Method of colouring anodised magnesium or alloys thereof

摘要

The method of colouring a magnesium or magnesium alloy article comprises: a) ensuring that the article has or is provided with an anodized or oxidized surface of magnesium or magnesium alloy without adding to the surface of any aluminum species and b) contacting the anodized or oxidized surface with at least one species of chromophoric moiety in a liquid carrier in conditions or in a sequence of conditions which are not prejudicial to the integrity of the anodized or oxidized surface and results in the chromphore becoming associated (either directly or via a moiety or species attached to the chromophore) with the surface by a reaction or adsorption provided that the conditions do not result in the buildup of aluminum on the surface even if magnesium alloy contains aluminum.