Corrosion Inhibition of (2-pyridyl)-Acetyl Chitosan on the Acid Corrosion of Mild Steel

2016 ◽  
Vol 4 (1) ◽  
pp. 22-27
Author(s):  
Y. Sangeetha ◽  
S. Meenakshi ◽  
C. Sairam Sundaram
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Acid Corrosion

scholarly journals Acid Corrosion Inhibition and Adsorption Behaviour of Ethyl Hydroxyethyl Cellulose on Mild Steel Corrosion

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
I. O. Arukalam ◽  
I. O. Madu ◽  
N. T. Ijomah ◽  
C. M. Ewulonu ◽  
G. N. Onyeagoro
Keyword(s):  
Mild Steel ◽  
Molecular Orbital ◽  
Corrosion Inhibition ◽  
Density Functional ◽  
Inhibition Efficiency ◽  
Acid Corrosion ◽  
Hydroxyethyl Cellulose ◽  
Chemical Calculation ◽  
Free Energy Of Adsorption ◽  
Ethyl Hydroxyethyl Cellulose

The corrosion inhibition of mild steel in 1.0 M H2SO4 solution by ethyl hydroxyethyl cellulose has been studied in relation to the concentration of the additive using weight loss measurement, EIS, polarization, and quantum chemical calculation techniques. The results indicate that EHEC inhibited corrosion reaction in the acid medium and inhibition efficiency increased with EHEC concentration. Further increase in inhibition efficiency is observed in the presence of iodide ions, due to synergistic effect. Impedance results reveal that EHEC is adsorbed on the corroding metal surface. Adsorption followed a modified Langmuir isotherm, with very high negative values of the free energy of adsorption (ΔGads). The polarization data indicate that the inhibitor was of mixed type, with predominant effect on the cathodic partial reaction. The frontier molecular orbitals, HOMO (the highest occupied molecular orbital) and LUMO (the lowest unoccupied molecular orbital) as well as local reactivity of the EHEC molecule, were analyzed theoretically using the density functional theory to explain the adsorption characteristics at a molecular level. The theoretical predictions showed good agreement with experimental results.

scholarly journals Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel

2012 ◽  
Vol 30 (3) ◽  
pp. 189-202 ◽  
Author(s):  
C E Ogukwe ◽  
C O Akalezi ◽  
M A Chidiebere ◽  
K L Oguzie ◽  
Z O Iheabunike ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Leaf Extract ◽  
Acid Corrosion
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