Mannich base of Barbituric acid namely 1-[morpholin-4-yl (phenyl) methyl] Pyrimidine 2, 4, 6- trione (BAMB) and 1-[aniline (phenyl) methyl] pyrimidine-2, 4, 6-trione (BAAB) were synthesized. Zn (II), Cd (II) and Hg (II) complexes of the above compounds were prepared and characterized using IR. In addition to this the above complexes were characterized by using analytical techniques such as conductance measurement. A preliminary corrosion inhibition efficiency of BAMB and BAAB were studied by weight loss method. The above studies proved that the ligands and their metal complexes can be applied for environmental related fields and aims at the inhibition towards corrosion of mild steel in hydrochloric acid medium at different concentration.