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Journal ArticleDOI

EIS studies of a corrosion inhibitor behavior under multiphase flow conditions

01 Jun 2000-Corrosion Science (Pergamon)-Vol. 42, Iss: 6, pp 979-990
TL;DR: In this article, an imidazoline-based corrosion inhibitor is applied in a large diameter flow loop system and the Warburg diffusion parameter, b f =σω −1/2 was used to qualitatively analyze inhibitor films formed on the metal surface.
About: This article is published in Corrosion Science.The article was published on 2000-06-01. It has received 100 citations till now. The article focuses on the topics: Corrosion inhibitor & Multiphase flow.
Citations
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Journal ArticleDOI
TL;DR: In this article, the corrosion resistance of the Al 0.5 CoCrCuFeNiB x alloys with various amounts of added boron was investigated and the anodic polarization curves and electrochemical impedance spectra were obtained in 1 N H 2 SO 4 aqueous solution.
Abstract: High entropy alloys are a newly developed family of multicomponent alloys that consist of various major alloying elements, including copper, nickel, aluminum, cobalt, chromium, iron, and others. Each element in the alloy system is present at between 5 and 35 atom %. A high entropy alloy has numerous beneficial mechanical, magnetic, and electrochemical characteristics. This investigation discusses the corrosion resistance of the Al 0.5 CoCrCuFeNiB x alloys with various amounts of added boron. Surface morphological and chemical analyses verified that the addition of boron produced Cr, Fe, and Co borides. Therefore, the fraction of Cr outside borides precipitates was scant. The anodic polarization curves and electrochemical impedance spectra of the Al 0.5 CoCrCUFeNiB x alloys, obtained in 1 N H 2 SO 4 aqueous solution, clearly reveal that the general corrosion resistance decreases as the concentration of boron increases.

180 citations

Journal ArticleDOI
TL;DR: In this article, the effect of iodide ion additives was also studied by using electrochemical techniques, and the results showed that amido-imidazoline derivative inhibited corrosion of steel and the extent of its inhibition was concentration dependent.

160 citations

Journal ArticleDOI
TL;DR: In this article, an imidazoline based inhibitor behavior in carbon dioxide environment has been studied in large pipelines under different slug flow conditions by electrochemical impedance method, and it is found that, for each of the slug flow condition, charge transfer resistance, R t, and Warburg impedance coefficient, σ, increase with increasing exposure time.

148 citations

Journal ArticleDOI
TL;DR: In this article, a 1,4-bis (1-chlorobenzyl-benzimidazolyl)-butane (CBB) was synthesized and its inhibition effect on the corrosion of mild steel in 0.5 M HCl solution was investigated by weight loss and electrochemical techniques.

123 citations

Journal ArticleDOI
TL;DR: In this paper, the corrosion of carbon steel in 0.5 M HCl at 25°C was investigated in the presence of two synthesized quaternary isoxazolium Schiff base series using gravimetric, polarization and electrochemical impedance measurements.

119 citations

References
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Journal ArticleDOI
TL;DR: In this article, a small library of Bode and Nyquist plot shapes is presented, based on increasingly more complex equivalent electrical circuit models, along with methods for obtaining equivalent circuit component values.

602 citations

Journal ArticleDOI
TL;DR: In this paper, the application of EIS as a new tool for the investigation of methods of corrosion protection is illustrated for corrosion inhibitors, conversion coatings, polymer coatings and oxide layers as well as for cathodic protection of stainless steels.

378 citations

Journal ArticleDOI
25 Dec 1996-Langmuir
TL;DR: The self-assembled monolayer (SAM) model of OI inhibitors is proposed in this paper, where the OI molecules self-assemble on the surface of an iron oxide surface to form a hydrophobic barrier preventing migration of H2O, O2, and electrons to the Fe surface.
Abstract: Some of the most effective corrosion inhibitors for oil field pipeline applications are the oleic imidazoline (OI) class of molecules. However, the mechanism by which OIs inhibit corrosion is not known. We report atomistic simulations (quantum mechanics and molecular dynamics) designed to elucidate this mechanism. These studies lead to the self-assembled monolayer (SAM) model for corrosion inhibition, which explains the differences in corrosion inhibition efficiency for various OI molecules. The SAM model of OI inhibitors involves the following critical elements: (i) The function of the OI is to form a self-assembled monolayer on the native oxide surface of iron; this serves a protective role by forming a hydrophobic barrier preventing migration of H2O, O2, and electrons to the Fe surface. (ii) The imidazoline head group serves as a sufficiently strong Lewis base to displace H2O from the Lewis acid sites of the iron oxide surface. (iii) These head groups self-assemble on the surface to form an ordered mo...

231 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used Electrochemical impedance spectroscopy (EIS) to study the film formation and destruction and the corrosion protection mechanism of a carbon dioxide (CO 2 ) corrosion inhibitor, imidazoline.

184 citations

Journal ArticleDOI
TL;DR: In this article, the electrochemical noise analysis (ENA) was used to monitor the film formation and destruction processes of carbon dioxide (CO2) corrosion inhibitor imidazoline, which is most commonly used for protecting oil wells, gas wells and flowlines from CO2 corrosion.

149 citations