The fundamental objective of this research is to explore the impact of copper content on corrosion resistance of dental amalgam. Five alloys have been cast made out of the steady level of tin (30wt %) and the copper content is fluctuated from 5 to 25wt% with an interim of 5%. Copper is increased at the expense of silver. The specimens were prepared according to ADA specification No. 1 and have been stored at 37±1 ?C. The corrosion test has been carried out according to ASTM standard ( G5 – 87) and at 37±1 ?C. Two types of electrochemical tests were made an Open Circuit Potential (OCP) – time measurements, and Potentiodynamic polarization in artificial saliva at 37 ± 1 oC. From the obtained results, it’s obvious that the Ecorr is shifted to the positive side and a reduction in the mean corrosion current densities with copper content increasing, hence, increasing corrosion resistance with increasing copper content by 46 % compared to low copper dental amalgam.