The main objective of this study is to provide more data on the use of natural pozzolan and perlite located in the western region of Algeria as a cement substitute for making mortars with different pozzolan percentages.The results were interpreted by DATA TAFEL. It shows the corrosion rate by correlating the potential as a function of the current density measured for several reinforced pozzolanic mortars immersed in aggressive media (accelerated corrosion) in accordance with various international recommendations.