Corrosion is the process of breaking down or destruction of a material, especially a metal, through chemical reactions. The most common form of corrosion is rusting, which occurs when iron combines with oxygen and water .Iron is used in the form of stainless steel for making cutlery ,hospital and food service equipment .It is the most common chepest and versatile metal used in industry1. The use of corrosion inhibitor is one of the most effective measures for protecting metal surfaces against corrosion in acidic environments2. The inhibiting action of these compounds is attributed as a first stage, to the adsorption of the additives to the metal/solution interface. The adsorption process depends upon the nature and surface charge of the metal, the type of aggressive media, the structure of the inhibitor and the nature of its interaction with the metal surface3. Some heterocyclic compounds as corrosion inhibitors for mild steel in acidic medium4,5.The use of inhibitors is one of the most practical methods for protection against corrosion6-7.Amino acids complex with metals like Zn, Cu, CO ,Fe, Cr find wide spread use of corrosion inhibitors because they are non toxic8-12. Adsorption of the inhibitor molecules mainly depends on the charge and nature of the metal surface , electronic characteristics of the metal surface, temperature, adsorption of the solvent, ionic species and the electrochemical potential at the solution interface13. Corrosion is the slowest process responsible for damage the metallic materials .The process of corrosion is harmful and it is essential to protect metals from corrosion. The inhibitor which are used on metal surface which avoid direct contact between metal and medium .The present investigation is to study corrosion inhibition effect 2-Amino 5-Bromo pyridine (ABPY)and its metal ion chelates on mild steel in 0.1N HNO3,0.1N H2SO4 and 0.1 N HCl .