Abstract
The conditions for electrodeposition of Fe-Sn alloys from a novel, environmentally friendly, ferrous chloride-based electrolyte were studied. The influence of the pH on the electrolyte stability and deposit stoichiometry was studied and discussed. Anodic stripping voltammetry (ASV), XRD and SEM/EDX were used to characterise the electrodeposited phases. The results from ASVs indicated the possibility to deposit at least two different phases at high overpotentials. Hull cell depositions in an electrolyte with a Sn to Fe ratio 1:1 and a pH value of 2.8 showed regular deposition of Fe-Sn. Fe-rich deposits (54.84 at.-%) were obtained from an electrolyte with Sn to Fe ratio 1:10. The XRD results were compatible with the electrochemical investigations. In all studied samples β-Sn, FeSn2 and Fe5Sn3 were detected. The presence of ferromagnetic Fe5Sn3 was not influenced by the Sn to Fe ions ratio in the electrolyte.
| Original language | English |
|---|---|
| Pages (from-to) | 247-253 |
| Number of pages | 7 |
| Journal | Transactions of the Institute of Metal Finishing |
| Volume | 97 |
| Issue number | 5 |
| Early online date | 27 Aug 2019 |
| DOIs | |
| Publication status | E-pub ahead of print - 27 Aug 2019 |
Funding
This work was supported by the SELECTA (No. 642642) H2020-MSCA-ITN-2014 project. The authors would like to acknowledge Veronika Grman (Hirtenberger Engineered Surfaces) for performing SEM/EDX analyses and Werner Artner (X-ray Centre, Vienna University of Technology) for the XRD analyses.
Keywords
- anodic stripping voltammetry
- chloride
- ferrous-stannous electrolyte
- hull cell
- tin-iron electrodeposition
- XRD
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