Abstract

The corrosive inhibitive effect of compound on mild steel in molar solution of H₂SO₄ and HCl was investigated by weight loss, potentiodynamic polarization and electro chemical impedance studies. 1-Acetyl-4, 5-dihydro-5-phenyl-3-(thiophen-2yl) pyrazoles was synthesized, characterized and structure elucidated by FTIR, ¹H NMR, ¹³C NMR. The corrosion inhibition rate was increased by increasing the concentration of inhibitor (1-acetyl-4, 5-dihydro-5-phenyl-3-(thiophen-2yl) pyrazoles) and decreases with increase in temperature. The interaction between inhibitor and surface of steel obey Langmuir isotherm.

Keywords

Pyrazole, Mild steel, Inhibition efficiency, Synergetic effect, Adsorption isotherm, Kinetics