Noble metal-containing layer sequence for decorative articles
OwnerJoachim Grimm, Michael Lauster +1inventors
InventorsJoachim Grimm, Michael Lauster, Philip Schramek
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Abstract
The present invention is directed at a decorative article which has a particular noble metal-containing outer layer sequence. The invention further relates to a coating process suitable for this purpose. The layer sequence is characterized in that a palladium-containing bottom layer is followed by an electrolytically deposited alloy of ruthenium and an element of the group consisting of platinum and rhodium.
Claims15
Article for decorative purposes having a noble metal-containing outer layer sequence comprising, from the inside outwards, a palladium-containing bottom layer deposited electrochemically or reductively on a metallic substrate and an electrolytically deposited alloy of ruthenium and an element from the group consisting of platinum and rhodium, where the platinum-ruthenium alloy has a platinum content of from about 55 to about 80% by weight and the rhodium-ruthenium alloy has a rhodium content of from about 60 to about 85% by weight.
Article according to, wherein
- the platinum-ruthenium alloy has a platinum content of from about 60 to about 75% by weight.
Dependencies are inferred from the claim text.