EP 3332048 A1 20180613 - METHOD FOR PRODUCING A ZINC-MAGNESIUM-GALVANNEALED HOT-DIP COATING AND FLAT STEEL PRODUCT PROVIDED WITH SUCH A COATING
Title (en)
METHOD FOR PRODUCING A ZINC-MAGNESIUM-GALVANNEALED HOT-DIP COATING AND FLAT STEEL PRODUCT PROVIDED WITH SUCH A COATING
Title (de)
VERFAHREN ZUM ERZEUGEN EINES ZINK-MAGNESIUM-GALVANNEALED-SCHMELZTAUCHÜBERZUGS UND MIT EINEM SOLCHEN ÜBERZUG VERSEHENES STAHLFLACHPRODUKT
Title (fr)
PROCÉDÉ DE PRODUCTION D'UN REVÊTEMENT PAR IMMERSION À CHAUD, GALVANISÉ À BASE DE ZINC - MAGNÉSIUM ET UN PRODUIT PLAT EN ACIER DOTÉ D'UN TEL REVÊTEMENT
Publication
Application
Priority
EP 2015068177 W 20150806
Abstract (en)
[origin: WO2017020965A1] The invention provides a method for producing a Zn-Mg-galvannealed hot-dip coating with improved corrosion protection on a steel substrate and such a flat steel product. For this purpose, a) a steel substrate is provided, b) the steel substrate is hot-dip-coated in a bath of molten metal saturated with Fe, heated to 350 - 650°C and comprising (in % by weight) 0.1 - 0.16% of Al and 0.1 - 0.6% of Mg and also < 2% of Si, < 1% of either Ni or Cu, < 0.3% of Co, < 0.0001% of Mn, < 0.5% of Sr, < 0.1% in each case of Pb, B, Bi or Cd, < 0.2% of either of REM, Ti or Cr, or < 0.5% of Sn, the remainder zinc and unavoidable impurities and c) a galvannealed treatment is carried out, in which the steel substrate is kept at 450-800°C for 10-25 s, in order to produce on the steel substrate a Zn-Mg-galvannealed hot-dip coating that contains along with Zn and unavoidable impurities (in % by weight) 0.10 - 0.5% of Al, 5.0 - 15.0% of Fe, 0.10 - 0.8% of Mg and also < 2% of Si, < 1% of either Ni or Cu, < 0.3% of Co, < 0.0001% of Mn, < 0.5% of Sr, < 0.1% of either of B, Bi, Cd, Pb, < 0.2% of each of Cr, Ti or REM, < 0.01% of Sn.
IPC 8 full level
CPC (source: EP US)
C23C 2/06 (2013.01 - EP US); C23C 2/28 (2013.01 - EP US); C23C 2/40 (2013.01 - US); C22C 38/001 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C23C 2/022 (2022.08 - EP US)
Citation (search report)
See references of WO 2017020965A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2017020965 A1 20170209; CN 107849674 A 20180327; EP 3332048 A1 20180613; EP 3332048 B1 20200219; JP 2018529024 A 20181004; JP 6668453 B2 20200318; US 2019003027 A1 20190103
DOCDB simple family (application)
EP 2015068177 W 20150806; CN 201580082237 A 20150806; EP 15750686 A 20150806; JP 2018505592 A 20150806; US 201515750714 A 20150806