Poly(m-phenylendiamine-co-o-aminophenol) coatings on mild steel: Effect of comonomers feed ratio on surface and corrosion protection aspects

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Copolymer of m-phenylendiamine (mPD) and o-aminophenol (oAP) has been electrochemically deposited on mild steel from an aqueous solution of oxalic acid using cyclic voltammetric technique. The copolymer structure was confirmed by Proton Nuclear Magnetic Resonance (1H NMR) and Attenuated Total Reflection Infrared (ATR-IR) spectroscopic techniques. Surface characterisation results indicated that the formed copolymer coatings posses uniform, smooth surface and strong adherence towards the metal surface. Corrosion performance of copolymer coatings was investigated in 0.5 M HCl solution using potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) methods. Results showed that corrosion performance of copolymer coatings depends on the feed ratio of both the monomer units in copolymer chain. It was found that the copolymer feed ratio of mPD:oAP = 70/30 in coatings exhibited the highest performance due to its superior surface nature than other copolymer coatings.

Original languageEnglish
Pages (from-to)1445-1453
Number of pages9
JournalProgress in Organic Coatings
Volume76
Issue number10
DOIs
StatePublished - Oct 2013
Externally publishedYes

Keywords

  • AFM
  • Corrosion
  • EIS
  • Polymer coatings
  • Porosity
  • Surface

ASJC Scopus subject areas

  • General Chemical Engineering
  • Surfaces, Coatings and Films
  • Organic Chemistry
  • Materials Chemistry

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