Journal
METALS
Volume 10, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/met10111455
Keywords
electrodeposition; NiSn-rGO composite coating; deep eutectic solvent; direct current plating; pulse current plating; corrosion
Funding
- European Union's Horizon 2020 research and innovation programme under the MARIE-SKLODOWSKA-CURIE, grant [764977]
- Romanian Ministry of Education and Research under the ECSEL-H2020 Project: OCEAN12 [9/1.1.3H/20.01.2020, 129948]
- Romanian Ministry of Education and Research under the ECSEL-H2020 Project: MADEin4 [8/1.1.3H/06.01.2020, 128826]
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The present work describes, for the first time, the electrodeposition of NiSn alloy/reduced graphene oxide composite coatings (NiSn-rGO) obtained under pulse current electrodeposition conditions from deep eutectic solvents (choline chloride: ethylene glycol eutectic mixtures) containing well-dispersed GO nanosheets. The successful incorporation of the carbon-based material into the metallic matrix has been confirmed by Raman spectroscopy and cross-section scanning electron microscopy (SEM). A decrease in the crystallite size of the coating was evidenced when graphene oxide was added to the electrolyte. Additionally, the topography and the electrical properties of the materials were investigated by atomic force microscopy (AFM). The corrosion behavior in 0.5 M NaCl solution was analyzed through potentiodynamic polarization and electrochemical impedance spectroscopy methods for different immersion periods, up to 336 h, showing a slightly better corrosion performance as compared to pure NiSn alloy.
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