EP 0545230 B2 20030312 - Process for preparing modified oxide ceramic coatings on barrier-layer metals.
Title (en)
Process for preparing modified oxide ceramic coatings on barrier-layer metals.
Title (de)
Verfahren zur Erzeugung von ggf. modifizierten Oxidkeramikschichten auf sperrschichtbildenden Metallen.
Title (fr)
Procédé de préparation d'une couche d'oxyde céramique modifiée sur des métaux formant couche barrière.
Publication
Application
Priority
DE 4139006 A 19911127
Abstract (en)
[origin: EP0545230A1] In order to enhance the thickness and wear resistance of oxide-ceramic coatings on barrier-layer metals, a plasmachemical anodic oxidation in a chloride-free electrolyte bath is carried out at a pH from 2 to 8 and constant bath temperature, using a constant current density of at least 1 A/dm<2>, until the voltage settles at a final value. Thus it is possible to generate, on objects made of aluminium or aluminium alloys, an oxide-ceramic coating which consists of corundum, and even on magnesium or titanium, coating thicknesses of up to 150 mu m are achieved.
IPC 1-7
IPC 8 full level
C25D 11/02 (2006.01); C25D 11/04 (2006.01); C25D 11/06 (2006.01); C25D 11/26 (2006.01); C25D 11/30 (2006.01); C25D 11/34 (2006.01)
CPC (source: EP US)
C25D 11/026 (2013.01 - EP US); C25D 11/04 (2013.01 - EP US); C25D 11/26 (2013.01 - EP US); C25D 11/30 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0545230 A1 19930609; EP 0545230 B1 19950628; EP 0545230 B2 20030312; AT E124472 T1 19950715; DE 4139006 A1 19930603; DE 4139006 C2 19961024; DE 4139006 C3 20030710; DE 59202722 D1 19950803; JP 2912101 B2 19990628; JP H05239692 A 19930917; US 5385662 A 19950131; US 5811194 A 19980922
DOCDB simple family (application)
EP 92120006 A 19921125; AT 92120006 T 19921125; DE 4139006 A 19911127; DE 59202722 T 19921125; JP 34129492 A 19921127; US 66226596 A 19960607; US 98209292 A 19921125