cyclic voltammetry study of the effect
of propargyl alcohol onto iron in NaOH medium
A. Yapi1, A.P. Ahoussou1*, A. Trokourey1, B. Kokoh2, J.-M Léger2, A. Kone1, Y. Bokra1
1Laboratoire de Chimie Physique, URF-SSMT, Université de Cocody, 22 BP 582 Abidjan 22, Cote d’Ivoire.
2Equipe Electrocatalyse, UMR 6503, CNRS-Université de Poitiers,40 Avenue du Recteur Pineau, 86022 Poitiers, Cedex – France.
* Corresponding author. E-mail: firstname.lastname@example.org
Received: 17 February 2009; revised version accepted: 24 September 2009
Cyclic voltammetry study of iron in NaOH medium at 5 mV/s and 50 mV/s, shows that for the two sweeps rates of potential, the inhibition of iron corrosion in the presence of propargyl alcohol ( PA) depends on the concentration of the inhibitor PA. The corrosion is strongly slow down when the quantity of alcohol added is significant. At 5 mV/s, the formation of a protective film on the iron surface, from the electropolymerization of PA which is a slow kinetic led to the suppression of the oxidation and reduction reactions. The study demonstrated that the inhibiting effect of PA is more favoured at 5 mV/s than 50 mV/s.
Keywords: Iron; Corrosion; Inhibition; Propargyl alcohol; Sodium hydroxide; Cyclic voltammetry.