Synthesis and characterization of some nonionic surfactants as corrosion inhibitors for steel in 1.0 M HCl (Experimental and computational study)

Bedair, Mahmoud A.; Soliman, S. A.; Metwally, Mohamed

doi:10.1016/j.jiec.2016.07.005

Cited by 60 publications

(27 citation statements)

References 53 publications

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“…Further, 92.5, 94.2, 94.6% was the inhibition efficiency for weight loss, PDP, and EIS, respectively, at 10 –3 M concentration of the studied inhibitor. 20 , 21 …”

Section: Introductionmentioning

confidence: 99%

Anticorrosion Effect of Ethoxylate Sulfanilamide Compounds on Carbon Steel in 1 M Hydrochloric Acid: Electrochemical and Theoretical Studies

et al. 2021

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Metal corrosion is an important economic problem globally. One of the best ways to protect metal surfaces from corrosion is by the use of corrosion inhibitors, especially surfactants. This study assesses anticorrosion properties of three inhibitor compounds (S1, S2, and S3) of ethoxylate sulfanilamide containing 2, 10, and 20 units of ethylene oxide on carbon steel in 1 M HCl solution. The anticorrosive performance of S1, S2, and S3 was studied using potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), adsorption isotherm, surface tests (scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, and X-ray diffraction (XRD) analysis), and computational studies (density functional theory (DFT) and molecular dynamics (MD) simulations) within the concentration range of 10 –6 to 10 –2 M at 30 ± 2 °C. The results of the methods used indicate that increasing the concentration of the inhibitor compounds improves the effectiveness of inhibition (from 50.9 to 98%), whereas the inhibition efficiency order for ethoxylated sulfanilamide compounds is S2 > S3 > S1 with the highest inhibiting efficiency, respectively, of 98.0, 95.0, and 90.0% for 10 –2 M. Also, PDP indicated that S1, S2, and S3 inhibitors act as mixed-type inhibitors and their adsorption obeys the Langmuir adsorption isotherm model. Surface tests show that the studied compounds can significantly inhibit acid attack via chemical adsorption on the metal. Furthermore, all of the chemical descriptors derived from DFT indicate that the three inhibitors are quite well adsorbed by the adhesion centers on the CS surface. The three compounds’ molecular geometries and electronic structures were calculated using quantum chemical calculations. Using theoretical computations, the energy difference between the highest occupied molecular orbital and the lowest occupied molecular orbital has been determined to represent chemical reactivity and kinetic stability of a composition.

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“…Further, 92.5, 94.2, 94.6% was the inhibition efficiency for weight loss, PDP, and EIS, respectively, at 10 –3 M concentration of the studied inhibitor. 20 , 21 …”

Section: Introductionmentioning

confidence: 99%

Anticorrosion Effect of Ethoxylate Sulfanilamide Compounds on Carbon Steel in 1 M Hydrochloric Acid: Electrochemical and Theoretical Studies

et al. 2021

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“…Calculated ΔG ads value for I 1 is 36.09–38.43 kJ/mol and for I 2 is 35.92–37.87 kJ mol −1 . As ΔG ads is negative, it reveals the spontaneous adsorption process and stability of the adsorbed layer . It is well known that if ΔG ads value is < ‐ 20 kJ mol −1 it is physorption and if > ‐ 40 kJ mol −1 it is chemisorption .…”

Section: Resultsmentioning

confidence: 98%

Adsorption Effect of Five‐Membered and Six‐Membered Alicyclic Amine‐Derived Mannich Bases on Mild Steel Surface in 1.0 M HCl

Nesaian

Prabhu

2017

ChemistrySelect

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Two new Mannich bases N‐(3‐(benzo[d][1, 3]dioxol‐5‐yl(pyrrolidin‐1‐yl)methyl)‐4‐hydroxyphenyl)acetamide (I1) and N‐(3‐(benzo[d][1, 3]dioxol‐5‐yl(morpholino)methyl)‐4‐hydroxyphenyl) acetamide (I2) are synthesised and evaluated their corrosion inhibition behaviour through weight loss measurements, electrochemical, quantum chemical and surface analytical studies. Tafel studies revealed that the inhibitors are found to be mixed type. EIS studies confirmed that corrosion process is controlled through charge transfer process. The adsorption of inhibitors I1 and I2 follows Langmuir adsorption isotherm and ΔGads values suggest that both physorption and chemisorption are possible. Surface studies show that in the presence of inhibitors, smoother surface is obtained compared to blank. I1 has higher inhibition efficiency (50 μM −98%) than I2 (50 μM −94%) which is correlated with the theoretical studies.

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“…Where k is the corrosion rate (mg cm -2 h -1 ), ΔW is the loss of weight after corrosion (mg), A is the total area of the coupon (cm 2 ), and t is the corrosion time (h). The degree of surface coverage (θ) and the inhibition efficiency, w %, were calculated using the following equations [21]:…”

Section: K=δw /Atmentioning

confidence: 99%

Study of Antioxidant and Anticorrosion Activity of Some Microwave Synthesized Thiourea Derivative Ligands and Complexes

Hassan¹,

Elbialy²,

Wahdan³

2020

SIJCMS

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Synthesis and characterization of some nonionic surfactants as corrosion inhibitors for steel in 1.0 M HCl (Experimental and computational study)

Cited by 60 publications

References 53 publications

Anticorrosion Effect of Ethoxylate Sulfanilamide Compounds on Carbon Steel in 1 M Hydrochloric Acid: Electrochemical and Theoretical Studies

Anticorrosion Effect of Ethoxylate Sulfanilamide Compounds on Carbon Steel in 1 M Hydrochloric Acid: Electrochemical and Theoretical Studies

Adsorption Effect of Five‐Membered and Six‐Membered Alicyclic Amine‐Derived Mannich Bases on Mild Steel Surface in 1.0 M HCl

Study of Antioxidant and Anticorrosion Activity of Some Microwave Synthesized Thiourea Derivative Ligands and Complexes

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