Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5439910 | Corrosion Science | 2017 | 7 Pages |
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Galina Palyanova, Konstantin Kokh, Yurii Seryotkin,