Experimental Studies on the Corrosion Inhibition Potentials of Novel Pyrazoles-Based Compounds for Mild Steel in 0.5 M HCl

Novel pyrazoles namely 1-(3-(4-hydroxyphenyl)-5-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-1-yl)ethanone (HTPE) and 4-(5-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-3-yl) aniline (TPA) was synthesized from the condensation of chalcone derivatives with hydrazine hydrates, and their inhibitive characteristics for the corrosion of mild steel in 0.5 M hydrochloric acid solution were investigated to both chalcons and pyrazoles compounds by electrochemical method, and the scanning electron microscopy (SEM). The result shows the chalcone compound (ATP) has been essential in preventing mild steel corrosion in an acidic solution.