Comparative Study of the Corrosion Inhibition Efficacy of Polypropylene Glycol and Poly (Methacrylic Acid) for Mild Steel in Acid Solution

Saviour Umoren, Moses Monday Solomon, Aniekemeabasi Ubon Israel, Ubong Monday Eduok, Akanimo E. Jonah

Research output: Journal PublicationArticlepeer-review

24 Citations (Scopus)

Abstract

The performance of polypropylene glycol (PPG) and poly (methacrylic acid) (PMAA) as corrosion inhibitors for mild steel in acid solution was assessed by weight loss, electrochemical (electrochemical impedance spectroscopy, linear polarization resistance and potentiodynamic polarization), and surface analysis (water contact angles) techniques. Results obtained showed that both polymers inhibited mild steel corrosion but PPG was the best inhibitor. Inhibition efficiency increased with the increase in inhibitor concentration but decreased with temperature rise. Polarization results show that both PPG and PMAA behaved as a mixed-type inhibitors. The adsorption of the polymers onto the mild steel surface followed Temkin adsorption isotherm model. The variation of inhibition efficiency with temperature point toward physical adsorption which is supported by the kinetic and thermodynamic parameters derived from the experimental data. Water contact angle measurement results show that the polymers were adsorbed onto the mild steel surface.

Original languageEnglish
Pages (from-to)1721-1735
Number of pages15
JournalJournal of Dispersion Science and Technology
Volume36
Issue number12
DOIs
Publication statusPublished - 2 Dec 2015
Externally publishedYes

Keywords

  • Acid corrosion
  • corrosion inhibition
  • mild steel
  • poly (methacrylic acid)
  • polypropylene glycol

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Polymers and Plastics

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