Titel
Tartrate-Based Electrolyte for Electrodeposition of Fe–Sn Alloys
Autor*in
Edmund Dobročka
Institute of Electrical Engineering, Slovak Academy of Sciences
Selma Hansal
Hirtenberger Engineered Surfaces GmbH
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Abstract
Magnetic properties of the sustainable Fe–Sn alloys are already known. However, there is lack of information in the field of Fe–Sn electrodeposition. In the present study, a novel Fe(III)–Sn(II) electrolyte with tartaric acid as a single complexing agent is introduced. The influence of the pH and the current density on the structural properties of the Fe–Sn deposit was studied. The stability of the electrolytes as a main attribute of sustainability was tested. The ferromagnetic phases Fe5Sn3 and Fe3Sn were electrodeposited for the first time, and it was found that the mechanism of the Fe–Sn deposition changes from normal to anomalous at a pH value 3.0 and a current density of approximately 30 mA/cm2. A possible reason for the anomalous deposition of Fe–Sn is the formation of Fe-hydroxides on the cathode surface. Two electrolyte stability windows exist: The first stability window is around a pH value of 1.8 where bimetallic Fe–Sn tartrate complexes were formed, and second one is around a pH value of 3.5 where most of the Sn ions were present in the form of [Sn(tart)2]2− and Fe in the form of [Fe(tart)]+ complexes.
Stichwort
electrodepositioniron-tin alloystartaric acidanomalous depositionintermetallicelectrolyte stability
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
Coatings
Band
9
Ausgabe
5
ISSN
2079-6412
Erscheinungsdatum
2019
Seitenanfang
313
Publication
MDPI AG
Erscheinungsdatum
2019
Zugänglichkeit
Rechte
Rechteangabe
© 2019 by the authors
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