scholarly journals Inhibitive Effect by Acid Extract of Ficus Exasperata Leaves on the Sulphuric Acid Corrosion of Mild Steel

2009 ◽  
Vol 6 (s1) ◽  
pp. S189-S194 ◽  
Author(s):  
N. S. Patel ◽  
S. Jauhari ◽  
G. N. Mehta
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Electrochemical Impedance ◽  
Electron Microscopic ◽  
Scanning Electron Microscopic ◽  
Microscopic Studies ◽  
Scanning Electron

Extract ofFicus exasperataleaves was investigated as corrosion inhibitor of mild steel in 1 N H2SO4using conventional weight loss, electrochemical polarizations, electrochemical impedance spectroscopy and scanning electron microscopic studies. The weight loss results showed that the extract ofFicus exasperatais excellent corrosion inhibitor. Electrochemical polarizations data revealed the mixed mode of inhibition. The results of electrochemical impedance spectroscopy shows that the change in the impedance parameters, charge transfer resistance and double layer capacitance, with the change in concentration of the extract is due to the adsorption of active molecules leading to the formation of a protective layer on the surface of mild steel. Scanning electron microscopic studies provided the confirmatory evidence of improved surface condition, due to the adsorption, for the corrosion protection.

The Effect of Corrosion Inhibitor in Hydrofluoric Acid Medium

2013 ◽  
Vol 750-752 ◽  
pp. 2258-2262 ◽  
Author(s):  
Wei Ming Wu ◽  
Ding Li ◽  
Hai Yan Du
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Hydrofluoric Acid ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Potassium Thiocyanate ◽  
Inhibition Effect

The experiments were done to find some good corrosion inhibitors for mild steel in 5% HF solution by the method of weight loss and electrochemistry including polarization curves and electrochemical impedance spectroscopy (EIS). Results show that the thiourea, potassium thiocyanate, and hexamethylenetetramine have good inhibition effect for mild steel in 5% HF solution, especially potassium thiocyanate and thiourea. Their corrosion resistance was greatly enhanced in the presence of tested inhibitor. Thiourea is an anodic type inhibitor and its inhibition efficiencies up to 99.88% can be obtained. Equivalent circuit of the investigated system was suggested.

Inhibition effect of E and Z conformations of 2-pyridinealdazine on mild steel corrosion in phosphoric acid

2017 ◽  
Vol 64 (1) ◽  
pp. 23-35 ◽  
Author(s):  
Mohammed Elalaoui Belghiti ◽  
Ayssar Nahlé ◽  
Abdeslam Ansari ◽  
Yasser Karzazi ◽  
S. Tighadouini ◽  
...  
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Content Type ◽  
Inhibition Effect ◽  
Tafel Polarization ◽  
Mild Steel Corrosion

Purpose This paper aims to study the inhibition effect of 2-pyridinealdazine on the corrosion of mild steel in an acidic medium. The inhibition effect was studied using weight loss, electrochemical impedance spectroscopy, and Tafel polarization measurements. Design/methodology/approach Weight loss measurements, potentiodynamic tests, electrochemical impedance spectroscopy, X-ray diffraction and spectral and conformational isomers analysis of A (E-PAA) and B (Z-PAA) were performed were investigated. Findings 2-pyridinealdazine (PAA) acts as a good inhibitor for the corrosion of steel in 2.0 M H3PO4. The inhibition efficiency increases with an increase in inhibitor concentration but decreases with an increase in temperature. Originality/value This paper is intended to be added to the family of azines which are highly efficient inhibitors and can be used in the area of corrosion prevention and control.

Methionine as Corrosion Inhibitor of Brass in O2-Free 1M NaOH Solution

2011 ◽  
Vol 308-310 ◽  
pp. 241-245 ◽  
Author(s):  
Jin Fang Wu ◽  
Qing Wang ◽  
Steng Tao Zhang ◽  
Lin Liang Yin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Corrosion Inhibitor ◽  
Corrosion Test ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Naoh Solution ◽  
Scanning Electron

Methionine (MET) as a corrosion inhibitor for brass in O2-free 1M NaOH solution was investigated using weight loss, polarization curves, electrochemical impedance spectroscopy(EIS). The surface morphology after corrosion test was observed by scanning electron microscopy (SEM). Results indicate that MET is a cathodic inhibitor, and the inhibition efficiency increases with MET concentration.

Essential oil of “Foeniculum vulgare”: antioxidant and corrosion inhibitor on mild steel immersed in hydrochloric medium

2017 ◽  
Vol 64 (5) ◽  
pp. 563-572 ◽  
Author(s):  
Asmae Bouoidina ◽  
Mehdi Chaouch ◽  
Abdelfattah Abdellaoui ◽  
Amal Lahkimi ◽  
Belkheir Hammouti ◽  
...  
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Electrochemical Impedance ◽  
Gas Chromatography Mass Spectrometry ◽  
Foeniculum Vulgare ◽  
Content Type ◽  
Tafel Polarization ◽  
Electron Microscopy Analysis

Purpose The inhibition effect of Foeniculum vulgare seeds’ (FVS) extract on the corrosion of mild steel in acidic medium was studied using weight loss, electrochemical impedance spectroscopy and Tafel polarization, as well as the surface morphology of the mild steel. Design/methodology/approach Weight loss measurements, potentiodynamic tests, electrochemical impedance spectroscopy studies and gas chromatography/mass spectrometry and scanning electron microscopy analysis of FVS extract were performed. Findings FVS extract acts as a good inhibitor for the corrosion of mild steel in 1.0 M HCl. The inhibition efficiency increases with the increase in inhibitor concentration but decreases with the increase of temperature. Practical implications FVS extract was observed to play an important role in the corrosion inhibition of mild steel in acidic solution. Originality/value This paper is intended to be added to the family of green inhibitors which are highly efficient inhibitors and can be used in the area of corrosion prevention and control.

1,7′-dimethyl-2′-propyl-1H,3′H-2,5′-bibenzo[d]imidazole as a corrosion inhibitor of mild steel in 1 M HCl

2010 ◽  
Vol 64 (1) ◽  
Author(s):  
Niketan Patel ◽  
Smita Jauhari ◽  
Girishkumar Mehta
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Mass Loss ◽  
Corrosion Inhibitor ◽  
Electrochemical Impedance ◽  
Protective Layer ◽  
Charge Transfer Resistance ◽  
Active Centers ◽  
Transfer Resistance

AbstractInhibition effect of imidazole derivative 1,7′-dimethyl-2′-propyl-1H,3′H-2,5′-bibenzo[d]imidazole (DPBI) against mild steel corrosion in 1 M HCl solutions was evaluated using the conventional mass loss method, potentiodynamic polarization, linear polarization, and electrochemical impedance spectroscopy. The mass loss results showed that DPBI is an excellent corrosion inhibitor; electrochemical polarizations data revealed the mixed mode of inhibition; and the results of electrochemical impedance spectroscopy showed that the change in the impedance parameters, charge transfer resistance, and double layer capacitance with the change in the concentration of the inhibitor is due to the adsorption of the molecule leading to the formation of a protective layer on the surface of mild steel. The inhibition action of this compound was assumed to occur via adsorption on the steel surface through the active centers of the molecule.

scholarly journals The mixture of dicyclohexilamine and oleylamine as corrosion inhibitor for mild steel in NaCl solution saturated with CO2 under both continual immersion and top of the line corrosion

2012 ◽  
Vol 77 (8) ◽  
pp. 1047-1061 ◽  
Author(s):  
Ivana Jevremovic ◽  
Aleksandra Debeljkovic ◽  
Marc Singer ◽  
Mohsen Achour ◽  
Srdjan Nesic ◽  
...  
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Vapor Phase ◽  
Electrical Resistance ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Electrical Resistance Measurements ◽  
Scanning Electron

This paper presents a comprehensive method to evaluate the mixture of dicyclohexilamine and oleylamine (DCHA+OA) as corrosion inhibitor for mild steel in CO2 environment in liquid and vapor phase. Corrosion inhibitor volatile properties were investigated in order to determine if DCHA+OA can be used to control the severity of the top of the line (TLC) corrosion attack. Corrosion measurements were performed using electrochemical impedance spectroscopy, linear polarization resistance, potentiodynamic sweep measurements, as well as the electrical resistance measurements and weight loss measurements, in order to determine the inhibitive performances of dicyclohexilamine and oleylamine. In order to define surface morphological characteristics scanning electron microscopy technique was applied. The electrochemical study and weight loss measurements indicated that DCHA+OA significantly decreased the corrosion rate in liquid phase when 50 ppm of DCHA+OA was added. Scanning electron microphotographs indicated protective inhibitor film has formed on the steel surface and revealed that good protection was achieved, along with the decrease in the corrosion rate determined by weight loss and electrochemical techniques. Using electrical resistance measurements in vapor phase it was shown that concentration of 1000 ppm DCHA+OA significantly decreased the corrosion rate at the top of the line, only when it was carried there within its own foam and not due its volatility.

Rhus verniciflua as a green corrosion inhibitor for mild steel in 1 M H2SO4

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57144-57153 ◽  
Author(s):  
Mayakrishnan Prabakaran ◽  
Seung-Hyun Kim ◽  
Venkatesan Hemapriya ◽  
Mayakrishnan Gopiraman ◽  
Ick Soo Kim ◽  
...  
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Methanolic Extract ◽  
Electrochemical Impedance ◽  
Green Corrosion Inhibitor ◽  
Rhus Verniciflua ◽  
Ft Ir ◽  
Uv Visible

The methanolic extract of the plant Rhus verniciflua was examined as a corrosion inhibitor for mild steel in 1 M H2SO4 through weight loss, UV-visible, FT-IR, electrochemical impedance spectroscopy, and potentiodynamic polarization measurements.

scholarly journals Corrosion Inhibitive Properties of 5-(4-Aminophenyl)-1,3,4-oxadiazole-2-thiol and 5-(4-Methylphenyl)-1,3,4-oxadiazole-2-thiol on Mild Steel in 1.0 M HCl Solution

2021 ◽  
Vol 33 (12) ◽  
pp. 2953-2964
Author(s):  
Vikas Kalia ◽  
Pradeep Kumar ◽  
Suresh Kumar ◽  
Hariom Dahiya
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Electrochemical Impedance ◽  
Charge Transfer Resistance ◽  
Polarization Measurement ◽  
Weight Loss Measurement ◽  
Transfer Resistance ◽  
Loss Measurement

The corrosion inhibition consequence of 5-(4-aminophenyl)-1,3,4-oxadiazole-2-thiol (APOT) and 5-(4-methylphenyl)-1,3,4-oxadiazole-2-thiol (MPOT) were accomplished by employing weight loss measurement, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization measurement and scanning electron microscope (SEM). An impact of immersion time 12.0 h and different temperatures (298, 308 and 318 K) with solution of 1.0 M HCl, which include various concentration of inhibitor at the corrosion of mild steel were designed. Weight loss measurement showed that with enhancing the concentration of these studied inhibitors the percentage inhibition efficiency (IE%) enhances, but corrosion rate (CR) diminishes while reverse condition in case of temperatures change. The electrochemical impedance spectroscopy examine pointed out that the charge transfer resistance (Rct) values enhances and consequently the double layer capacitance (Cdl) values diminishes with rising each inhibitor concentration in 1.0 M HCl and also there is a formation of adsorption coating at the metal surface. Polarization measurement showed that both APOT and MPOT perform as mixed type corrosion inhibitors. Furthermore, the adsorption behaviour on surface of mild steel for each studied inhibitor results the Langmuir adsorption isotherm. Surface conduct of mild steel also designed through the SEM and energy dispersive X-ray (EDX) analysis and concludes that there is evolution of inhibitive film of APOT and MPOT on the surface of mild steel.

Investigation of a New Corrosion Inhibitor Cucurbiturils for Mild Steel in 10% Acidic Medium

2016 ◽  
Vol 18 ◽  
pp. 21-38 ◽  
Author(s):  
Elyor Berdimurodov ◽  
J. Wang ◽  
Abduvali Kholikov ◽  
Khamdam Akbarov ◽  
Bakhtiyor Burikhonov ◽  
...  
Keyword(s):  
Mild Steel ◽  
Electrochemical Impedance ◽  
Theoretical Calculations ◽  
Effect Of Temperature ◽  
Electron Microscopic ◽  
Scanning Electron Microscopic ◽  
Polarization Studies ◽  
Inhibition Property ◽  
Scanning Electron ◽  
Good Agreement

The corrosion inhibition property of cucurbiturils has studied in 10% HCl for mild steel using gravimetric, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (Tafel) and scanning electron microscopy (SEM) methods. It was found that the inhibition efficiency of inhibitors increases with increase in concentration. The effect of temperature on the corrosion rate was investigated and some thermodynamic parameters were calculated. Polarization studies show that inhibitors are of mixed type in nature. The results show that they are good inhibitors, and the adsorption of inhibitors on mild steel surface obeys Langmuir adsorption isotherm. Scanning electron microscopic (SEM) studies were used to characterize the surface morphology of uninhibited and inhibited mild steel specimens. The results obtained from experimental measurements and those from theoretical calculations are in good agreement.

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