Kinetic Analysis of the X100 Steel Corrosion in Brine containing Inhibitor (Imidazoline) under different Turbulent Flow Conditions

Campechano-Lira, Clarisa

doi:10.20964/2022.11.43

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…In contrast, the cathodic branch plateau corresponding to i l,O 2 remains almost unchanged with the immersion time between 0.5 to 0.7 A/m 2 . On the other hand, for the results at a rotation rate of 1200 rpm, i l,O 2 shows significantly higher values ranging between 3 to 5 A/m 2 ; because of this, significantly higher i corr values in comparison with no rotation situation will be obtained [21]. The cathodic branch reveals a continuous decrease of the current density as the immersion time increases.…”

Section: Steel Corrosion In Pure Ro Watermentioning

confidence: 79%

Electrochemical Behavior of Carbon Steel ASTM A36 in Diluted Pregnant Leach Solutions from Electrowinning of Copper

Cáceres,

Soliz,

Galleguillos-Madrid

2024

Metals

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In Northern Chile, large amounts of highly corrosive solutions are currently generated in the process of cathode washing after completing the electrowinning or electrorefining process of copper. This study investigates the electrochemical behavior of ASTM A36 carbon steel in pregnant-leach-solution (PLS) wash water. Measurements of electrochemical impedance spectroscopy and linear sweep voltammetry, complemented with weight loss measurements, were performed. Four ratios of PLS containing reverse osmosis (RO) water are evaluated, considering both quiescent and rotating conditions of the steel specimen. The results indicate that oxygen reduction, hydrogen evolution, and iron oxidation reactions are all involved during the corrosion of carbon steel in pure RO water, with the corrosion rate increasing up to 4 times under rotating conditions. In the case of corrosion in RO wash water containing PLS, a galvanic process occurs whereby copper is reduced at the expense of iron oxidation, superimposed on former partial reactions. The deposited copper induces notable corrosion inhibition of steel, observed as a significant drop in corrosion rate from high initial to constant residual values. Morphological and X-ray analyses support that corrosion is affected by oxide layer formation and galvanic copper deposition, confirming the results obtained from electrochemical analysis and weight loss measurements.

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Section: Steel Corrosion In Pure Ro Watermentioning

confidence: 79%

Electrochemical Behavior of Carbon Steel ASTM A36 in Diluted Pregnant Leach Solutions from Electrowinning of Copper

Cáceres,

Soliz,

Galleguillos-Madrid

2024

Metals

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“…It is important to note that, since the inhibitor must be integrated into the environment in which the metal part to be protected is located, their use is restricted to closed or semiclosed systems (4). They are chemical substances that form films on metals and alloys added in low concentrations (ppm) and thus reduce the corrosion rate and the aggressiveness of the medium (5). Therefore, the main objective is to evaluate the 3´-(2,6-dimethoxybenzoyl)-benzyl 2,6-dimethoxybenzoate (RM4) its capacity as corrosion inhibitor agent by means of electrochemical techniques in order to determine a new alternative corrosion inhibitor substance.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Evaluation of 3´-(2,6-dimethoxybenzoyl)-Benzyl 2,6-Dimethoxybenzoate As a Corrosion Inhibitor in API 5L X70 Immersed in Saline Medium

Olivé¹,

Vazquez²,

Mejía-Sánchez³

et al. 2023

ECS Trans.

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In the present work, the compound 3´-(2,6-dimethoxybenzoyl)-benzyl 2,6-dimethoxybenzoate (RM4) was evaluated for its ability as a corrosion inhibitor in a 3% chloride medium and using an API 5L X70 steel working electrode. The electrochemical system was evaluated by electrochemical techniques such as polarization curves (CP) and electrochemical impedance spectroscopy (EIS), finding through the values obtained in polarization curves that the efficiency of the inhibitor at 50 ppm reached 73.2% against the corrosion phenomenon. The inhibition kinetics study shows that the evaluated organic compound maintains its protection against corrosion in a period of 120 hours of immersion.

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Corrosion of Copper, Cupronickel, Nickel Aluminium Bronze and Super-Duplex Stainless Steel Rotating Cylinder Electrodes in Seawater under Turbulent Flow Conditions

Walsh,

Barker,

Stokes

et al. 2024

J. Electrochem. Soc.

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The corrosion of uncoated metals in a marine environment restricts the choice of suitable engineering metals and alloys. Both anodic dissolution of metal and cathodic reduction of oxygen are important processes. Formation of a surface oxide film can affect both electrode reactions. Charge transfer and mass transfer data can provide information on corrosion rate and mechanism. The RCE geometry offers the benefits of a controlled, turbulent flow of electrolyte, facilitating controlled fluid flow and mass transfer in a compact cell geometry which is well-suited to bench-top operation. These features are illustrated using a variety of electrochemical techniques, including open-circuit potential vs. time monitoring, linear sweep voltammetry, rotation speed step- or potential step current transients and linear polarisation resistance measurements. Seawater, which was taken from Langstone Harbour, Hampshire, UK, was filtered, air-saturated, pH 8.0 and maintained at 25 oC. Dimensionless group correlations and graphical plots (using an analogous approach to the Koutecky-Levich equation for an RDE) enabled contributions of charge transfer-, mixed- and mass transfer- controlled data to be appreciated, allowing the Tafel slopes of electrode reactions, the diffusion coefficient of dissolved oxygen, the mass transfer coefficient for oxygen reduction and the mean corrosion rate to be estimated.

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Kinetic Analysis of the X100 Steel Corrosion in Brine containing Inhibitor (Imidazoline) under different Turbulent Flow Conditions

Cited by 3 publications

References 46 publications

Electrochemical Behavior of Carbon Steel ASTM A36 in Diluted Pregnant Leach Solutions from Electrowinning of Copper

Electrochemical Behavior of Carbon Steel ASTM A36 in Diluted Pregnant Leach Solutions from Electrowinning of Copper

Electrochemical Evaluation of 3´-(2,6-dimethoxybenzoyl)-Benzyl 2,6-Dimethoxybenzoate As a Corrosion Inhibitor in API 5L X70 Immersed in Saline Medium

Corrosion of Copper, Cupronickel, Nickel Aluminium Bronze and Super-Duplex Stainless Steel Rotating Cylinder Electrodes in Seawater under Turbulent Flow Conditions

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