| 摘要 |
<p>A method of forming a surface finish of trivalent chromium on metal or plastics substrates by electrodeposition from an aqueous plating solution of trivalent chromium ions in which the trivalent chromium is deposited on a layer of silver or silver alloy whereby the colour and/or corrosion resistance of the trivalent chromium is comparable to surface finishes of exavalent chromium. The invention avoids the health and safety risks associated with the electrodeposition of exavalent chromium surface finishes.</p> |
