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A study on the effect of new prepared amide cationic amphipathic on the corrosion inhibition of API N80 steel pipelines in oil wells industries

Samy Shaban (Petrochemical Department, Egyptian Petroleum Research Institute, Cairo, Egypt)
Abd Elaziz Fouda (Department of Chemistry, El-Mansoura University, Almansora, Egypt)
Mohamed Elmorsi (Department of Chemistry, Tanta University, Tanta, Egypt)
Tarek Fayed (Department of Chemistry, Tanta University, Tanta, Egypt)
Omar Azazy (Corrosion Control Section Head, General Petroleum Company (GPC), Red Sea - Qharb, Egypt)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 12 March 2018

Issue publication date: 23 March 2018

Abstract

Purpose

The purpose of this study is to inspect the corrosion inhibition of API N80 steel pipelines in uninhibited solution and inhibited with a synthesized surfactant compound [N-(3-(dimethyl octyl ammonio) propyl) palmitamide bromide] (DMDPP), which is prepared through a simple and applicable method.

Design/methodology/approach

Weight loss was inspected at five different temperatures of 25°C, 30°C, 40°C, 50°C and 60°C Potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation were used at room temperature. Density functional theory was used to study the relation between the molecular structure and inhibition theoretically.

Findings

Adsorption of the prepared DMDPP fits the Langmuir isotherm model. The inhibition efficiency of the prepared DMDPP amphipathic inhibitor is directly proportional to temperature increase. Polarization results reveal that the investigated DMDPP amphipathic compound behaves as a mixed-type inhibitor. EIS spectra produced one individual capacitive loop.

Originality/value

The originality is the preparation of cationic surfactants through a simple method, which can be used as corrosion inhibitors in oil production. The synthesized inhibitors were prepared from low-price materials. The work studied the behavior of the synthesized surfactants in inhibiting the corrosion of the steel in an acidic medium. Electrochemical and theoretical studies were presented, besides gravimetric and surface examination.

Keywords

Citation

Shaban, S., Fouda, A.E., Elmorsi, M., Fayed, T. and Azazy, O. (2018), "A study on the effect of new prepared amide cationic amphipathic on the corrosion inhibition of API N80 steel pipelines in oil wells industries", Anti-Corrosion Methods and Materials, Vol. 65 No. 2, pp. 197-209. https://doi.org/10.1108/ACMM-08-2017-1824

Publisher

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Emerald Publishing Limited

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