Influence of poly(aminoquinone) on corrosion inhibition of iron in acid media
2005; Elsevier BV; Volume: 252; Issue: 4 Linguagem: Inglês
10.1016/j.apsusc.2005.01.098
ISSN1873-5584
AutoresC. Jeyaprabha, S. Sathiyanarayanan, K.L.N. Phani, G. Venkatachari,
Tópico(s)Hydrogen embrittlement and corrosion behaviors in metals
ResumoThe 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 H2SO4 markedly.
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