Abstract
The electrochemical behavior of gold dissolution in the Cu2+-NH3-S2O32-EDTA solution has been investigated in detail by deriving and analyzing the Tafel polarization curve, as this method is currently widely implemented for the electrode corrosion analysis. The dissolution rate of gold in Cu2+-NH3-S2O32-EDTA solution was determined based on the Tafel polarization curves, and the effects of various compound compositions in a Cu2+-NH3-S2O32-EDTA mixture on the corrosion potential and corrosion current density were analyzed. The results showed that the corrosion potential and polarization resistance decreased, whereas the corrosion current density increased for certain concentrations of S2O32-NH3-Cu2+ and EDTA, indicating that the dissolution rate of gold had changed. The reason for promoting the dissolution of gold is also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 496-502 |
| Number of pages | 7 |
| Journal | Green Processing and Synthesis |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jan 2020 |
| Externally published | Yes |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- Tafel polarization curve
- anodic dissolution
- electrochemical behavior
- thiosulfate
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