Premium
The effect of TiO 2 nanoparticle codeposition on microstructure and corrosion resistance of electroless NiP coating
Author(s) -
Momenzadeh M.,
Sanjabi S.
Publication year - 2012
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201005985
Subject(s) - materials science , diffractometer , coating , scanning electron microscope , microstructure , nanocomposite , indentation hardness , corrosion , nanoparticle , chemical engineering , metallurgy , nuclear chemistry , composite material , nanotechnology , chemistry , engineering
NiPTiO 2 nanocomposite coatings with various contents of TiO 2 nanoparticles were synthesized by adding TiO 2 nanoparticles to NiP electroless plating solution. The effects of pH and anionic surfactant sodium dodecyl sulfate (SDS) on the chemical composition of Ni, P, and TiO 2 in the coatings were investigated. Scanning electron microscope (SEM), energy dispersive spectrometer (EDX), and X‐ray diffractometer (XRD) were used to characterize the morphology, composition, and crystal structure of deposited coatings, respectively. The hardness of nanocomposite coatings was improved greatly compared to NiP coating especially after heat treatment. After heat treatment at 400 °C for 1 h, an increase in microhardness was observed for heat‐treated NiP coatings. The hardness was increased from 805 to 1050 Hv for NiPTiO 2 coating deposited at 9 g/LTiO 2 concentration in the bath. The corrosion resistance of NiPTiO 2 coating was significantly increased compared to NiP coatings by incorporation of TiO 2 nanoparticle.