scholarly journals Synergistic Effect of Nizoral and Iodide Ions on the Corrosion Inhibition of Mild Steel in Sulphuric Acid Solution

2009 ◽  
Vol 27 (5) ◽  
pp. 539-553 ◽  
Author(s):  
I B Obot
Keyword(s):  
Synergistic Effect ◽  
Acid Solution ◽  
Mild Steel ◽  
Sulphuric Acid ◽  
Corrosion Inhibition ◽  
Sulphuric Acid Solution ◽  
Iodide Ions

scholarly journals Synergistic Effect of KI on Corrosion Inhibition of Mild Steel by Polynuclear Schiff Base in Sulphuric Acid

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
K. S. Shaju ◽  
K. Joby Thomas ◽  
Vinod P. Raphael ◽  
Aby Paul
Keyword(s):  
Schiff Base ◽  
Synergistic Effect ◽  
Mild Steel ◽  
Sulphuric Acid ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Sulphuric Acid Solution ◽  
Increase With Increase ◽  
Polarization Studies

Synergistic effect of KI on the corrosion inhibition efficiency of polynuclear Schiff base, anthracene-9(10H)-one-3-aminopropanoic acid (A9O3AP), on mild steel (MS) in 0.5 M sulphuric acid solution has been investigated using weight loss measurements, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization studies. The results show that inhibition efficiencies on MS increase with increase in concentration of the inhibitor and enhancement in inhibition efficiency was observed on addition of potassium iodide due to synergism. The adsorptions, of inhibitor and inhibitor + KI on the surfaces of the corroding metal obey Freundlich and Langmuir isotherms, respectively. Polarization studies revealed that A9O3AP acts as a mixed type inhibitor. Thermodynamic parameters (; ) were calculated using the adsorption isotherms. A probable synergismtic mechanism is proposed.

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