Nickel field composite coatings have a high ability to improve surface properties, such as increased corrosion resistance and abrasion resistance. In this study, Ni-P-TiO2-ZrO2 composite coating on AISI 316L steel substrate was deposited by direct current flow method and the effects of different pH 3, 3.5, 4 and 4.5 on coating morphology and corrosion resistance were investigated. Scanning elec...