Berlin 2015 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 36: Poster Session I

DS 36.60: Poster

Donnerstag, 19. März 2015, 09:30–12:00, Poster A

Effect of Co concentration in the bath on composition, microstructure, morphology aspects and electrochemical properties of Ni-Co coatings on aluminum — •Sina Sadreddini and Hida Rassaie — Department of Materials Science and Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.

In this study, the surface morphology of Ni-Co composite coating was investigated by field emission scanning electron microscopy (FESEM). The crystalline structure was examined by X-Ray diffraction (XRD) and the Corrosion behavior of coating was evaluated by electrochemical impedance spectroscopy (EIS) and polarization techniques. Different amounts of cobalt in the bath affected the morphology of Ni-Co deposited. By increasing the alloying element in bath, structure of Ni-Co coating changed from face centered cubic to hexagonal closed- pack and consequently influenced the corrosion behavior in chloride solution. In addition, increment the alloy element in the bath affected the charge transfer.