1Department of Mechanical Engineering, Manipal Institute of Technology, Manipal University, Manipal -576104, Karnataka, India.
2Department of Printing & Media Engineering, Manipal Institute of Technology, Manipal University, Manipal -576104, Karnataka, India.
*Corresponding Author Email: prakash.shetty@manipal.edu
The corrosion behavior of 304 SS in 1 N HCl solutions containing different concentrations of N-benzyl - N′ - phenyl thiourea (BPTU) at different temperatures was investigated using potentiostatic polarization technique and weight loss method. The results obtained show that BPTU is an efficient anodic inhibitor with efficiency of greater than 93% in the temperature range studied. The adsorption of this compound on the 304 SS surface was found to obey Temkins isotherm, and the inhibition was governed by physisorption mechanism. The thermodynamic parameters deduced for the adsorption process reveal a strong interaction and spontaneous adsorption of BPTU on the alloy steel surface.
304 SS, Hydrochloric acid, Anodic inhibitor, Potentiostatic polarization, Adsorption, Corrosion inhibition
