Abstract:
Stainless steel 316L is extensively used in high performance application due to its
good mechanical strength and resistance towards corrosion. However, this type of
steel is still tends to undergo pitting and crevice corrosion when exposed to
aggressive environment such as marine environment. In this study, a new coating
material is formulated to control corrosion by introducing zinc oxide (ZnO) and
(poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), PEDOT:PSS) hybrid
nanocomposite into epoxy resin based coating. The physiochemical properties of
formulated coating and the effect of varied weight percentage (wt.%) of hybrid
nanocomposite with immersion time on coating performance is studied. To achieve
these objectives, 1 to 5 wt.% ZnO-PEDOT:PSS is mixed and dispersed in epoxy
based coating and coated on 316L substrates using brush coating technique. The
samples are immersed in real environment for 60 days. The Fourier Transform
Infrared spectroscopy (FTIR), Field Emission Scanning Electron
Microscope/Energy-Dispersive X-ray spectroscopy (FESEM/EDX), Transmission
Electron Microscopy (TEM), X-ray Diffraction (XRD) and Thermo-Gravimetric
Analysis (TGA) analysis showed good compatibility and stability between ZnO and
PEDOT:PSS in epoxy based coating while maintained amorphous state of epoxy
coating.
