EP 3146091 B1 20190821 - METHOD FOR MANUFACTURING CHROMIUM-CHROMIUM OXIDE COATED SUBSTRATES
Title (en)
METHOD FOR MANUFACTURING CHROMIUM-CHROMIUM OXIDE COATED SUBSTRATES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON CHROM-CHROMOXID BESCHICHTETEN SUBSTRATEN
Title (fr)
PROCÉDÉ DE FABRICATION DE SUBSTRATS REVÊTUS D'OXYDE CHROMIUM-CHROMIUM
Publication
Application
Priority
- EP 14169277 A 20140521
- EP 2015061333 W 20150521
Abstract (en)
[origin: WO2015177315A1] The present invention relates to a method for manufacturing a chromium metal - chromium oxide coated substrate by electrolytically depositing a plurality of chromium metal - chromium oxide coating layers on an electrically conductive substrate from an electrolyte solution that comprises a trivalent chromium compound and a chelating agent, wherein the electrolyte solution is free of chloride ions and of a boric acid buffering agent, wherein the electrically conductive substrate acts as a cathode, and wherein an anode comprising a catalytic coating of iridium oxide or a mixed metal oxide or a hydrogen gas diffusion anode is chosen for reducing or eliminating the oxidation of Cr(III)-ions to Cr(VI)-ions, wherein during the deposition of a chromium metal - chromium oxide layer hydrogen bubbles are formed at the strip surface, and wherein between the deposition of the chromium metal - chromium oxide layers, the hydrogen bubbles are removed from the surface of the strip.
IPC 8 full level
C25D 5/50 (2006.01); C25D 3/06 (2006.01); C25D 5/14 (2006.01); C25D 9/08 (2006.01); C25D 9/10 (2006.01)
CPC (source: EP US)
C25D 5/14 (2013.01 - EP US); C25D 5/505 (2013.01 - EP); C25D 5/617 (2020.08 - EP US); C25D 5/623 (2020.08 - EP US); C25D 5/627 (2020.08 - EP US); C25D 9/08 (2013.01 - EP); C25D 3/06 (2013.01 - EP); C25D 9/10 (2013.01 - 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 2015177315 A1 20151126; EP 3146091 A1 20170329; EP 3146091 B1 20190821; ES 2744566 T3 20200225; RS 59292 B1 20191031
DOCDB simple family (application)
EP 2015061333 W 20150521; EP 15726901 A 20150521; ES 15726901 T 20150521; RS P20191121 A 20150521