The Effect of the Carbon Nanotube Content on the Corrosion Behaviour of Ni-P-CNT Composite Coating

Document Type : Research Paper


1 Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran

2 Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran


In the present study, Ni-P-CNT composite coating was successfully fabricated via electroless plating. Scanning electron microscopy (SEM) was used to characterize the coatings. The effect of CNTs concentration in the bath on its content in the composite coatings was studied. Furthermore, the corrosion behaviour of the coatings with different contents of CNTs was evaluated using Tafel polarization and electrochemical impedance spectroscopy (EIS) methods in 3.5 wt.% NaCl aqueous solution at the room temperature. The results showed that the corrosion resistance of the Ni–P-CNT composite coatings was excellent in comparison with that of the Ni-P coatings and the content of incorporated CNTs played a key role in the passivation and corrosion resistance.


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