Berlin 2015 – scientific programme

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DS: Fachverband Dünne Schichten

DS 36: Poster Session I

DS 36.59: Poster

Thursday, March 19, 2015, 09:30–12:00, Poster A

Effect of current density on properties of Ni-W coating — •Hida Rassaie and Sina Sadreddini — Department of Materials Science and Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.

In this study, the Ni-W coating was electrodeposited on aluminum at different current densities. Various current densities were applied to investigate the effect of current density on tungsten content, grain size, surface morphology and corrosion behavior. The morphology of Ni-W coating was investigated by FESEM. Also, spherical morphology was observed at 1, 3 and 5 A/dm2. The study demonstrated that tungsten concentration decreased by increasing the current density. Fcc peak was observed in all three Ni-W coatings in XRD patterns. Electrochemical polarization proved that the reduced corrosion resistance of Ni-W nanocrystalline electrodeposit was due to the increment of applied current density.