Synergistic Eect of Ag and ZnO Nanoparticles on Polypyrrole-Incorporated Epoxy/2pack Coatings and Their Corrosion Performances in Chloride Solutions

Journal Article

2019

In this study, two formulae (F1 and F2) of epoxy/2pack coatings incorporated with
polypyrrole (PPy)-conducting polymer were produced from bisphenol-A type of epoxy resin (DGEBA)
with the addition of Ag and ZnO nanoparticles. The synergism e ect of Ag and ZnO nanoparticles
on the mechanical and corrosion resistance properties was reported. The curing agent 2,4,6-tris
(dimethylaminomethyl) phenol (ARADUR 3282-BD) was used under optimized stoichiometry values.
The nanoparticles ratio in di erent wt.% were first dispersed in solvent by the sonication process and
then added to epoxy/PPy composition. All the coated steel panels were cured at room temperature
in a controlled dust free environment for 7 days in order to obtain a hard and intact coating. The
dispersion of nano-size ZnO and Ag pigments was investigated using scanning electron microscopy
(SEM) and its composition through an energy dispersive X-ray (EDX) technique. Conventional
techniques and nano-indentation were also performed to observe the e ect of ZnO and Ag synergism
content on the hardness and modulus of elasticity at nano scale. The corrosion behavior of the
coated samples was investigated at room temperature in 3.5% NaCl solution using electrochemical
impedance spectroscopy (EIS). The synergism e ect of nanoparticles along with PPy resulted in an
enhancement of mechanical and corrosion-resistant properties.

• Volume Number: 9
• Magazine \ Newspaper: Coatings
• Pages: 287