Benzethonium chloride as a tungsten corrosion inhibitor in neutral and alkaline media for the post-chemical mechanical planarization application

Meethal, Ranjith Punathil; Jalalzai, Palwasha; Muskan,; Kumar, Sumit; Peter, Jerome; Klipp, Andreas; Kim, Tae-Gon; Park, Jin-Goo

doi:10.1016/j.jcis.2023.04.012

Cited by 8 publications

(8 citation statements)

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“…Adsorption isotherms explain the interactions between the inhibitors and active sites on the metal surface and the nature of the corrosion inhibition process. 78 The PDP data were fitted to various adsorption isotherms including Langmuir, Freundlich, El-Awady, Frumkin, Temkin, and Flory−Huggins. 78,79 Among them, the Langmuir adsorption isotherm was found to be the best in this study (Figure 12).…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…78 The PDP data were fitted to various adsorption isotherms including Langmuir, Freundlich, El-Awady, Frumkin, Temkin, and Flory−Huggins. 78,79 Among them, the Langmuir adsorption isotherm was found to be the best in this study (Figure 12). The Langmuir adsorption isotherm (eq 10) is commonly employed for the inhibitors as it shows a relationship between the inhibitor concentration (C inh ) and surface coverage.…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…The Langmuir adsorption isotherm (eq 10) is commonly employed for the inhibitors as it shows a relationship between the inhibitor concentration (C inh ) and surface coverage. 44,78 In this equation, K ads is the adsorption equilibrium constant, which reflects the strength between the adsorbate and adsorbent. The large value of K ads indicates more effective adsorption and higher inhibition efficiency 78,80 = + C K C 1 inh ads inh (10) The adsorption isotherm plot for the elongated OADs has a linear curve with the correlation coefficient (R 2 ) nearly equal to the unit (Table S2), which indicates that the chosen isotherm models are consistent with the inhibitors' adsorption on the CS surface.…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…44,78 In this equation, K ads is the adsorption equilibrium constant, which reflects the strength between the adsorbate and adsorbent. The large value of K ads indicates more effective adsorption and higher inhibition efficiency 78,80 = + C K C 1 inh ads inh (10) The adsorption isotherm plot for the elongated OADs has a linear curve with the correlation coefficient (R 2 ) nearly equal to the unit (Table S2), which indicates that the chosen isotherm models are consistent with the inhibitors' adsorption on the CS surface. The value of standard free energy of adsorption (ΔG ads o ) is used to describe the inhibitor's adsorption type and the stability of the protective layer.…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…The negative value of ΔG ads o refers to a strong interaction between the inhibitor molecules and the metal surface. 80 The ΔG ads o values less negative than −20 kJ mol −1 show physisorption (electrostatic interactions), and more negative values than −40 kJ mol −1 represent chemisorption 78,79 i k j j j y { z z z i k j j j j y 5 exp ads ads (11) As seen in Table S2, the average calculated ΔG ads o value for OADs at 25 °C is −33.3 kJ mol −1 , suggesting its adsorption on the CS surface is a mix-mode between physisorption and chemisorption. This led to the formation of a barrier film on the CS surface in a CO 2 -and H 2 S-saturated medium and significantly suppressed the corrosion rate.…”

Section: Adsorption Isothermmentioning

confidence: 99%

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Environmentally Friendly Antiagglomerants: A Promising Solution for Gas Hydrate Plugging and Corrosion Risk Management in Oil and Gas Pipelines

Tang,

Chen,

Farhadian

et al. 2024

Energy Fuels

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Gas hydrates pose a serious flow assurance challenge due to their ability to form, agglomerate, and block subsea flowlines on relatively fast time scales, leading to the loss of production and potential safety and environmental risks. The hydrate management strategy based on antiagglomerant inhibitors has gained significant interest in recent years, particularly in long tiebacks, maturing fields, and deep-water projects. However, most of the antiagglomerants used are not environmentally friendly, and compatibility issues with corrosion inhibitors also arise during coinjection operations. Here, a new oleic acid derivative was synthesized and used to develop two formulations (OADs) as green multifunctional flow assurance chemicals to control hydrate agglomeration and corrosion risks inside oil and gas pipelines. The experimental results showed that the OADs effectively inhibited methane hydrate growth and formed a transportable hydrate slurry in a water−paraffin mixture. Moreover, 0.1 wt % OADs completely suppressed the corrosion process of carbon steel in a CO 2 -and H 2 S-saturated solution by a protection of 99.4%. Computational studies also revealed that the adsorption of OADs on the hydrate surface increased its hydrophobicity, preventing the hydrate and water droplets from aggregating or clumping together. Additionally, OADs decreased the binding energy of iron and corrosive species up to 99.5%, and corrosive ions were almost no longer in direct contact with iron. The binding energy between the inhibitor and iron indicated the formation of a stable protective film by the OAD molecules on the steel surface to protect it against acidic corrosion. These results contribute to show the potential of oleic acid as a valuable green source to develop dual-purpose antiagglomerant hydrate and corrosion inhibitors for hydrate-related safety management.

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Section: Adsorption Isothermmentioning

confidence: 99%