Effect of the Liquid Film Thickness on the CO<sub>2</sub>Corrosion of Steel

Tebbal, Saadedine; Hackerman, Norman

doi:10.5006/1.3577872

Cited by 3 publications

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“…One of the most important is naphthenic acid corrosion mechanism whose evolution is conditioned by different factors, where some are more important than others depending on the treatment area. (1). At atmospheric furnace tubes in Refinery Units, vaporization and fluid velocity are very high due to oil feed temperature is lower than the temperature of furnace tubes.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Analysis of Temperature, Concentration and Velocity Effects in Naphthenic Acid Corrosion of 5%Cr-1%Mo Steel

et al. 2015

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The effects of temperature, velocity and naphthenic acids concentration in the corrosive mechanism of 5%Cr-1%Mo steel were studied in a dynamic autoclave by Electrochemical Impedance spectroscopy and Potentiodynamic Polarization Curves with an electrochemical cell of three electrodes: reference and counter electrode was made of Au and working electrode was 5%Cr-1Mo sample. The sample was exposed to mineral oil-naphthenic acids solutions to different concentrations and atmospheric pressure. Contrary to the velocity effect, the temperature has a huge influence in the steel corrosion: to 180°C the steel exhibits lower corrosion rate, however, increasing temperature promotes the thermal composition of complex naphthenic acids, reflecting a reduction in electrochemical polarization resistance, increasing the corrosion rate. Moreover, the temperature is closely related to the concentration acid effect, since the kinetics of corrosion changes significantly when the system is subjected to higher temperatures. These results were complemented with surfaces characterizations by SEM and EDX.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Analysis of Temperature, Concentration and Velocity Effects in Naphthenic Acid Corrosion of 5%Cr-1%Mo Steel

et al. 2015

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“…One of the important cathodic reactions in the CO 2 corrosion process is the reduction of H + ions, thus pH plays an important role in the cathodic reaction. There is change in the pH immediately adjacent to the electrode surface in the electrolyte and it has a major effect on the physical properties of precipitates such as iron carbonate [3,4]. The decomposition will make the oxidation reaction extent that increases the corrosion rate in the environment where materials have become easily corroded.…”

Section: Introductionmentioning

confidence: 99%

“…This corrosion products form will dissolve in acidic solutions, but will be deposited in base solutions. Turbulent flow has also a significant influence on the corrosion mechanisms of steel in solution containing CO 2 [4,5]. In previous works [9,10], it have been obtained results that change of the flow conditions in the solution significantly increases the corrosion rate of steel.…”

Section: Introductionmentioning

confidence: 99%

Behavior of CO<sub>2</sub> Corrosion of API 5L X52 Steel in NaCl Solution under Turbulent Flow Condition

Rustandi

Adhika

Prima

et al. 2013

AMR

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The presence of carbon dioxide (CO2) and water in the fluid can cause severe internal corrosion in the pipelines. This study aims to observe corrosion behavior during the changes in flow rate and acidity conditions in order to obtain the relationship between the parameters by the measured corrosion rate. Corrosion rate measurements were performed for API 5L X52 steel material by using polarization method in 3.5% NaCl solution with saturated CO2 injection. Solution with different acidity were applied which has pH 4, 5, and 6 respectively. To simulate the flow rate, a Rotating Cylinder Electrode RCE was used at various rotation rates 0, 375, 750, 1500, and 3000 rpm, at room temperature (25°C) and atmospheric pressure. Based on testing results, the changes in rotation converted to flow rate showed that the corrosion mechanism of API 5L X52 steel in NaCl solution with saturated CO2 content was mainly controlled by mass transport at pH=4 whereas chemically controlled involved both at pH=5 and pH=6 conditions.

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Liquid film thickness and weak acids in the CO2 pitting of steel

Tebbal

Hackerman

1993

Corrosion Science

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Effect of the Liquid Film Thickness on the CO₂Corrosion of Steel

Cited by 3 publications

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Electrochemical Analysis of Temperature, Concentration and Velocity Effects in Naphthenic Acid Corrosion of 5%Cr-1%Mo Steel

Electrochemical Analysis of Temperature, Concentration and Velocity Effects in Naphthenic Acid Corrosion of 5%Cr-1%Mo Steel

Behavior of CO<sub>2</sub> Corrosion of API 5L X52 Steel in NaCl Solution under Turbulent Flow Condition

Liquid film thickness and weak acids in the CO2 pitting of steel

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Effect of the Liquid Film Thickness on the CO2Corrosion of Steel

Cited by 3 publications

References 0 publications

Electrochemical Analysis of Temperature, Concentration and Velocity Effects in Naphthenic Acid Corrosion of 5%Cr-1%Mo Steel

Electrochemical Analysis of Temperature, Concentration and Velocity Effects in Naphthenic Acid Corrosion of 5%Cr-1%Mo Steel

Behavior of CO<sub>2</sub> Corrosion of API 5L X52 Steel in NaCl Solution under Turbulent Flow Condition

Liquid film thickness and weak acids in the CO2 pitting of steel

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Effect of the Liquid Film Thickness on the CO₂Corrosion of Steel