scholarly journals Artichoke Extract as an Eco-Friendly Corrosion Inhibitor for Zinc in 1 M Hydrochloric Acid Solution

2021 ◽  
Vol 10 (4) ◽  
pp. 2655-2679
Keyword(s):  
Adsorption Isotherm ◽  
Corrosion Inhibitor ◽  
Inhibition Efficiency ◽  
Langmuir Adsorption Isotherm ◽  
Free Energy Of Adsorption ◽  
Adsorption Parameters ◽  
Langmuir Adsorption ◽  
Zinc Surface ◽  
Dynamics Simulations ◽  
Hcl Solution

Artichoke extract (AE) was studied as the corrosion inhibitor for zinc in 1 M HCl utilizing chemical and electrochemical methods. The adsorption isotherm of Artichoke extract on Zn surface accords with Langmuir adsorption isotherm. The inhibition efficiency increases with increasing the extract's concentration and decreases with the rise in the medium's temperature. The inhibition efficiency reached a value of 93.2% at 300 ppm of extract. This extract may be forming a film and acts as a barrier, which minimizes the contact area between zinc surface and HCl solution. Artichoke extract acts as a mixed inhibitor in HCl solution. Thermodynamic parameters of activation and adsorption were determined and explained. The adsorption parameters also obeyed the Langmuir adsorption isotherm, and the sign of the free energy of adsorption showed a spontaneous process. The surface morphology of zinc metal was examined by employing various techniques. Also, the biological effect of the Artichoke extract was studied. Theoretical studies of quantum mechanics and molecular dynamics simulations studies were carried out on the Artichoke extract compounds, and the results agree with the experimental one. The efficiencies marked from all employed techniques were in perfect correspondence, demonstrating the validity of these procedures.

scholarly journals COVID-19 Vaccine, Contraceptive, Viscosity and Safety Margin Change

2021 ◽  
Vol 11 (2) ◽  
pp. 3509-3512
Keyword(s):  
Adsorption Isotherm ◽  
Mild Steel ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Safety Margin ◽  
Steel Corrosion ◽  
Langmuir Adsorption Isotherm ◽  
Langmuir Adsorption ◽  
Mild Steel Corrosion ◽  
Hcl Solution

The temperature effect of 4-ethyl-1-(4-oxo-4-phenylbutanoyl)thiosemicarbazide (EOPT) on the mild steel corrosion in 1 M HCl solution was studied by gravimetric techniques at temperatures varying from 303 to 333 K. The investigated inhibitor concentrations were started from 100 ppm and ended with 500 ppm. The inhibition efficiency increased with the increase of the concentration of the inhibitor and reached 96.1% with the concentration of 500 ppm at 303 K and decreased to 66.3% at 333 K. Moreover, the inhibition efficiencies decreased with the temperature increase for both acids. Using the Langmuir adsorption isotherm for the adsorption of this inhibitor on the mild steel surface was determined. EOPT was found to be an efficient corrosion inhibitor due to its structural molecules, which contain sulfur, nitrogen, and oxygen, hetero atoms an addition to the aromatic ring.

scholarly journals Azadirachta indica Leaf as a Corrosion Inhibitor for Coper in Nitric Acid

2019 ◽  
Vol 70 (2) ◽  
pp. 581-584 ◽  
Author(s):  
Liviu Mitu ◽  
Sweetlin Rajula Rubavathi ◽  
Muthupoongodi Subramani ◽  
T. Linda ◽  
S. Balakumar
Keyword(s):  
Weight Loss ◽  
Nitric Acid ◽  
Adsorption Isotherm ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Plant Extract ◽  
Azadirachta Indica ◽  
Inhibition Efficiency ◽  
Langmuir Adsorption Isotherm ◽  
Langmuir Adsorption

The effect of Azadirachta indica leaf (AIL) extract on the corrosion of copper in 1M HNO3 was investigated by weight loss technique. The result showed that the corrosion rate decreased in the presence of plant extract and inhibition efficiency increased with increasing the concentration of extract. The decreased corrosion rate was due to adsorption of plant extract which was discussed on the basis of Langmuir adsorption isotherm.

scholarly journals SYNTHESIS AND EVALUATION OF ETHYL (4-(N-(THIAZOL-2-YL) SULFAMOYL) PHENYL)CARBAMATE (TSPC) AS A CORROSION INHIBITOR FOR MILD STEEL IN 0.1M HCL

2016 ◽  
Vol 11 (2) ◽  
pp. 3441-3451 ◽  
Author(s):  
A. M. El-Shamy ◽  
M. F. Shehata ◽  
Samir T. Gaballah ◽  
Eman A. Elhefny
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Room Temperature ◽  
Open Circuit Potential ◽  
Inhibition Efficiency ◽  
Electrochemical Techniques ◽  
Open Circuit ◽  
Free Energy Of Adsorption ◽  
Langmuir Adsorption ◽  
Gibb’S Free Energy

Laboratory synthesized ethyl (4-(N-(thiazol-2-yl)sulfamoyl)phenyl)carbamate (TSPC), characterized by 1H NMR spectroscopy, was evaluated as corrosion inhibitor of mild steel in 0.1M HCl using electrochemical techniques. Open circuit potential, potentiodynamic polarization and impedance spectroscopy were used to evaluate the inhibition efficiency of (TSPC) at various concentrations. The obtained electrochemical data indicated that (TSPC) acts as moderate corrosion inhibitor for mild steel in acidic media. It is found that the inhibition efficiency increases with the concentration of the inhibitor till 400ppm. The adsorption isotherm involving physisorption of (TSPC) at room temperature and the experimental data complied to the Langmuir adsorption isotherms and the negative values of the Gibb’s free energy of adsorption obtained suggested that inhibitor molecules have been spontaneously adsorbed onto the mild steel surface.

Computational Calculations, Gravimetrical, and Surface Morphological Investigations of Corrosion Inhibition Effect of Triazole Derivative on Mild Steel in HCl

2020 ◽  
Vol 17 (7) ◽  
pp. 2897-2904
Author(s):  
Shaimaa B. Al-Baghdadi ◽  
Ahmed A. Al-Amiery ◽  
Abdul A. Kadhum ◽  
Mohd Sobri Takriff
Keyword(s):  
Adsorption Isotherm ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Inhibition Efficiency ◽  
The Novel ◽  
Langmuir Adsorption ◽  
Computational Calculations ◽  
Acid Environment ◽  
Experimental Findings ◽  
High Inhibition

The inhibition efficiency of the novel synthesized corrosion inhibitor namely, 5,5’-(1,4-phenylene)bis(3-mercapto-4-methyl-1,2,4-triazole) (PBMMT) have been studied for mild steel in 1 M hydrochloric acid environment by using gravimetric techniques. PBMMT show high inhibition efficiency at 0.5 mM. The adsorption isotherm of the investigated inhibitor on the surface of mild steel obeys Langmuir adsorption isotherm. The surface morphology was tested by scanning electron microscopy (SEM) in the absence and presence of PBMMT as corrosion inhibitor. The results show that the mild steel surface in presence of PBMMT 0.5 mM was smooth and uncorroded in 1 M HCl solution. Quantum chemical calculations were quite fitted with the experimental findings.

scholarly journals Corrosion Protection of Carbon Steel in 2M HCl Using Aizoon canariense Extract

2021 ◽  
Vol 12 (1) ◽  
pp. 230-243
Keyword(s):  
Activation Energy ◽  
Carbon Steel ◽  
Adsorption Isotherm ◽  
Corrosion Rate ◽  
Surface Morphology ◽  
Inhibition Efficiency ◽  
Langmuir Adsorption Isotherm ◽  
Adsorption Effect ◽  
Inhibition Effect ◽  
Langmuir Adsorption

The corrosion inhibition effectiveness of Aizoon canariense for carbon steel (CS) in 2 M HCl (the corrosive medium) has been examined by employing chemical and electrochemical methods. The inhibition efficiency was found to improve with a rise in the environment's extract and temperature concentration. The inhibitive effect of this extract was explained on the basis of adsorption on the metal surface; the adsorption effect follows Langmuir adsorption isotherm. The percent inhibition efficiency (IE%) reached 90.23% at 45oC, and activation energy (E*a) has been determined in the presence and absence of Aizoon canariense extract. The corrosion rate was calculated and revealed that Aizoon canariense has a good inhibition effect on CS. The surface morphology of CS was examined by employing various techniques. The polarization results indicated that this extract acts as a mixed kind inhibitor. The parameters for the corrosion procedure have also been determined and discussed.

scholarly journals The Effect of Concentration and Temperature on The Activities of Polyethylene Oxide (PEO) as Iron Corrosion Inhibitor in Electrolyte Solution of NaCl 1%

2019 ◽  
Author(s):  
Nur Tsalits Fahman Mughni
Keyword(s):  
Corrosion Inhibitor ◽  
Electrolyte Solution ◽  
Polyethylene Oxide ◽  
Inhibition Efficiency ◽  
Sem Analysis ◽  
Langmuir Adsorption Isotherm ◽  
Test Method ◽  
Iron Corrosion ◽  
Langmuir Adsorption ◽  
Corrosion Rates

The study of Polyethylene Oxide (PEO) activity as a corrosion inhibitor in 1% NaCl electrolyte solution was carried out by the Wheel Test method with variations in concentration and temperature. The results showed that polyethylene oxide (PEO) had the optimum inhibitory activity at a concentration of 16 ppm, with inhibition efficiency of 80.15% at 25˚C. Polyethylene Oxide has adsorption properties which are in accordance with the Langmuir adsorption isotherm with free adsorption energy of 21.385 kJ / mol. The results of electron microscopy (SEM) analysis showed that polyethylene oxide could inhibit corrosion rates with iron surfaces that had fewer pores than without inhibitors.

scholarly journals Glutamic Acid as Corrosion Inhibitor for Aluminium in Acidic Medium

2017 ◽  
Vol 30 (3) ◽  
pp. 179
Author(s):  
Zainab W. Ahmed ◽  
Takialdin A. Himdan ◽  
Israa M. Radhi
Keyword(s):  
Glutamic Acid ◽  
Optical Microscopy ◽  
Corrosion Inhibitor ◽  
Acidic Medium ◽  
Inhibition Efficiency ◽  
Surface Characteristic ◽  
Langmuir Adsorption Isotherm ◽  
Nacl Solution ◽  
Polarization Method ◽  
Langmuir Adsorption

 Corrosion behavior of aluminium in 0.6 mol. dm-3 NaCL solution in acidic medium (      ) was investigated in the absence and presence of different concentrations of amino acid, glutamic acid, as environmentally – friendly corrosion inhibitor over temperature range (293-308)K. The investigation involved electrochemical polarization method using potentiostatic technique and optical microscopy, the inhibition efficiency increased with an increase in inhibitor concentration but decreased with increase in temperature. Results showed that the inhibition occurs through adsorption of the inhibitor molecules on the metal surface and it was found to obey Langmuir adsorption isotherm. Some thermodynamic parameters (      ) and activation energy (  )were calculated to elaborate the mechanism of corrosion inhibition. The polarization measurements indicated that glutamic acid is of mixed type. The surface characteristic of the inhibited and uninhibited metal samples were investigated by optical microscopy.

scholarly journals Fatty Amidine as Copper Corrosion Inhibitor

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Zainal Alim Mas’ud ◽  
Noviyan Darmawan ◽  
Januari Dawolo ◽  
Yusuf Bramastya Apriliyanto
Keyword(s):  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Adsorption Process ◽  
Copper Surface ◽  
Langmuir Adsorption Isotherm ◽  
Copper Corrosion ◽  
Langmuir Adsorption ◽  
New Type ◽  
Corrosion Inhibition Efficiency

The development of green and sustainable corrosion inhibitors for copper in a corrosive marine environment is highly desired. Herein, we studied the fatty acid-based amidine as the new type of renewable corrosion inhibitor. Stearamidine salt was used as a model inhibitor, and it was synthesized through stearonitrile intermediate with an excellent isolated yield of 88%. We used electrochemical (potentiodynamic polarization) and morphological (scanning electron microscopy) measurements to assess the corrosion inhibition efficiency of stearamidine in 3.0 wt.% NaCl at 300 K. We show that, in such a condition, the optimum inhibition efficiency of 96% was achieved using only 0.2 mM stearamidine. The results suggested the fatty amidine is a promising corrosion inhibitor for copper that is suitable in the saltwater ecosystem. The thermodynamic parameters of the interaction between the stearamidine and the copper surface were determined, and the result suggests that the adsorption process occurred accordingly with the Langmuir adsorption isotherm and involved both physisorption and chemisorption.

The Adsorption Behavior of Thiazole on the Surface of Carbon Steel in Heterogeneous Solution

2014 ◽  
Vol 1010-1012 ◽  
pp. 1740-1744
Author(s):  
Jun Zhe Ai
Keyword(s):  
Carbon Steel ◽  
Adsorption Isotherm ◽  
Inhibition Efficiency ◽  
Langmuir Adsorption Isotherm ◽  
Adsorption Behavior ◽  
Nacl Solution ◽  
Langmuir Adsorption ◽  
Potentiodynamic Polarization Curves ◽  
Electrochemical Parameters ◽  
Spontaneous Behavior

The adsorption behavior of thiazole inhibitior on the surface of N80 carbon steel was studied by potentiodynamic polarization curves in heterogeneous NaCl solution at pH=4. The electrochemical parameters were fitted. The result shows that thiazole inhibitor is of anodic adsorption, and the inhibition efficiency increases with the concentration increasing (4.9×10-4~1.9×10-3mol/L), but decreases with the temperature increasing (30~60°C). The thermodynamics of this adsorption was also discussed. The result is shown that the adsorption is according with Langmuir adsorption isotherm formula in acidic condition, and adsorption is a spontaneous behavior.

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