The Role of Ni(II) Ion Adsorption onto TiO2 in the Electrodeposition of Composite Ni-P+TiO2 Coatings

Abstract

This study reports on Ni (II) ion adsorption onto TiO2powder of different concentration in suspension baths developed for electrodeposition of composite Ni-P+TiO2coatings. The experimental results were modeled with the Langmuir, Freundlich and Temkin adsorption isotherms. It was found that the best fit of Ni (II) ion adsorption data was obtained using the Langmuir isotherm. The study also revealed that adsorption of the nickel ions is a function of TiO2adsorbent dose in bath. The role of Ni (II) ion adsorption onto TiO2adsorbate in the elctrodeposition process of composite Ni-P+TiO2coatings was discussed.