Abstract
This study examined the effect of bis-3-sulfopropyl-disulfide (SPS) addition to chromium sulfate solution on the characteristics of trivalent chromium electrodeposition. To investigate the effect of SPS on current efficiency, electrodeposition was carried out on the Invar surface at a constant current over time. Electrochemical tests, surface and solution analyses, density functional theory calculation, and Vickers micro-hardness tests were conducted to identify the SPS mechanism and evaluate its properties. SPS addition improved the electrodeposition current efficiency more than two-fold by increasing the nucleation of the electrode and changing the Cr-complex in solution to increase the bonding length between trivalent chromium ions and water molecules. Also, the surface hardness and corrosion resistance of the electrodeposited specimen were improved in the SPS-containing solution.
| Original language | English |
|---|---|
| Pages (from-to) | 7489-7504 |
| Number of pages | 16 |
| Journal | International Journal of Electrochemical Science |
| Volume | 13 |
| Issue number | 8 |
| DOIs | |
| State | Published - 1 Aug 2018 |
Keywords
- Bis-3-sulfopropyl-disulfide
- Current efficiency
- Electrodeposition
- Trivalent chromium
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