Abstract
The study investigates the relationship of the reverse-pulse electrodeposited zinc-nickel alloy coatings’ characteristics and their corrosion behaviors in a saline environment, using both anodic polarization and electrochemical impedance analysis. The introduction of anodic pulsation gives deposits of more refined grain sizes and increased nickel contents, resulting in improvement of the corrosion resistance. High anodic current densities employed in the reverse-pulse electrodeposition, however, modulate crystallographic orientations of the grains, introduce porosity to the structure, and hence adversely affect the corrosion resistance of the coating deposits.
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Acknowledgments
The Thailand Research Fund financially supported this work under contract TRG5380017. The authors also acknowledge support from Chulalongkorn University under the Special Task Force for Activating Research (STAR) project granted to the Metallic Surface Coating Technology for Corrosion Protection (MCTC) research group.
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Boonyongmaneerat, Y., Saengkiettiyut, K., Saenapitak, S. et al. Corrosion Behavior of Reverse-Pulse Electrodeposited Zn-Ni Alloys in Saline Environment. J. of Materi Eng and Perform 23, 302–307 (2014). https://doi.org/10.1007/s11665-013-0685-x
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DOI: https://doi.org/10.1007/s11665-013-0685-x