Investigation of 4-Methoxysalicylaldehyde Thiosemicarbazone as Inhibitor for Carbon Steel in Sulfuric Acid Solution

2014 ◽  
Vol 633-634 ◽  
pp. 513-516
Author(s):  
Hong Hong Zhang ◽  
Yan Zhang ◽  
Zhong Nian Yang
Keyword(s):  
Weight Loss ◽  
Schiff Base ◽  
Carbon Steel ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
Langmuir Adsorption Isotherm ◽  
Inhibition Effect ◽  
Langmuir Adsorption ◽  
Carbon Steel Surface ◽  
Eis Measurements

The Schiff base 4-methoxysalicylaldehyde thiosemicarbazone (MST) was synthesized and its corrosion inhibition effect on carbon steel in 0.5 M H2SO4 solution was tested via weight loss and electrochemical impedance spectroscopy (EIS) measurements. The results show that MST serves as an effective corrosion inhibitor for carbon steel. The corrosion rate of carbon steel decreases with the increase in concentration of MST. The adsorption of MST on the carbon steel surface conforms to the Langmuir adsorption isotherm.

scholarly journals Some Thiophene Derivatives as Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
A. S. Fouda ◽  
A. A. Attia ◽  
A. A. Negm
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Potentiodynamic Polarization ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Effect Of Temperature ◽  
Carbon Steel Surface ◽  
Weight Loss Method ◽  
Thiophene Derivatives

Corrosion inhibitive performance of some thiophene derivatives during the acidic corrosion of carbon steel surface in 1 M HCl was investigated by chemical technique (weight loss) and electrochemical techniques (potentiodynamic polarization, electrochemical frequency modulation, and electrochemical impedance spectroscopy). The effect of temperature on the corrosion rate was investigated by the weight loss method, and some thermodynamic parameters for corrosion and adsorption processes were determined and discussed. The results show that the inhibition efficiency increased with the increase in inhibitor concentration and temperature. The adsorption of thiophene derivatives on the carbon steel surface obeys Langmuir adsorption isotherm. The obtained results indicated that the investigated compounds are chemically adsorbed on the steel surface. Potentiodynamic polarization studies showed that these compounds are mixed-type inhibitors and the results obtained from the techniques are in good agreement.

Inhibition of [NH2Et2][(4-MeC6H4O)2PS2] for Carbon Steel in Hydrochloric Acid Solution

2011 ◽  
Vol 239-242 ◽  
pp. 716-719
Author(s):  
Zhen Xiang ◽  
Xue Yang ◽  
Bin Xie ◽  
Li Ke Zou ◽  
Yang Guang Xiang ◽  
...  
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Mixed Type ◽  
Steel Surface ◽  
Standard Free Energy ◽  
Free Energy Of Adsorption ◽  
Inhibition Effect ◽  
Carbon Steel Surface ◽  
Hcl Solution ◽  
Mixed Type Inhibitor

The inhibition effect of N,N-diethylammonium O,O'-di(4-Methylpheny)dithiophosphate (NOPP, [NH2Et2][(4-MeC6H4O)2PS2])against the corrosion of carbon steel in HCl solution was studied by weight loss measurements, electrochemical measurements, AFM and SEM techniques. The studies of weight loss measurements indicate that the NOPP acts as a good inhibitor for the corrosion of carbon steel in HCl solution. Polarization curves indicate NOPP is a mixed-type inhibitor. The adsorption of NOPP on carbon steel surface obeys the Langmuir isotherm, and the obtained standard free energy of adsorption suggests that the chemisorption takes place spontaneously.

scholarly journals Surface Protection of Steel by Adsorption of Milletia Pinnata Extract

2016 ◽  
Vol 13 (2) ◽  
pp. 101-105
Author(s):  
Monikandon Sukumaran ◽  
Kesavan Devarayan
Keyword(s):  
Weight Loss ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Physical Adsorption ◽  
Ethanolic Extract ◽  
Steel Corrosion ◽  
Langmuir Adsorption Isotherm ◽  
Surface Protection ◽  
Langmuir Adsorption ◽  
Thermochemical Parameters

Steel corrosion inhibition in acidic and alkaline medium by ethanolic extract of Milletia pinnata is described in this study. The inhibitive behavior of the inhibitor is evaluated by weight loss measurements, adsorption isotherms, and thermochemical parameters. The inhibitor exhibited a maximum of 87% and 90.5% inhibition efficiency against steel corrosion in 0.5 M NaOH and 1.0 M H2SO4, respectively. The weight loss linearly fit to Langmuir adsorption isotherm with correlation coefficient value close to unity. The thermochemical parameters indicated for predominant physical adsorption of the inhibitor molecules on the steel surface.

scholarly journals Experimental and Theoretical Studies of Eosin Y Dye as Corrosion Inhibitors for Carbon Steel in Perchloric Acid Solution

2020 ◽  
Vol 15 (2) ◽  
pp. 454-464
Author(s):  
Tarik Attar ◽  
Abbes Benchadli ◽  
Boulanouar Messaoudi ◽  
Naceur Benhadria ◽  
Esma Choukchou-Braham
Keyword(s):  
Weight Loss ◽  
Free Energy ◽  
Carbon Steel ◽  
Acid Solution ◽  
Perchloric Acid ◽  
Density Functional ◽  
Steel Surface ◽  
Eosin Y ◽  
Perchloric Acid Solution ◽  
Carbon Steel Surface

The adsorption behavior and the inhibition performance of Eosin Y Dye for carbon steel corrosion in 1 M perchloric acid solution have been carried using weight loss and scanning electron micrograph (SEM) techniques as well theoretical calculations based on density functional theory (DFT). The studied inhibitor concentrations were between 5´10-5 M and 5´10-3 M. Results obtained revealed that Eosin Y is an effective inhibitor and its inhibition efficiency increases with increasing concentration to attain 96.91% at 5´10-3 M at 30 °C. Thermodynamic parameters such as adsorption heat, adsorption entropy and adsorption free energy were obtained from experimental data of the temperature studies of the inhibition process at five temperatures ranging from 20 to 60 °C. It was found that the adsorption of Eosin Y could prevent steel from weight loss and the adsorption accorded with the Langmuir adsorption isotherm. The free energy of adsorption showed that the corrosion inhibition takes place by spontaneous physicochemical adsorption of inhibitor molecules on the carbon steel surface. SEM and DFT studies confirm the adsorption of Eosin Y on carbon steel surface. Copyright © 2020 BCREC Group. All rights reserved 

scholarly journals Antibacterial Inhibitor as an Expired Metoclopramide in 0.5M Phosphoric Acid

2019 ◽  
Vol 15 (1) ◽  
pp. 71-81 ◽  
Author(s):  
Rana Afif Anaee ◽  
Majed Hameed Abd Al-Majeed ◽  
Shaimaa Alaa Naser ◽  
Mustafa M. Kathem ◽  
Omer Akram Ahmed
Keyword(s):  
Carbon Steel ◽  
Langmuir Adsorption Isotherm ◽  
Efficient Inhibitor ◽  
X Ray ◽  
Langmuir Adsorption ◽  
Carbon Steel Surface ◽  
Adsorption Desorption ◽  
Expired Drug ◽  
Mixed Type Inhibitor

Expired drug Metoclopramide was investigated as an antibacterial corrosion inhibitor for carbon steel in 0.5M H3PO4 solution using the electrochemical method at 30oC and 60oC. The results showed that this drug is an efficient inhibitor for carbon steel and the efficiency reached to 82.244 % for 175 ppm at 30oC and 76.146% for 225 ppm at 60oC. The adsorption of drug on carbon steel surface follows Langmuir adsorption isotherm with small values of adsorption-desorption constant. The polarization plots revealed that Metoclopramide acts as mixed-type inhibitor. Some parameters of inhibition process were calculated and discussed. The surface morphology of the carbon steel specimens was analyzed using scanning electron microscope and energy dispersive X-ray analysis. Antibacterial activity of inhibitor was also tested. Fourier-transform infrared (FTIR) spectroscopy confirmed the inhibitive role of Metoclopramide drug.

scholarly journals Corrosion Inhibition of Zinc Using Some Phenylthiazole Derivatives in Hydrochloric acid Solutions

2008 ◽  
Vol 4 (2) ◽  
pp. 425-440
Author(s):  
Abdel Aziz Fouda ◽  
A. Abdel Nazeerb ◽  
K.M.Abdel Khalek
Keyword(s):  
Weight Loss ◽  
Mixed Type ◽  
Electrochemical Impedance ◽  
Langmuir Adsorption Isotherm ◽  
Acid Solutions ◽  
Langmuir Adsorption ◽  
Hydrochloric Acid Solutions ◽  
Zinc Corrosion ◽  
Temperature Polarization ◽  
Inhibitive Action

The inhibitive action of some phenylthiazole derivatives namely: 2-acetylamino-5-p-bromophenylazo-4-phenylthiazole (BPT), 2-acetylamino-5-p-methylphenylazo-4-phenylthiazole (MPT), 2-acetylamino-5-p-methoxyphenylazo-4-phenylthiazole (XPT) and 2-acetylamino-5-p-nitrophenylazo-4-phenylthiazole (NPT), on zinc corrosion in 0.2 M HCl  has been studied using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS)and electrochemical frequency modulation (EFM) measurements. The results showed that the dissolution rate of zinc decreases with increasing the phenylthiazole derivatives concentration and decreases with raising temperature. Polarization curves indicated that the studied inhibitors act as mixed-type inhibitors. The adsorption of the investigated compounds follows Langmuir adsorption isotherm model. The thermodynamic parameters of adsorption and corrosion processes were determined and discussed. 

scholarly journals Corrosion inhibition, surface adsorption and computational studies of Momordica charantia extract: a sustainable and green approach

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Rajesh Haldhar ◽  
Dwarika Prasad ◽  
Divya Kamboj ◽  
Savas Kaya ◽  
Omar Dagdag ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
Spectroscopic Technique ◽  
Momordica Charantia ◽  
Green Approach ◽  
Carbon Steel Surface ◽  
Weight Loss Method ◽  
Loss Method ◽  
Inhibitory Molecules

AbstractThe aerial parts extract of Momordica charantia plant were used for the corrosion resistance of carbon steel in the acidic medium (0.5 M H2SO4) utilizing weight loss method, Tafel and Electrochemical Impedance Spectroscopy. The state of mixed inhibitor adsorption on the carbon steel surface is shown by potentiodynamic polarization. M. charantia achieved the extraordinary inhibition efficiency of 93.51% at 500 mg/L of inhibitor concentration. Scanning electron microscopy and atomic force microscopy were used to know about the thin layer which was formed on the surface of carbon steel for its protection from corrosion and the adsorption of inhibitor was shown by UV–vis. spectroscopic technique. Fourier Transform Infrared Spectroscopy technique confirmed the existence of functional groups and the heteroatoms exhibit in the inhibitor. Adsorbance by the inhibitory molecules on the carbon steel surface followed the Langmuir adsorption isotherm. Hypothetical investigations (computational) showed a very valuable report. All acquired outcomes ensure that M. charantia extract can procedure an effectual preventing layer and restrict the corrosion procedure.

scholarly journals The Inhibitive Effect of 2-Phenyl-3-nitroso-imidazo [1, 2-a]pyridine on the Corrosion of Steel in 0.5 M HCl Acid Solution

2010 ◽  
Vol 7 (s1) ◽  
pp. S35-S42 ◽  
Author(s):  
K. Bouhrira ◽  
F. Ouahiba ◽  
D. Zerouali ◽  
B. Hammouti ◽  
M. Zertoubi ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Carbon Steel Surface ◽  
Langmuir Isotherm Model ◽  
Corrosion Of Steel ◽  
Good Agreement

The effect of 2-phenyl-3-nitroso-imidazo[1,2-a]pyridine (PNIP) on the corrosion inhibition of carbon-steel in 0.5 M HCl was studied by weight loss and different electrochemical techniques such as electrochemical impedance spectroscopy (EIS), potentiodynamic polarization. The obtained results showed that PNIP effectively reduces the corrosion rate of carbon steel. Inhibition efficiency (E%) increases with inhibitor concentration to attain 88% at 10-3M. Adsorption of that PNIP on the carbon steel surface in 0.5 M HCl follows the Langmuir isotherm model. E% values obtained from various methods used are in good agreement. SEM characterization of the steel surface is made.

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