EINER METALLISCHEN SCHUTZSCHICHT
Title (fr)
PROCÉDÉ DE REVÊTEMENT DE PRODUITS PLATS EN ACIER AVEC UNE COUCHE DE PROTECTION MÉTALLIQUE
Publication
Application
Priority
EP 13174979 A 20130703
Abstract (en)
[origin: WO2015000707A1] The invention makes it possible to produce a flat steel product in operationally reliable manner and on an industrial scale that is protected in particularly effective manner against corrosive attacks, process in continuous feed mode, in which the flat steel product is a) provided; b) pickled; c) rinsed with an aqueous medium; d) conveyed through a flux bath that consists of an aqueous solution containing, besides unavoidable contaminants created during production and the process, 210 – 250 g/l chloride ions, and additionally 140 – 160 g/l zinc ions, 5 – 12 g/l ammonium ions or 30 – 40 g/l potassium ions and optionally in each case also 0.5 - 1.5 g/l sodium ions or calcium ions, and not more than 1 g/l magnesium ions, and traces of ions of the elements Al, Fe, Mn, Mo, Ni, P, Si, Sr and Li, wherein the density of the flux bath is at least 1.25 g/cm3 and at most 1.45 g/cm3, e) dried and warmed up to a bath entry temperature of 100 – 230 °C, f) hot dip coated in a melt bath, and g) optionally thermal, chemical or mechanical post-treated.
IPC 8 full level
CPC (source: EP US)
C23C 2/022 (2022.08 - EP US); C23C 2/024 (2022.08 - EP US); C23C 2/30 (2013.01 - EP)
Citation (examination)
- WO 9906602 A1 19990211 - ACCIAI SPECIALI TERNI SPA [IT], et al
- WO 03062476 A1 20030731 - THYSSENKRUPP ACCIAI SPECIALI [IT], et al
- EP 1396550 A1 20040310 - THYSSENKRUPP STAHL AG [DE]
- WO 2013046693 A1 20130404 - JFE STEEL CORP [JP] & EP 2762584 A1 20140806 - JFE STEEL CORP [JP]
- DE 102012101018 B3 20130314 - THYSSENKRUPP NIROSTA GMBH [DE], et al
- IRVING MELVIN BERNSTEIN ET AL: "Residual and Minor Elements in Stainless Steels", HANDBOOK OF STAINLESS STEELS, XX, XX, 1 January 1977 (1977-01-01), pages 14 - 1, XP002430954
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 2821520 A1 20150107; EP 2821520 B1 20201111; ES 2851199 T3 20210903; WO 2015000707 A1 20150108
DOCDB simple family (application)
EP 13174979 A 20130703; EP 2014062879 W 20140618; ES 13174979 T 20130703