摘 要: | In current research, in order to enhance the incorporation of nano-sized TiC particles
into electroless Ni–P (EN) coating, different types of surfactant (cationic, anionic, and polymeric)
were added to the plating bath. The effects of addition of the surfactants on surface morphology,
deposition rate, TiC and P contents of the prepared coatings were investigated. The surface
morphology was evaluated by scanning electron microscopy (SEM). It was demonstrated that in
the presence of the anionic, polymeric and somehow cationic surfactants, TiC nano-particles were
embedded in the matrix which influenced the surface morphology. The effect of surfactant types on
the corrosion properties of Ni–P/TiC coated steel was also studied. Corrosion behavior of the
coated steel was evaluated by potentiodynamic polarization and electrochemical impedance
spectroscopy (EIS) which affected by the incorporation of TiC particles into the Ni–P matrix.
The level of corrosion resistance improvement depended largely on the phosphorous and TiC
concentration of the applied coating.
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