Abstract
Nanocomposite coatings exhibit superior properties including corrosion and wear resistances compared to the plain non-composite ones. In this work, the deposition of polyvinyl chloride (PVC) and polystyrene (PS) nanofiber coatings on brass surface was carried out. The work was also extended to study the effects of PVC and PS on the corrosion passivation of brass in aerated 3.5 wt.% sodium chloride (NaCl) solutions. The PVC and PS coatings were prepared and deposited on brass surface using electrospinning technique. The nanofibers coating layers were characterized using optical (OM) and scanning electron (SEM) microscopes. The OM and SEM micrographs depicted that the PVC and PS coatings consist of dense and compact entangled nanofibers that completely cover up the brass surface. The corrosion measurements were performed by cyclic potentiodynamic polarization (CPP) and electrochemical impedance spectroscopy (EIS) techniques on the uncoated and PVC and PS coated brass surfaces in NaCl solutions. Both CPP and EIS data confirmed that PVC and PS coatings protect the brass surface from being corroded through minimizing its corrosion current and corrosion rate and increasing its polarization resistance.