title: Synthesis and corrosion protection properties of poly(o-phenylenediamine) nanofibers.
abstract: The present study shows a novel method for the synthesis of uniformly-shaped poly(othophenylediamine) (PoPD) nanofibers by chemical oxidative polymerization method for application towards smart corrosion resistance coatings. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) studies confirm morphology of PoPD with three dimensional (3D) networked dendritic superstructures having average diameter of 50-70 nm and several hundred meters of length. UV-vis and FTIR spectral results shows the formation of PoPD nanofibers containing phenazine ring ladder-structure with benzenoid and quinoid imine units. Thermogravimetric analyses (TGA) of PoPD nanofibers possess good thermal stability. The anti-corrosion behavior of PoPD nanofibers on 316L SS was investigated in 3.5% NaCl solution using potentiodynamic polarization and electrochemical impedance spectroscopic (EIS) measurements. The PoPD coated 316L SS exhibits higher corrosion potential when compared to uncoated specimen. EIS studies, clearly ascertain that PoPD nanofiber coatings exhibits excellent potential barrier to protect the 316L SS against corrosion in 3.5% NaCl.
authors: Centre for Research and Post-Graduate Studies in Chemistry, Ayya Nadar Janaki Ammal College (Autonomous), Sivakasi 626 124, Tamil Nadu, India.
authors: P
authors: P
authors: Muthirulan
authors: Centre for Research and Post-Graduate Studies in Chemistry, Ayya Nadar Janaki Ammal College (Autonomous), Sivakasi 626 124, Tamil Nadu, India.
authors: N
authors: N
authors: Kannan
authors: Centre for Research and Post-Graduate Studies in Chemistry, Ayya Nadar Janaki Ammal College (Autonomous), Sivakasi 626 124, Tamil Nadu, India.
authors: M
authors: M
authors: Meenakshisundaram
keywords: 3.5% NaCl; 316L SS; Anticorrosive coatings; Oxidative polymerization; Poly(o-phenylenediamine) nanofibers