Sulphidation of Au-Ag alloys in the presence of pyrite (experimental data)

Galina Palyanova, Konstantin Kokh, Yurii Seryotkin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Dry annealing of Au-Ag alloys (Au, Au0.56Ag0.44, Au0.35Ag0.65, Au0.19Ag0.81 and Ag), together with pyrite as a source of sulphur, at 450 °C was used to study the mechanisms of corrosion and transition of metal forms of noble metals to sulphide forms. In the experiment with Ag plates the silver completely sulphidates to form acanthite Ag2S and pyrite desulphidates to form pyrrhotite Fe1-yS. In the experiments with the Au-Ag plates there also formation of an uytenbogaardtite phase and ennobling of Au-Ag alloys take place. Gold in the absence of silver stabilizes pyrite and prevents its transition to pyrrhotite.

Original languageEnglish
Pages (from-to)126-132
Number of pages7
JournalCorrosion Science
Volume121
DOIs
Publication statusPublished - 1 Jun 2017

Keywords

  • A. Alloy
  • A. Silver
  • B. EPMA
  • B. X-ray diffraction
  • C. Sulphidation
  • GOLD
  • MINERALS
  • X-ray diffraction
  • SULFUR
  • DEPOSIT
  • GENESIS
  • PYRRHOTITE
  • Alloy
  • Silver
  • ORES
  • SILVER SULFIDES
  • MINERALIZATION
  • CONSTRAINTS
  • Sulphidation
  • EPMA

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