
Aim of the present work is to synthesize 1-N amido 5-methyl 3(3-hydroxy) phenyl amino 1,2-pyrazole and its nitroso and benzoyl derivatives. Corrosion inhibition tendency of these compounds has been studied using weight loss method at different concentration of synthesized compounds at 300C in presence of HCl (0.1M) and H2SO4 (0.1M). Results of gravimetric analysis reveals that 1-N amido 5-methyl 3(3-hydroxy) phenyl amino 1, 2-pyrazole shows more corrosion inhibition efficiency towards H2SO4 as compared to HCl. Derivatives of these compounds also shows inhibition efficiency against corrosion of mild steel in acidic medium.