Investigation of Acetic Acid Effect on Carbon Steel Corrosion in CO<sub>2</sub>–H<sub>2</sub>S Medium: Mechanistic Reaction Pathway and Kinetics

Talukdar, Anusuya; Rajaraman, Prasanna Venkatesh

doi:10.1021/acsomega.0c00387

Cited by 19 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in electrochemical terms, few differences were observed between conditions at 90°C, C1 (0 ppm of HAc) and C3 (100 ppm of HAc), mainly in terms of capacitive behaviour and LPR corrosion rates. Some authors have reported that an inhibitive effect might be seen with low concentrations of HAc up to 100 ppm due to a reduction on the anodic current [21,22,34]. In some cases, it might happen even without any corrosion layer deposition on the working electrode surface.…”

Section: Discussionmentioning

confidence: 99%

The role of acetic acid in FeCO₃ scale deposition on CO₂ corrosion of API X65 carbon steel under high temperatures

Santos

Souza

Serenário

et al. 2021

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

The combined effects of high temperatures and different acetic acid (HAc) concentrations on corrosion and deposition of FeCO 3 scales on API X65 carbon steel in CO 2 -saturated brines were investigated. Conditions with the absence and presence of 100 and 600 ppm of HAc were evaluated under high pressure at 90°C and 120°C. Electrochemical impedance spectroscopy, linear polarisation resistance, weight loss and characterisations through scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction were conducted. Conditions with the absence of acid presented a huge deposition of sweet corrosion products and low corrosion rates. The addition of 100 ppm of acid at 90°C did not increase significantly corrosion rates; however, it retarded the precipitation of FeCO 3 . Higher temperatures favoured iron carbonate nucleation even in the presence of HAc. The highest corrosion rates were observed for the environment with 600 ppm of HAc at 120°C.

show abstract

Section: Discussionmentioning

confidence: 99%

The role of acetic acid in FeCO₃ scale deposition on CO₂ corrosion of API X65 carbon steel under high temperatures

Santos

Souza

Serenário

et al. 2021

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

show abstract

“…Talukdar et al. showed that with the increase of acetic acid concentration in solution, the dissolution of carbon steel initially increases and then decreases, suggesting a complex role of acetate/acetic‐acid [12b] . A detailed understanding of surface adsorption properties of different carboxylic acids and associated anions will help us better understand their role in corrosion and corrosion inhibition.…”

Section: Introductionmentioning

confidence: 99%

pKa as a Predictive Descriptor for Electrochemical Anion Adsorption

Hasan,

McCrum

2024

Angewandte Chemie

View full text Add to dashboard Cite

The adsorption of anions onto metal surfaces is important in many applications including effective (electro)catalyst design, metal surface modification, and contaminant removal in wastewater treatment. In electrocatalysis, anions can be both reactive intermediates or site‐blocking spectators, where their adsorption strength therefore dictates the rate of reaction. In this work, we have measured the adsorption energy of a series of carboxylic acids on a Pt (111) single‐crystal electrode surface from aqueous solution. We find that the adsorption strength of the carboxylate anion is linearly correlated with its acid‐dissociation constant (pKa) and therefore the heterolytic O‐H bond dissociation strength in solution. Using density functional theory modeling, we split the anion adsorption energy into a sum of the adsorption energy and electron affinity of a neutral (carboxyl) radical. Surprisingly, the adsorption energy of the carboxyl radicals are similar and therefore the large difference in electron affinity is what dictates anion adsorption strength; the greater the cost in energy to remove the electron from the anion upon adsorption, the weaker its binding. Therefore, at least within a class of anions with similar structure and surface binding atoms, both electron affinity and acidity are predictive descriptors of adsorption strength.

show abstract

“…The results show that the presence of acetic acid causes an increase in the corrosion rate because the corrosion product of iron acetate has greater solubility compared with iron bicarbonate. The studies of Talukdar et al [ 17 ] indicate that in a CO 2 -H 2 S solution, at lower concentrations of acetic acid, the corrosion rate of carbon steel increases, while at higher concentrations of acetic acid, the corrosion rate decreases but pitting corrosion is observed. This is because the presence of more H + ions, supplied by HAc, reduces the adsorption of H 2 S species on carbon steel, resulting in a lower anodic dissolution rate.…”

Section: Introductionmentioning

confidence: 99%

Effect of HAc on the Metastable Pitting Corrosion of 304 SS in NaCl Solution

Zhang¹,

Huang

Wei

et al. 2022

Materials

View full text Add to dashboard Cite

Stainless steels (SSs) easily suffer localized corrosion damage, such as pitting corrosion, in mixed solutions of acetic acid and sodium chloride. Currently, few works have been focused on the early stages of the pitting corrosion (metastable pitting corrosion) process of SSs in a chloride-HAc mixture solution. In this work, the effects of acetic acid (HAc) and its concentration on metastable pitting corrosion and the uniform corrosion of 304 SS in 0.6 mol/L NaCl solution were investigated by a slow-scanning potentiodynamic polarization test, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The results show that the uniform corrosion rate of 304 SS increases after HAc addition but, with an increase in HAc concentration, the corrosion rate decreases. In the presence of HAc, the metastable pitting potential (Em) and stable pitting potential (Eb) move negatively, but the number of metastable pits notably decreases. HAc has a promoting action on the growth rate of the metastable pits and facilitates the transition from metastable pits to stable pits. The influence of HAc is related to a decrease in solution pH and the chemical adsorption of HAc.

show abstract

Investigation of Acetic Acid Effect on Carbon Steel Corrosion in CO₂–H₂S Medium: Mechanistic Reaction Pathway and Kinetics

Cited by 19 publications

References 25 publications

The role of acetic acid in FeCO₃ scale deposition on CO₂ corrosion of API X65 carbon steel under high temperatures

The role of acetic acid in FeCO₃ scale deposition on CO₂ corrosion of API X65 carbon steel under high temperatures

pKa as a Predictive Descriptor for Electrochemical Anion Adsorption

Effect of HAc on the Metastable Pitting Corrosion of 304 SS in NaCl Solution

Contact Info

Product

Resources

About

Investigation of Acetic Acid Effect on Carbon Steel Corrosion in CO2–H2S Medium: Mechanistic Reaction Pathway and Kinetics

Cited by 19 publications

References 25 publications

The role of acetic acid in FeCO3 scale deposition on CO2 corrosion of API X65 carbon steel under high temperatures

The role of acetic acid in FeCO3 scale deposition on CO2 corrosion of API X65 carbon steel under high temperatures

pKa as a Predictive Descriptor for Electrochemical Anion Adsorption

Effect of HAc on the Metastable Pitting Corrosion of 304 SS in NaCl Solution

Contact Info

Product

Resources

About

Investigation of Acetic Acid Effect on Carbon Steel Corrosion in CO₂–H₂S Medium: Mechanistic Reaction Pathway and Kinetics

The role of acetic acid in FeCO₃ scale deposition on CO₂ corrosion of API X65 carbon steel under high temperatures

The role of acetic acid in FeCO₃ scale deposition on CO₂ corrosion of API X65 carbon steel under high temperatures