The influence of Ethyl-2-aminothiazole-4-carboxylate as a copper corrosion inhibitor in 1M HCl acid was investigated using both weight loss and polarization techniques. At 40 oC by raising the inhibitor concentration reduces corrosion current density and rate while improving inhibition efficiency and surface coverage, on the other hand the efficiency decreases as temperature rises at 50 and 60 oC. By Increasing inhibitor concentrations led to higher activation, enthalpy, and free adsorption energy, as well as lowering entropy energy, demonstrating that the inhibitor have sufficient energy to initiate the adsorption process, through creation of a layer of film on the surface of the metal due to the presence of molecules of both amines and thiazole, as well as the presence of nitrogen, oxygen and sulfur atoms, which have an effective effect on inhibition and corrosion prevention indicating that it is an excellent form of inhibitor.