Local supersaturation and the growth of protective scales during CO2 corrosion of steel: Effect of pH and solution flow

Sk, Mobbassar Hassan; Abdullah, Aboubakr M.; Ko, Monika; Ingham, Bridget; Laycock, N.J.; Arul, Rakesh; Williams, David E.

doi:10.1016/j.corsci.2017.05.026

Cited by 63 publications

(87 citation statements)

References 38 publications

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“…The samples were cut to 15 mm length pieces which were then inner-threaded from one end, ultrasonically cleaned with n-butane for 10 min, washed with distilled water and dried. The samples were then mounted using epoxy resin into a poly(tetrafluoroethylene) (PTFE) shield 21 and, unless otherwise stated, the exposed surface was ground to a 15 μm finish using silicon carbide paper.…”

Section: Methodsmentioning

confidence: 99%

“…The pH was altered by adding controlled amounts of 2 M NaOH (SI: table S1, Ref. 21), measured at room temperature with a laboratory pH meter and calculated at elevated temperature based on the equilibrium of ionic species in the solution with CO 2 at fixed partial pressure (data sources for carbonate equilibrium constants, water vapor pressure, Henry's law constant for CO 2 and activity coefficients in aqueous NaCl as a function of temperature given in Ref. 30).…”

Section: Methodsmentioning

confidence: 99%

“…32 Electrochemistry flow (RDE) experiments.-The apparatus is shown in the SI of Ref. 21. The electrochemical tests were carried out in a 1 L double-jacketed glass cell.…”

Section: Methodsmentioning

confidence: 99%

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The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO₂-Saturated (Sweet) Brine under Hydrodynamic Control

Sk¹,

Abdullah²,

Qi³

et al. 2018

J. Electrochem. Soc.

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The effects of micro-alloying of plain carbon steel with Cr and Mo on the corrosion behavior in CO 2-saturated (sweet) brine (0.5 M NaCl, pH 6.6) environment, under hydrodynamic conditions, at 80 • C were investigated. Crystalline siderite/chukanovite scales formed on all the alloys. Analysis of potentiostatic current transient data suggest that there exists a synergistic interaction between Cr and Mo, which induces more rapid crystallization of the scale compared to Mo-free steels. Increasing the Mo content also suppressed the transport-dependent dissolution current passing through the initially-present amorphous surface film. TEM images of the FIB-sectioned corrosion scales confirm that the corrosion scale formed on 1Cr0.7Mo is comparatively thinner and yet offers greater protectiveness when compared to the plain carbon steel.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO₂-Saturated (Sweet) Brine under Hydrodynamic Control

Sk¹,

Abdullah²,

Qi³

et al. 2018

J. Electrochem. Soc.

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“…CO 2 corrosion is responsible for the failure of pipelines, tubing, and equipment, resulting in great economic losses and accidents. [4][5][6] In addition, CO 2 corrosion results in crude oil leakage and subsequent environmental pollution, having an impact also on downstream industries. 7,8 The aqueous CO 2 corrosion of carbon steels observed in the oil and gas industries is, by nature, a complex process involving a number of simultaneous electrochemical, chemical, and mass transport reactions taking place close to the corroding steel surface simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Fundamental aspects of the corrosion of N80 steel in a formation water system under high CO₂ partial pressure at 100 °C

Li²,

Zhang

et al. 2019

RSC Adv.

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“…12. Therefore, the complex PEI film on the steel surface act as a barrier which hinder the aggressive ions to penetrate to the steel surface as well as prohibiting the Fe dissolution 38,[84][85][86][87] .…”

Section: Thermodynamic Activation Parameters and Inhibition Mechanismmentioning

confidence: 99%

Electrochemical and thermodynamic study on the corrosion performance of API X120 steel in 3.5% NaCl solution

Shahzad

Sliem

Shakoor

et al. 2020

Sci Rep

Self Cite

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The present work studied the effect of temperature on the corrosion behavior of API X120 steel in a saline solution saturated with co 2 in absence and presence of polyethyleneimine (pei) as an environmentally safe green inhibitor. The effect of PEI on the corrosion behavior of API X120 steel was investigated using destructive and non-destructive electrochemical techniques. The overall results revealed that PEI significantly decreases the corrosion rate of API X120 steel with inhibition efficiency of 94% at a concentration of 100 μmol L −1. The adsorption isotherm, activation energy and the thermodynamic parameters were deduced from the electrochemical results. It is revealed that the adsorption of PEI on API X120 steel surface follows Langmuir adsorption isotherm adopting a Physichemisorption mechanism. Finally, the samples were characterized using scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques to elucidate the effect of aggressiveness of corrosive media on the surface morphology and the corrosion performance of API X120 steel. The surface topography result indicates that the API X120 steel interface in PEI presence is smoother than co 2 with cl − ions or cl − ions only. This is attributed to the compact protective film limits the aggressive ions transfer towards the metallic surface and reduces the corrosion rate. Moreover, PEI inhibition mechanism is based on its co 2 capturing ability and the PEI adsorption on the steel surface beside the siderite layer which give the PEI molecules the ability to reduce the scale formation and increase the corrosion protection due to capturing the CO 2 from the brine solution. High strength low alloy (HSLA) steels are widely finding its applications in oil & gas industry, thermal power plants and in aerospace industry etc. due to its improved mechanical properties, superior corrosion resistance and weldability when compared with plain carbon steel 1-4. Series of comparative studies have been focused on HSLA pipelines steels in order to understand the effect of alloying elements, heat treatments and other changeable factors on their mechanical properties and microstructure 5-8. it has been reported that the yield strength of the API X120 steel is in range 780-951 MPa based on the shape of the specimen. Moreover, the tensile strength is varied from 940 to 1023 MPa and the strength is more than X120 ksi and reaches to X120 grade according to the API standards 9-11. Corrosion is the major problem that compact the API X120 steel pipelines in the transportation of oil, gas. There are a myriad number of studies that investigate the influence of carbon dioxide with saline solution on the corrosion mechanism of different grades of steel pipelines employed in the pipeline applications 12,13. Additionally, it has been reported that the presence of carbonate ions in oilfield brine solution increases the corrosion rate of the pipelines 14-16. Several parameters have been noted for the corrosion of steel in CO 2 environment such as PH, temperature, CO 2 pres...

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Local supersaturation and the growth of protective scales during CO2 corrosion of steel: Effect of pH and solution flow

Cited by 63 publications

References 38 publications

The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO₂-Saturated (Sweet) Brine under Hydrodynamic Control

The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO₂-Saturated (Sweet) Brine under Hydrodynamic Control

Fundamental aspects of the corrosion of N80 steel in a formation water system under high CO₂ partial pressure at 100 °C

Electrochemical and thermodynamic study on the corrosion performance of API X120 steel in 3.5% NaCl solution

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Local supersaturation and the growth of protective scales during CO2 corrosion of steel: Effect of pH and solution flow

Cited by 63 publications

References 38 publications

The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO2-Saturated (Sweet) Brine under Hydrodynamic Control

The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO2-Saturated (Sweet) Brine under Hydrodynamic Control

Fundamental aspects of the corrosion of N80 steel in a formation water system under high CO2 partial pressure at 100 °C

Electrochemical and thermodynamic study on the corrosion performance of API X120 steel in 3.5% NaCl solution

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The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO₂-Saturated (Sweet) Brine under Hydrodynamic Control

The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO₂-Saturated (Sweet) Brine under Hydrodynamic Control

Fundamental aspects of the corrosion of N80 steel in a formation water system under high CO₂ partial pressure at 100 °C