This paper describes the deposition of various Ni-P composite coatings over an AISI 1012 steel sample through an electroless coating process. The composite coatings were prepared using various ternary additives namely carbon nanotubes, titanium, and alumina. Coated samples were characterized over alongside surface and cross-sections using energy dispersive spectroscopy. Corrosion behaviors of composite coatings were characterized using potentiodynamic polarization. Mechanical and tribological attributes were evaluated using Vickers hardness and nano-indentation, respectively. Among the candidate additives, Titanium reached the maximum incorporation (upto 30 wt.%). Alumina particles showed competing compromise between surface smoothness and deposition rate. Carbon nanotubes improved lubrication effects by reducing co-efficient of friction (checked using universal micro tribometer). Alumina manifested the highest hardness and the least corrosion rate in comparison to the candidate additives.

Subject
Wear, Nickel coatings, Wear resistance, Coatings, Materials, Plating, Additives, Surfaces, Composites, Weight loss, Titanium, Carbon, Hardness
Keywords:
Electroless nickel, Alumina, Carbon nano-tubes, Titanium, Composite coating
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2022
Association for Materials Protection and Performance (AMPP)
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