Corrosion inhibition and adsorption behaviour of some bis-pyrimidine derivatives on mild steel in acidic medium

Anusuya, N.; Jagadeesan, Saranya; Palanisamy, Subramanian; Zarrouk, A.; Chitra, S.

doi:10.1016/j.molliq.2016.11.015

Cited by 114 publications

(24 citation statements)

References 38 publications

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“…However, if S 1 values approach unity, it means that there is no interaction between potassium iodide and the AEO7 molecule. If S 1 values are less than unity, an antagonistic behavior is expected which is a characteristics of a competitive adsorption process 69,71,72 . The synergism is originated from the double role that iodide ions play.…”

Section: Resultsmentioning

confidence: 99%

AEO7 Surfactant as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in HCl solution

Sliem

Afifi

Radwan

et al. 2019

Sci Rep

104

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The impact of AEO7 surfactant on the corrosion inhibition of carbon steel (C-steel) in 0.5 M HCl solution at temperatures between 20 °C and 50 °C was elucidated using weight loss and different electrochemical techniques. The kinetics and thermodynamic parameters of the corrosion and inhibition processes were reported. The corrosion inhibition efficiency (IE%) improved as the concentration of AEO7 increased. In addition, a synergistic effect was observed when a concentration of 1 × 10−3 mol L−1 or higher of potassium iodide (KI) was added to 40 µmol L−1 of the AEO7 inhibitor where the corrosion IE% increased from 87.4% to 99.2%. Also, it was found that the adsorption of AEO7 surfactant on C-steel surface followed the Freundlich isotherm. Furthermore, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements indicated that AEO7 was physically adsorbed on the steel surface. The surface topography was examined using an optical profilometer, an atomic force microscope (AFM), and a scanning electron-microscope (SEM) coupled with an energy dispersion X-ray (EDX) unit. Quantum chemical calculations based on the density functional theory were performed to understand the relationship between the corrosion IE% and the molecular structure of the AEO7 molecule.

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Section: Resultsmentioning

confidence: 99%

AEO7 Surfactant as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in HCl solution

Sliem

Afifi

Radwan

et al. 2019

Sci Rep

104

View full text Add to dashboard Cite

show abstract

“…As reported, the adsorption equilibrium constant (K ads ), and the standard adsorption free energy Δ퐺 0 ads are the primary adsorption factors in corrosion inhibition investigations [49,50]. ese two parameters are linked by the following equation [39]:…”

Section: Adsorption Isotherm and Mechanism Of Corrosionmentioning

confidence: 99%

“…e positive sign of the enthalpy values is principally associated with endothermic nature of the corrosion process of C38 steel, meaning the slow dissolution of C38 steel in the presence of the HECG [64,65].…”

Section: Ermodynamic Parametersmentioning

confidence: 99%

Electrochemical and Thermodynamic Investigation on Corrosion Inhibition of C38 Steel in 1M Hydrochloric Acid Using the Hydro-Alcoholic Extract of Used Coffee Grounds

Bouhlal

Labjar

Abdoun

et al. 2020

International Journal of Corrosion

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The present work investigates the influence of temperature on C38 steel corrosion in a 1 M HCl medium with and without different concentrations of a hydro-alcoholic extract of used coffee grounds (HECG). The potentiodynamic polarization technique and the electrochemical impedance spectroscopy were performed in temperatures ranging from 293.15 to 323.15 K. It was observed that the inhibition efficiency decreased with increased temperature and inhibitor concentration. The HECG adsorption process on C38 steel surface was found to be spontaneous and obeyed to Langmuir isotherm at all studied temperatures. The associated thermodynamic parameters of adsorption led to suggest the occurrence of physical adsorption of the HECG compounds on the C38 steel surface.

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“…), homo-atomic (>C=C<, -C≡C-) and heteroatomic (>C=O, >C=S, -C=N-, -N=O, -C≡N, etc.) multiple bond of carbocyclic and heterocyclic rings facilitate the adsorption of organic inhibitors on metal surfaces [18][19][20]. Generally, in strongly acidic media most of the organic inhibitors exist in their cationic (positive) form as their heteroatoms easily undergo protonation, while in the same environment metallic surface exist in the negative forms due to adsorption of anionic counter ions (e.g.…”

Section: Economic Importancementioning

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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Corrosion inhibition and adsorption behaviour of some bis-pyrimidine derivatives on mild steel in acidic medium

Cited by 114 publications

References 38 publications

AEO7 Surfactant as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in HCl solution

AEO7 Surfactant as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in HCl solution

Electrochemical and Thermodynamic Investigation on Corrosion Inhibition of C38 Steel in 1M Hydrochloric Acid Using the Hydro-Alcoholic Extract of Used Coffee Grounds

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

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