Corrosion is one of the major reasons for premature degradation of reinforced concrete structures. Modern construction must include reinforced concrete coupled shear walls that provide stability and resistance to lateral loads like wind and seismic pressures. However, environmental factors and exposure to corrosive substances over time can cause these shear walls to corrode.Corrosion considerably decreased and altered the seismic performance and collapse mechanism of reinforced concrete members during lateral loading conditions. In this project effect of corrosion in reinforced concrete coupled shear wall under lateral load, modified by replacing 15% of cement with metakaolin is studied by inducing corrosion on specimens using electrochemical methods for 0, 9, 15, and 30 days. The corrosion rates and concrete resistivity of each specimen are investigated. The load-carrying capacity of the corrosive medium exposed, deteriorated structures were found to be lesser when compared to non-corroded under lateral load. The test results indicate that the stiffness decreases up to 36.09%, Hysterisis response decreases up to 67.28%, displacement drift decreases up to 40.74%, ductility decreases up to 19.85%, of corroded shear wall compared to the non-corroded-shear wall.