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 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 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 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.

Synergistic Inhibition Effect of Sodium Silicte and Phytic Acid for Carbon Steel in Neutral Salt Water

2011 ◽  
Vol 194-196 ◽  
pp. 134-138 ◽  
Author(s):  
Hong Yun Ma ◽  
Shou Zhi Yi ◽  
Qin Zhang
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Phytic Acid ◽  
Sodium Silicate ◽  
Inhibition Efficiency ◽  
Neutral Salt ◽  
Inhibition Effect ◽  
Tafel Polarization ◽  
Weight Loss Method ◽  
Loss Method

The inhibition effects of sodium silicate, phytic acid and their mixtures in 5% NaCl solutions have been investigated using weight loss method and Tafel polarization techniques. The surface morphology of carbon steel was obtained using scanning electron microscopy (SEM). The results show that the co-addition of 70 mg∙1-1sodium silicate and 5 g∙1-1phytic acid has the optimum inhibition efficiency (84.15%) and the lowest corrosion rate (0.13 g∙m-2∙h-1). Compared with their individual inhibition effects, the optimum inhibition efficiency of sodium silicate is 62.17% at 90 mg∙1-1and phytic acid is 80.05% at 15 g∙1-1, respectively. The results obtained from weight loss method and Tafel polarization curves are in good agreement. The results show the enhanced inhibition effect by the inhibitors mixtures.

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 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.

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 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 Microbial Corrosion of API 5L X-70 Carbon Steel by ATCC 7757 and Consortium of Sulfate-Reducing Bacteria

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Arman Abdullah ◽  
Nordin Yahaya ◽  
Norhazilan Md Noor ◽  
Rosilawati Mohd Rasol
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Sulfate Reducing Bacteria ◽  
Desulfovibrio Vulgaris ◽  
Corrosion Morphology ◽  
Sulfate Reducing ◽  
Weight Loss Method ◽  
Loss Method ◽  
Reducing Bacteria

Various cases of accidents involving microbiology influenced corrosion (MIC) were reported by the oil and gas industry. Sulfate reducing bacteria (SRB) have always been linked to MIC mechanisms as one of the major causes of localized corrosion problems. In this study, SRB colonies were isolated from the soil in suspected areas near the natural gas transmission pipeline in Malaysia. The effects of ATCC 7757 and consortium of isolated SRB upon corrosion on API 5L X-70 carbon steel coupon were investigated using a weight loss method, an open circuit potential method (OCP), and a potentiodynamic polarization curves method in anaerobic conditions. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were then used to determine the corrosion morphology in verifying the SRB activity and corrosion products formation. Results from the study show that the corrosion rate (CR) of weight loss method for the isolated SRB is recorded as 0.2017 mm/yr compared to 0.2530 mm/yr for ATCC 7757. The Tafel plot recorded the corrosion rate of 0.3290 mm/yr for Sg. Ular SRB and 0.2500 mm/yr forDesulfovibrio vulgaris. The results showed that the consortia of isolated SRB were of comparable effects and features with the single ATCC 7757 strain.

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