scholarly journals Inhibitory Mechanism of Carbon Steel Corrosion in Sea Water by an Aqueous Extract of Henna Leaves

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
V. Johnsirani ◽  
J. Sathiyabama ◽  
Susai Rajendran ◽  
A. Suriya Prabha
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Metal Surface ◽  
Aqueous Extract ◽  
Inhibition Efficiency ◽  
Sea Water ◽  
Steel Corrosion ◽  
Protective Film ◽  
Weight Loss Method ◽  
Ac Impedance Spectra

The inhibition efficiency (IE) of an aqueous extract of henna leaves in controlling corrosion of carbon steel in seawater has been evaluated by weight-loss method. The weight loss study reveals that the formulation consisting of 8 mL of henna extract (HE) and 25 ppm of Zn2+ has 94% inhibition efficiency in controlling corrosion of carbon steel in sea water. Polarization study reveals that HE and Zn2+ system functions as mixed type inhibitor. AC impedance spectra reveal that protective film is formed on the metal surface. The nature of the metal surface has been analysed by FTIR spectra, SEM, and AFM analysis.

scholarly journals Surface Protection of Carbon Steel by Hexanesulphonic Acid-Zinc Ion System

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
C. Mary Anbarasi ◽  
Susai Rajendran
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Metal Surface ◽  
Zinc Ion ◽  
Protective Film ◽  
Bivalent Cation ◽  
Surface Protection ◽  
Weight Loss Method ◽  
Loss Method ◽  
Ac Impedance Spectra

Inhibition of corrosion of carbon steel in dam water by hexanesulphonic acid as its sodium salt C6H13SO3Na (SHXS) in the absence and presence of a bivalent cation zinc ion (Zn2þ) has been investigated using weight loss method. Results of weight loss method indicate that inhibition efficiency (IE) increased with increase of inhibitor concentration. Polarization study reveals that SHXS-Zn2+ system controls the cathodic reaction predominantly. AC impedance spectra reveal that a protective film is formed on the metal surface. The nature of the metal surface has been analysed by Fourier Transform Infrared Spectroscopy (FTIR) and Atomic Force Microscopy (AFM).

scholarly journals Inhibition of corrosion of SS 18/8 alloy is sea water by Thiourea-Zn2+ system

2021 ◽  
Vol 62 (3) ◽  
pp. 191-203
Author(s):  
Josephath Praveena ◽  
Somasundaram Gowri ◽  
Gunasekaran Nethravathi ◽  
Vincent Varsha ◽  
Arockiasamy Vieyana ◽  
...  
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Metal Surface ◽  
Sea Water ◽  
Ac Impedance ◽  
Protective Film ◽  
Impedance Spectra ◽  
Weight Loss Method ◽  
Loss Method ◽  
Ac Impedance Spectra

The corrosion resistance of SS 18/8 in natural sea water, in presence of an inhibitor named Thiourea-Zn2+ has been evaluated. Weight loss method, polarization study and AC impedance spectra have been employed to evaluate the corrosion resistance of SS 18/8 alloy in natural sea water, in presence of an inhibitor named Thiourea-Zn2+ system. Weight loss method reveals that Thiourea-Zn2+ system offers a maximum corrosion inhibition efficiency of 95% in controlling corrosion of SS 18/8 alloy in natural sea water. Synergism parameters are found to be greater than 1, confirming the synergistic effect existing between Thiourea-Zn2+. Adsorption of inhibitor molecules on the metal surface obey Langmuir adsorption isotherm. Polarisation study reveals that the inhibitors named Thiourea-Zn2+ system functions as mixed type of inhibitor. AC impedance spectra confirm the formation of a protective film on the metal surface. This formulation of Thiourea-Zn2+ may be used in cooling water systems where SS 18/8 alloy pipelines are used to carry sea water which is used as coolant. Also, Thiourea-Zn2+ coating can be given on SS 18/8 alloy to protect it from corrosion by sea water when SS 18/8 alloy is used as hull plates in ship industry.

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.

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 Study of Kinetics and Inhibition Efficiency by Isoquinoline-5-Carboxaldehyde for Carbon Steel Corrosion in HCl

2020 ◽  
Vol 55 (3) ◽  
Author(s):  
Raheem A.H. Al-Uqaily ◽  
Subhi A. Al-Bayaty ◽  
Sattar O. Maiws Al-Mayyahi
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Metal Surface ◽  
Inhibition Efficiency ◽  
Adsorption Process ◽  
Steel Corrosion ◽  
Hydrogen Gas ◽  
Gas Evolution ◽  
Film Layer

In this paper, a study of kinetics and inhibition efficiency by isoquinoline-5-carboxaldehyde of carbon steel corrosion in hydrochloric acid is conducted. The method of weight loss and hydrogen gas evolution was used with various inhibitor concentrations ranging from 150-450 parts per million with several temperatures from 40-60°C. Our results showed that increasing inhibitor concentrations and temperature led to an increase in the inhibition efficiency; this indicates both the adsorption of a film layer on a metal surface and the efficacy of the inhibitor by the attendance of oxygen and nitrogen atoms that have an active part in the adsorption process. In this study entropy, activation, and enthalpy energy were calculated.

scholarly journals Inhibition of corrosion of mild steel by an alcoholic extract of a seaweed Sargassum muticum

2021 ◽  
Vol 62 (4) ◽  
pp. 304-315
Author(s):  
Mallika Arockiaraj ◽  
Suyambulingam Kirubavathy ◽  
Abdulhameed Al-Hashem ◽  
Rajendran Santhammal ◽  
R.M. Joany ◽  
...  
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Metal Surface ◽  
Sargassum Muticum ◽  
Alcoholic Extract ◽  
Protective Film ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Loss Method ◽  
Ac Impedance Spectra

An alcoholic extract of a sea weed Sargassum muticum has been used to control corrosion of mild steel in 0.5 N HCl. Weight loss method and Electrochemical studies have been used in this study. Weight loss study reveals that 500 ppm of the inhibitor offers 99.25 % inhibition efficiency. Polarization study reveals that the inhibitor functions as an anodic inhibitor at higher concentration. The AC impedance spectra confirm the formation of a protective film on the metal surface. Adsorption of inhibitor molecules on the metal surface follows Langmuir adsorption isotherm.

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 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 New Aromatic Azo-Schiff as Carbon Steel Corrosion Inhibitor in 1 M H2SO4

2018 ◽  
Vol 34 (5) ◽  
pp. 2471-2476 ◽  
Author(s):  
Hamida Edan Salman ◽  
Asim A. Balakit ◽  
Ali Ahmed Abdulridha
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Steel Corrosion ◽  
Spectroscopic Techniques ◽  
Different Temperatures ◽  
Corrosion Inhibition Efficiency

A new aromatic Schiff base with azo linkage (AS) has been synthesized and characterized by FT-IR, 1H NMR and 13C NMR spectroscopic techniques. The new compound (AS) has been evaluated as carbon steel corrosion inhibitor at different concentrations (0.005, 0.01, 0.02, 0.04 and 0.08 mM) and different temperatures (303 – 333 K). The corrosion inhibition efficiency was studied by potentiodynamic polarization and weight loss measurements. The effects of concentration and temperature on the inhibition efficiency were studied by potentiodynamic polarization studies, the results showed that increasing concentration of AS increases the inhibition efficiency while increasing the temperature decreases it, the highest corrosion inhibition efficiency, 93.9% was recorded with 0.08 mM of AS at 313 K in 1 M H2SO4. Weight loss measurements showed that the inhibition efficiency reached 97.1% in the presence of AS (0.08 mM) at 313 K. The adsorption process was found to obey Langmuir isotherm, and the adsorption thermodynamic parameters were studied. Scanning electron microscope (SEM) was used to confirm the results.

Study of N-1L Corrosion of Carbon Steel in Acidic Desulfurizer Performance

2014 ◽  
Vol 670-671 ◽  
pp. 37-40 ◽  
Author(s):  
Shi Dong Wang ◽  
Qiang Wang ◽  
Jing Li ◽  
Shu Liang Zang
Keyword(s):  
Weight Loss ◽  
Ionic Liquid ◽  
Polyethylene Glycol ◽  
Carbon Steel ◽  
Steel Corrosion ◽  
Inhibition Rate ◽  
Inhibition Effect ◽  
Steel Material ◽  
Weight Loss Method ◽  
Loss Method

This paper uses a metal hung weight loss method, acidic ionic liquid desulfurizer as the media, by adding different inhibitor (Polyethylene Glycol, SDBS, Functional ionic liquids), contrast to carbon steel corrosion in the absence of inhibitor, understanding of their respective inhibition effect. In the experiment, the carbon steel material, different kinds and concentrations of the inhibitor in the medium, the corrosion rate measured by weight loss method. Contrast to the blank experiment the inhibition rate can be calculated. The experiment proved that the inhibition effect of several inhibitor at room temperature, and calculate their respective optimal concentration. The experiment also investigated the compound of several corrosion inhibition synergies, confirm the good corrosion inhibiting effect of polyethylene Glycol and SDBS complex, the inhibition rate reached 69.2%.Excellent inhibition effect of the ionic liquid corrosion inhibitor and the inhibition rate reached 88.3%, showing a clear advantage.

Sign in / Sign up

Export Citation Format

Share Document