The present investigation deals with corrosion of mild steel in 1M HCl and the inhibitive effect of Schiff base ligands [ N-(p-anisalidene)- 6-methoxy-1,3-benzothiazol-2-amine (AMBTA) and N-(2-hydroxy-1-naphthalidene)-6- methoxy-1,3-benzothiazol-2-amine (HNMBTA)] derived from 2-amino-6-methoxy-benzothiazole (AMBT) by weight loss method and electrochemical studies. The surface morphology of the mild steel plates in the presence and absence of the inhibitors have been examined by the study of the SEM.