Influence of poly(aminoquinone) on corrosion inhibition of iron in acid media

The inhibitor performance of chemically synthesized water soluble poly(aminoquinone) (PAQ) on iron corrosion in 0.5 M sulphuric acid was studied in relation to inhibitor concentration using potentiodynamic polarization and electrochemical impedance spectroscopy measurements. On comparing the inhibit...

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Veröffentlicht in:	Applied surface science 2005-11, Vol.252 (4), p.966-975
Hauptverfasser:	Jeyaprabha, C., Sathiyanarayanan, S., Phani, K.L.N., Venkatachari, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Corrosion Cross-disciplinary physics: materials science rheology Exact sciences and technology Inhibition Iron Physics Polyaminoquinone Sulphuric acid
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Zusammenfassung:	The inhibitor performance of chemically synthesized water soluble poly(aminoquinone) (PAQ) on iron corrosion in 0.5 M sulphuric acid was studied in relation to inhibitor concentration using potentiodynamic polarization and electrochemical impedance spectroscopy measurements. On comparing the inhibition performance of PAQ with that of the monomer o-phenylenediamine (OPD), the OPD gave an efficiency of 80% for 1000 ppm while it was 90% for 100 ppm of PAQ. PAQ was found to be a mixed inhibitor. Besides, PAQ was able to improve the passivation tendency of iron in 0.5 M H 2SO 4 markedly.
ISSN:	0169-4332 1873-5584
DOI:	10.1016/j.apsusc.2005.01.098