Corrosion Inhibition Efficiency in Relation to Micellar Interaction Parameters of Cationic/Nonionic Surfactant Mixtures for Carbon Steel Pipelines in 1 M HCl Solution
A. M. Al-Sabagh; Noura Saad tantawy; N. M. Nasser; M. R. Mishrif;
Abstract
The effect of different nine molar mixed ratios of didecyl dimethyl ammonium chloride as a
cationic surfactant and nonyl phenol ethoxylate (e.o.¼9) as a nonionic surfactant, on the
inhibition behavior of carbon steel have been examined using the weight loss and the potensiodynamic
methods. The results show that these mixed cationic/nonionic surfactant mixtures (II to X)
can be used to inhibit the corrosion of steel pipelines in the petroleum acid job. The surface active
properties of the used surfactant mixtures were calculated using the surface tension measurements
and the critical micelle concentration (CMC) values. The micellar interaction parameters of the
investigated mixtures were calculated using the data of CMC. From the corrosion results it was
found that, the maximum synergistic effect was obtained by the mixtures VIII (30%Cþ70%N)
and IV (70%Cþ30%N). They exhibited inhibition efficiency expressed by the rate of corrosion
as 5.15 and 1.53 miles per year respectively, at 400 ppm. The positive synergistic behavior of these
mixtures pronounced the better results than which obtained by the individual inhibitors (cationic
or nonionic alone). At the same time the maximum micellar interaction parameter was obtained
by the mixtures VIII and IV ( 1.85 and 1.80, respectively). These results justified the strong
relationship between the corrosion inhibition efficiency and the micellar interaction parameters
of the mixed surfactants which used as an organic corrosion inhibitors.
cationic surfactant and nonyl phenol ethoxylate (e.o.¼9) as a nonionic surfactant, on the
inhibition behavior of carbon steel have been examined using the weight loss and the potensiodynamic
methods. The results show that these mixed cationic/nonionic surfactant mixtures (II to X)
can be used to inhibit the corrosion of steel pipelines in the petroleum acid job. The surface active
properties of the used surfactant mixtures were calculated using the surface tension measurements
and the critical micelle concentration (CMC) values. The micellar interaction parameters of the
investigated mixtures were calculated using the data of CMC. From the corrosion results it was
found that, the maximum synergistic effect was obtained by the mixtures VIII (30%Cþ70%N)
and IV (70%Cþ30%N). They exhibited inhibition efficiency expressed by the rate of corrosion
as 5.15 and 1.53 miles per year respectively, at 400 ppm. The positive synergistic behavior of these
mixtures pronounced the better results than which obtained by the individual inhibitors (cationic
or nonionic alone). At the same time the maximum micellar interaction parameter was obtained
by the mixtures VIII and IV ( 1.85 and 1.80, respectively). These results justified the strong
relationship between the corrosion inhibition efficiency and the micellar interaction parameters
of the mixed surfactants which used as an organic corrosion inhibitors.
Other data
Title | Corrosion Inhibition Efficiency in Relation to Micellar Interaction Parameters of Cationic/Nonionic Surfactant Mixtures for Carbon Steel Pipelines in 1 M HCl Solution | Authors | A. M. Al-Sabagh; Noura Saad tantawy ; N. M. Nasser; M. R. Mishrif | Keywords | Cationic/nonionic surfactant mixtures;corrosion inhibitors;critical micelle concentration;interaction parameters;mixed micelle;synergistic effect | Issue Date | 29-Oct-2009 | Publisher | Taylor & Francis | Journal | Journal of Dispersion Science and Technology | Volume | 30 | Start page | 1411 | End page | 1423 | DOI | 10.1080/01932690902735306 |
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