Abstract

The present invention relates to a process for providing an aluminium article with a copper coating, comprising a first step of anodizing said aluminium article to produce an anodic oxide layer on the surface thereof; and a second step of colouring the anodized aluminium surface in an electrolytic bath containing a copper salt by subjecting the aluminium surface to an asymmetrical voltage controlled alternating block current having a positive phase and a negative phase, such that a metallic copper coloured coating is formed. The invention also relates to aluminium articles, provided with a copper coating, obtainable by said process.

IPC Classes  ?

• C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
• C25D 5/18 - Electroplating using modulated, pulsed or reversing current
• C25D 11/14 - Producing integrally coloured layers
• C25D 11/22 - Electrolytic after-treatment for colouring layers
• A47J 27/00 - Cooking-vessels
• A47J 36/02 - Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay