Preparation and characterization of Ni-Co-TiN/CeO 2 composite coating by jet electrodeposition for improved mechanical and anti-corrosion properties

The Ni-Co alloy was coated with Ni-Co-TiN/CeO 2 by Jet electrodeposition to enhance the properties of Nickel-Cobalt (Ni-Co) alloy. The morphologies, texture orientation, microhardness, coating adhesion, wear resistance, and corrosion resistance of Ni-Co-TiN/CeO 2 composite coatings were characterized. The influences of concentration of mixed particles (micron-TiN and nano- CeO 2 ) on microstructural, surface properties, mechanical properties and anti-corrosion performance of the composite coatings were studied. The addition of nano-mixed particles changed the morphology of Ni-Co-TiN/CeO 2 composite coating from large cellular protrusion structures to fine granular structures, the mechanical properties and anti-corrosion performance of Ni-Co-TiN/CeO 2 composite coatings were improved. The composite coating exhibited superior microhardness, bonding force, wear resistance and anti-corrosion performance, when the concentration of mixed particles was 4 g l −1 . This work contributed to the development of a variety of micro- and nanoparticle phase-enhanced metal-based composite coatings.