Multiphasic inhibition of mild steel corrosion in H 2 S gas environment

The inhibitory activity of the expired egg-white carbon steel (CS) extract in HCl solution was studied in this article. The extract was examined using FT-IR, and the surface was examined using a scanning electron microscope (SEM) and energy-dispersive X-ray analysis (EDX). Weight loss techniques at various temperatures were used to examine corrosion investigations (298, 308, 318, and 328 K), concentrations (100, 200, 400, and 800 mg. L−1) of extracts, and electrochemical measurements (potentiodynamic polarization (PDP) and impedance spectroscopy (EIS) at 25°C and different concentrations. Results. Results obtained through EIS demonstrated a maximal inhibition efficiency of 90% at an inhibitor concentration of 800 mg. L−1. Moreover, the findings of the potentiodynamic polarization indicated that egg-white extract was a mixed type of inhibitor and slowed down both cathodic and anodic reactions. For weight loss analysis, an inhibitory potency (89, 83, 77, and 71%) at various temperatures (298, 308, 318, and 328 K) was demonstrated, respectively. It indicates that the temperature rise contributes to a decrease in the resistance of the carbon steel. The adsorption of the expired egg-white extract was spontaneous with physisorption and chemisorption according to the Langmuir isotherm model, according to adsorption isotherm studies.

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“…e C-H2 bands are observed around 1460 cm −1 and 1396 cm −1 . e bands between 1360 and 1080 cm −1 are assigned to the C-N bands [36].…”

Section: Ft-ir Spectroscopy Resultsmentioning

confidence: 99%

Expired Chicken Egg-White Extract’s Adsorption Behavior As a Corrosion Inhibitor for Carbon Steel in 1M HCl

Elqars

Guennoun

Ouarhach

et al. 2021

Journal of Chemistry

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“…Results showed that all studied compounds and their mixtures inhibit mild steel corrosion by passivating the metallic surface and the extent of passivation mainly depends upon nature of pH. Kannan and coworkers [69] demonstrated inhibition property of several VCIs namely, octylsteramide (OTS), octylpalmamide (OTP), octylbenzamide (OTB) octylcaprylamide (OTC) and Dicyclohexylaminebenzotriazole (DCHAB) on mild steel corrosion in H 2 S medium. Inhibition efficiency of the tested VCI molecules have been evaluated using weight, electrochemical and surface measurement methods.…”

Section: Vci As Corrosion Inhibitors For Ferrous Materialsmentioning

confidence: 99%

Volatile corrosion inhibitors for ferrous and non-ferrous metals and alloys: A review

Ansari¹,

Verma²,

Siddiqui³

et al. 2018

Int. J. Corros. Scale Inhib.

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Volatile corrosion inhibitors (VCIs) or vapor phase inhibitors (VPIs) represent a class of compounds that are employed to protect the corrosion or oxidation of ferrous and nonferrous metals and alloys where other surface treatments are impractical. The VCIs release slowly inside the sealed airspace and actively adsorb and prevent corrosion. Several VCIs have been employed as effective inhibitors for several metals like iron, zinc, aluminum, etc. and their alloys. Literature study revealed that VCIs protect metallic corrosion either by forming a surface protective film on the metal surface or neutralizing the corrosive surrounding reagents H 2 O, SO 2 , H 2 S and CO 2 , etc. Because of the high volatility, VCIs easily vaporize and their vapors condense on the metallic surface as well as the volume available in the crevices, pores and cracks thereby gives complete protection where they used. The VCIs can be inserted into coatings, foams, adhesives, powders, sprays and plastics. Several VCIs are known those act as effective inhibitors by themselves and few other VCIs are also known those hydrolyzed products act as corrosion inhibitors. The inhibition ability as well as quantity of the adsorbed VCIs on metallic surfaces can be determined by several commonly employed techniques such as contact angle, radiotracer, polarographic and electrocapilarity methods. Present review article describes the assortment of previous works published on VCIs as corrosion inhibitors for ferrous and non-ferrous metals and alloys. The present report also deals with salient features of VCIs and mechanism of their action.

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“…The value of E a in the inhibited solution (at least 26.38 kJ mol −1 for DPIP and 26.35 kJ mol −1 for OPIP) is higher than that in the blank solution and is 8.2 kJ mol −1 . It is well known that a higher value of the E a than without inhibitors means that the inhibitors offer a thin adsorption film on the mild steel surface that creates a physical barrier for charge and mass transfer (Kannan et al, 2014). In addition, the activation energy was augmented with the increased inhibitors concentration, indicating that the dissolution rate of mild steel decreased in the corrosive medium (Sliem et al, 2019).…”

Section: Thermodynamic Activation Parameters For Dpip and Opipmentioning

confidence: 99%

Imidazo [1,2-a] Pyrimidine Derivatives as Effective Inhibitor of Mild Steel Corrosion in HCl Solution: Experimental and Theoretical Studies

Cao

Huang

et al. 2022

Front. Mater.

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The inhibitory performance of imidazole [1,2-a] pyrimidine derivatives, namely, 2,4-diphenylbenzo [4,5]imidazo [1,2-a]pyrimidine (DPIP) and 2-(4-octylphenyl)-4-phenylbenzo [4,5]imidazo [1,2-a]pyrimidine (OPIP), against mild steel corrosion in 1 mol L−1 HCl solution was studied by weight loss at different temperatures, potentiodynamic polarization curves (PDP), electrochemical impedance spectroscopy (EIS), and surface analysis technology. The two corrosion inhibitors showed an outstanding inhibition performance, and the inhibition efficiency achieved 91.9% for OPIP and 90.5% for DPIP at a concentration of 0.1 mmol L−1. Electrochemical methods showed that DPIP and OPIP behaved as mixed-type inhibitors. Density function theory (DFT) and molecular dynamic simulation (MD) were approached to theoretically study the relationship of the inhibitor structure and anti-corrosion performance, which were also compatible with the weight loss and electrochemical observations.

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Multiphasic inhibition of mild steel corrosion in H 2 S gas environment

Cited by 26 publications

References 13 publications

Expired Chicken Egg-White Extract’s Adsorption Behavior As a Corrosion Inhibitor for Carbon Steel in 1M HCl

Expired Chicken Egg-White Extract’s Adsorption Behavior As a Corrosion Inhibitor for Carbon Steel in 1M HCl

Volatile corrosion inhibitors for ferrous and non-ferrous metals and alloys: A review

Imidazo [1,2-a] Pyrimidine Derivatives as Effective Inhibitor of Mild Steel Corrosion in HCl Solution: Experimental and Theoretical Studies

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