Electrochemical gold deposition from non-toxic electrolytes

Research output: Contribution to journalConference Contribution

12 Citations (Scopus)

Abstract

An additive free electrolyte containing aurochloric acid, sodium sulphite and sodium thiosulphate has been used to electrodeposit gold. The electrolyte is stable at near-neutral conditions and was stable on storage after formulation. Laboratory scale experiments showed that the electrolyte was compatible with positive resists. UV-Vis spectroscopy and cyclic voltammetry indicate that gold is discharged from a thiosulphate ligand. Industrial scale piloting experiments showed that high quality gold could be deposited from the electrolyte and the deposition process was stable up to a few weeks. Gold precipitation was observed when the used electrolyte was stored for a long period; this suggests that a product formed during the deposition process, was responsible for gold precipitation.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
JournalECS Transactions
Volume16
Issue number36
DOIs
Publication statusPublished - 2009
EventGreen Electrodeposition 2 - 214th ECS Meeting - Honolulu, HI, United States
Duration: 12 Oct 200817 Oct 2008

Keywords

  • gold deposition
  • non-toxic electrolytes

Fingerprint

Dive into the research topics of 'Electrochemical gold deposition from non-toxic electrolytes'. Together they form a unique fingerprint.

Cite this