Microstructure and properties of sol-enhanced Ni-Co-TiO2 nano-composite coatings on mild steel》.pdfVIP

Journal of Alloys and Compounds 649 (2015) 222 e228 Contents lists available at ScienceDirect Journal of Alloys and Compounds journal homepage: http://www.elsevier .com/locate/jalcom Microstructure and properties of sol-enhanced Ni-Co-TiO2 nano-composite coatings on mild steel Yuxin Wang a, See Leng Tay a, Shanghai Wei a, Chao Xiong a, b, Wei Gao a, *, R.A. Shakoor c, Ramazan Kahraman c a Department of Chemical Materials Engineering, The University of Auckland, PB 92019, Auckland 1142, New Zealand b School of Photoelectric Engineering, Changzhou Institute of Technology, Changzhou 213002, China c Department of Chemical Engineering, College of Engineering, Qatar University, PB 2713, Doha, Qatar a r t i c l e i n f o a b s t r a c t Article history: Ni-Co-TiO2 nano-composite coatings were electroplated on mild steel by adding transparent TiO2 sol (0 Received 28 April 2015 e50 mL/L) into the Ni-Co plating solution. The microstructure, mechanical property and corrosion Received in revised form resistance of the composite coatings were systematically investigated. It was found that after adding an 10 July 2015 optimum sol concentration into the plating bath, a good dispersion of TiO2 nanoparticles can be achieved Accepted 17 July 2015 in the Ni-Co coating matrix, resulting in a significant improvement in coating mechanical properties. Ni- Available online 20 July 2015 Co-12.5 mL/L TiO2 coating possessed the best microhar