scholarly journals Allium Sativum (Garlic) Extract as Nontoxic Corrosion Inhibitor

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
K. Rajam ◽  
S. Rajendran ◽  
R. Saranya
Keyword(s):  
Carbon Steel ◽  
Mass Loss ◽  
Allium Sativum ◽  
Inhibition Efficiency ◽  
Garlic Extract ◽  
Well Water ◽  
Protective Film ◽  
Anodic Reaction ◽  
Polarization Study ◽  
Loss Method

The inhibition efficiency (IE) of an aqueous extract of garlic in controlling corrosion of carbon steel in well water in the absence and presence ofZn2+has been evaluated by mass-loss method. The formulation consisting of 2 mL of garlic extract and 25 ppmZn2+offers 70% inhibition efficiency to carbon steel immersed in well water. Polarization study reveals that this formulation controls the anodic reaction predominantly. FTIR spectra reveal that the protective film consists ofFe2+-allicin complex and Zn(OH)2.

Inhibition of Corrosion of Carbon Steel by Resorcinol-Zn2+ System in Well Water

2015 ◽  
Vol 1 (2) ◽  
Author(s):  
Benita Sherine ◽  
A. Jamal Abdul Nasser ◽  
S. Rajendran
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Inhibition Efficiency ◽  
Well Water ◽  
Protective Film ◽  
Zinc Ions ◽  
Immersion Period ◽  
Afm Analysis ◽  
Weight Loss Method ◽  
Loss Method

The inhibition efficiencies of inhibitor systems constituting various combinations of resorcinol and zinc ions in controlling corrosion of carbon steel immersed in well water have been evaluated by weight loss method. 75 ppm of zinc has 36% inhibition efficiency (Immersion period =7 days). When 100 ppm of resorcinol is added, the IE increases to 96%. The nature of the protective film formed on the metal surface has been analyzed by FTIR spectra, SEM and AFM analysis. The protective film is found to consist of Fe2+ - resorcinol complex and Zn(OH)2.

scholarly journals Effect of Caffeine-Zn2+System in Preventing Corrosion of Carbon Steel in Well Water

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
K. Rajam ◽  
S. Rajendran ◽  
N. Nazeera Banu
Keyword(s):  
Carbon Steel ◽  
Malic Acid ◽  
Inhibition Efficiency ◽  
Well Water ◽  
Protective Film ◽  
Impedance Spectra ◽  
Water Addition ◽  
Immersion Period ◽  
Loss Method ◽  
Ac Impedance Spectra

The inhibition efficiency (IE) of caffeine in controlling corrosion of carbon steel in well water in the absence and presence of Zn2+has been evaluated by mass loss method. The formulation, consisting of 200 ppm of caffeine and 50 ppm Zn2+, offers 82% inhibition efficiency to carbon steel immersed in well water. Addition of malic acid increases inhibition efficiency of the caffeine-Zn2+system. The inhibition efficiency of caffeine-Zn2+and caffeine-Zn2+-malic acid system decreases with the increase in immersion period and increases with the increase in pH from 3 to 11. AC impedance spectra, SEM micrographs, and AFM studies reveal the formation of protective film on the metal surface. The film is found to be UV fluorescent.

scholarly journals Corrosion Inhibition Effect of Carbon Steel in Sea Water by L-Arginine-Zn2+System

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
S. Gowri ◽  
J. Sathiyabama ◽  
S. Rajendran
Keyword(s):  
Carbon Steel ◽  
Metal Surface ◽  
Sea Water ◽  
Protective Film ◽  
Anodic Reaction ◽  
Polarization Study ◽  
Afm Analysis ◽  
Weight Loss Method ◽  
Loss Method ◽  
Ac Impedance Spectra

The inhibition efficiency of L-Arginine-Zn2+system in controlling corrosion of carbon steel in sea water has been evaluated by the weight-loss method. The formulation consisting of 250 ppm of L-Arginine and 25 ppm of Zn2+has 91% IE. A synergistic effect exists between L-Arginine and Zn2+. Polarization study reveals that the L-Arginine-Zn2+system functions as an anodic inhibitor and the formulation controls the anodic reaction predominantly. AC impedance spectra reveal that protective film is formed on the metal surface. Cyclic voltammetry study reveals that the protective film is more compact and stable even in a 3.5% NaCl environment. The nature of the protective film on a metal surface has been analyzed by FTIR, SEM, and AFM analysis.

scholarly journals Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+System

2012 ◽  
Vol 9 (4) ◽  
pp. 1746-1752 ◽  
Author(s):  
J. Wilson Sahayaraj ◽  
A. John Amalraj ◽  
Susai Rajendran ◽  
N. Vijaya
Keyword(s):  
Aqueous Solution ◽  
Weight Loss ◽  
Inhibition Efficiency ◽  
Sodium Molybdate ◽  
Antagonistic Effect ◽  
Protective Film ◽  
Antagonistic Effects ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Loss Method

The inhibition efficiency (IE) of sodium molybdate (SM) in controlling corrosion of carbon steel in an aqueous solution containing 120 ppm of Cl-, in the absence and presence of Zn2+has been evaluated by weight-loss method. A synergistic effect exists between SM and Zn2+when the concentration of Zn2+is 25 ppm and above. Inhibition efficiencies obtained are greater than 85%. Antagonistic effect exists between SM and Zn2+when the concentration of Zn2+is 10 ppm and below. The SM-Zn2+system shows excellent IE up to third day. Above third day IE decreases. Acceleration of corrosion takes place. Excellent IE is shown at pH 5,7 and 12. At pH 9, IE decreases since Zn2+is precipitated as Zn(OH)2in the bulk of the solution. Polarization study reveals that SM-Zn2+system functions as a mixed inhibitor. FTIR spectra reveal that the protective film consists of Fe2+-SM complex and Zn(OH)2.

scholarly journals Corrosion Inhibition by Sodium Gluconate-Zn2+-DTPMP System

2009 ◽  
Vol 6 (3) ◽  
pp. 887-897 ◽  
Author(s):  
P. Manjula
Keyword(s):  
Phosphonic Acid ◽  
Inhibition Efficiency ◽  
Impedance Spectrum ◽  
Protective Film ◽  
Sodium Gluconate ◽  
Diethylene Triamine ◽  
Atomic Force ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Loss Method

The inhibition efficiency of a phosphonic acid, Diethylene Triamine Pentamethylene Phosphonic acid (DTPMP) in controlling corrosion of carbon steel immersed in an aqueous solution containing 60 ppm of Cl-has been evaluated by weight loss method in the absence and presence of Zn2+. The formulation consisting of DTPMP and Zn2+has excellent inhibition efficiency (IE). A synergistic effect is noticed between Zn2+and DTPMP. Addition of sodium gluconate (SG) enhances the IE of Zn2+and DTPMP system. The DTPMP-Zn2+-SG system function as a mixed inhibitor as revealed by polarization study. AC impedance spectrum, optical and atomic force micrographs reveal the formation of a protective film on the metal surface. FTIR spectra reveal that the protective film consists of Fe2+-DTPMP complex, Fe2+-SG complex and Zn(OH)2.

scholarly journals Inhibition of corrosion of mild steel in well water by an aqueous extract of soapnut (Sapindus Trifoliatus)

2021 ◽  
Vol 62 (4) ◽  
pp. 277-290
Author(s):  
Josephath Praveena ◽  
Jeyaraj Clara ◽  
Susai Rajendran ◽  
Antony Amalraj
Keyword(s):  
Mild Steel ◽  
Metal Surface ◽  
Inhibition Efficiency ◽  
Well Water ◽  
Impedance Spectra ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Inhibitor System ◽  
Loss Method ◽  
Ac Impedance Spectra

Inhibition efficiency of an aqueous extract of soapnut (Sapindus Trifoliatus) and Zn2+in controlling corrosion of mild steel in well water at room temperature has been evaluated by using weight loss method, polarization study and AC impedance spectra. Dynamic light scattering and Vickers hardness have also been employed. Weight loss method reveals that the formulation consisting of 10 ml soapnut extract and 50 ppm Zn2+ has 97 % inhibition efficiency in controlling corrosion of mild steel immersed in well water. Synergism parameters suggest that a synergistic effect exists between soapnut extract and Zn2+. Adsorption isotherm of metal surface obeys Langmuir adsorption isotherm. Polarization study reveals that the inhibitor system functions as anodic type of inhibitor. AC impedance spectra confirm the protective film formed on the metal surface. Dynamic light scattering (DLS) study reveals surface is in nano meter scale. The Vickers hardness of metal surface was increases in inhibitor system.

scholarly journals Corrosion Inhibition of Carbon Steel using Dipropyl Sulphide as Inhibitor System in Sulphuric Acid Solution

2021 ◽  
Vol 33 (12) ◽  
pp. 3115-3122
Author(s):  
P. Vijayakumar ◽  
S. Valarselvan ◽  
S.S. Syed Abuthahir
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Sulphuric Acid ◽  
Surface Analysis ◽  
Corrosion Inhibition ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Protective Film ◽  
Carbon Steel Surface ◽  
Loss Method

The corrosion inhibition effect of dipropyl sulphide (DPS) on carbon steel immersed in 0.5 N sulphuric acid has been evaluated at room temperature using mass loss method. The corrosion rate and inhibition efficiency was obtained from weight loss method. The corrosion inhibition efficiency increases with increase in concentration of an inhibitor. The corrosion rate decreases when increase in concentration of inhibitor. This is due to the higher concentration of inhibitor solution, which blocks the active site of a carbon steel and a protective film is formed on the carbon steel surface. Electrochemical studies have been used to confirm the formation of protective film over the carbon steel surface. This is further confirmed by surface analysis technique like FTIR spectroscopy and scanning electron microscopy. Energy dispersive analysis of X-ray was used to analyze the elements present over the carbon steel surface. Surface analysis of polished, corroded and inhibitor carbon steel surface has been evaluated by SEM. In order to study adsorption of dipropyl sulphide on carbon steel, in situ atomic force microscopy (AFM) measurements were performed in control, with and without dipropyl sulphide in 0.5 N H2SO4 solution.

scholarly journals Inhibition of Corrosion of Carbon Steel in Well Water by DL-Phenylalanine-Zn2+System

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
A. Sahaya Raja ◽  
S. Rajendran ◽  
P. Satyabama
Keyword(s):  
Weight Loss ◽  
Inhibition Efficiency ◽  
Protective Film ◽  
Impedance Spectra ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Inhibitor System ◽  
Loss Method ◽  
Ac Impedance Spectra ◽  
Weight Loss Study

The environmental friendly inhibitor system DL-phenylalanine-Zn2+has been investigated by weight loss method. A synergistic effect exists between DL-phenylalanine and Zn2+system. The formulation consisting of 150 ppm of DL-phenylalanine and 5 ppm of Zn2+offers good inhibition efficiency of 90%. Polarization study reveals that this formulation functions as a anodic inhibitor. AC impedance spectra reveal that a protective film is formed on the metal surface. The surface morphology has been analysed by SEM and EDAX. A suitable mechanism of corrosion inhibition is proposed based on the results obtained from weight loss study and electrochemical studies.

scholarly journals Deterioration resistance Behavior of Carbon Metal in Salt Water by Alanine- Zn2+ System

2020 ◽  
pp. 172-179
Keyword(s):  
Carbon Steel ◽  
Synergistic Effect ◽  
Mass Loss ◽  
Salt Water ◽  
System Function ◽  
Polarization Analysis ◽  
Metal Shell ◽  
Anodic Reaction ◽  
Afm Analysis ◽  
Loss Method

The inhibition effectiveness of Alanine - Zn2+ system in scheming deterioration of carbon steel in salt water has been evaluate by mass loss method. The formulation consisting of 250 ppm of Alanine and 25 ppm of Zn2+ has 87% IE. A synergistic effect exists among Alanine and Zn2+. Polarization analysis reveals to facilitate the Alanine - Zn2+ system function as an anodic inhibitor and the formulation controls the anodic reaction mostly. The character of the shielding film on metal shell has been analyzed by AFM analysis.

scholarly journals Study the corrosion inhibition of mix of caffeine and iodua for CT3 steel in 1M HCl solution by electrochemical methods

2017 ◽  
Vol 33 (3) ◽  
Author(s):  
Truong Thao
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Electrochemical Methods ◽  
Anodic Reaction ◽  
Mild Carbon Steel ◽  
Current Densities ◽  
Hcl Solution ◽  
Surface Observations

Abstract: Corrosion inhibition of mild carbon steel, CT3,  in 1.0 M HCl solution by iodide  (with different concentrations, from 0.1g/l to 5.0g/l), mix of caffeine and iodide was investigated by electrochemical methods and micro surface observations (SEM). Experiment result showed that: (1) as the concentration of iodide increases, the inhibition efficiency increases;  Iodide acts as a mix – type inhibitor but inhibits anodic reaction is predominant. (2) Mix of 1.0 g/l iodide ang caffeine acts as a typical mix – type inhibitor. the current densities of both of anodic and cathode are decline when concentration of caffeine is 1.0 g/l or more. Inhibition efficiency max is approximately 96% at concentration of 5.0 g/l caffeine, the inhibition efficiency maintained relatively stable within 5 days.  

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