Alkali activated concrete (AAC) has a lot of potential as a more long-term alternative to ordinary Portland cement (OPC). The AAC was prepared from fly-ash (FA), ground granulated blast furnace slag (GGBS) with sodium hydroxide (SH), and sodium silicate (SS) solutions. The concentration of SH varies to 10M, 12M, and 14M, and all the specimens were subjected to accelerated corrosion, to perform the non-destructive test after the corrosion of the steel rebars, and to compare the strength and corrosion properties with AAC and OPC. The ratio of SS to SH was taken as 2.5 and the solution-to-binder ratio was taken as 0.5 and 0.45 and grade of OPC as M35. Half-cell potential (HCP) Test were conducted on OPC, A70/30, and A65/35 of different molarities and solution to binder ratio. In the experimental conditions of this research, the AAC sample reinforced with FA-GGBS exhibits polarization resistance values comparable to corroding systems based on Portland cement. The mass loss of corrode steel rebars was 10%. The probability of corrosion of OPC and AAC is almost identical but due to environmental concern and low cost we can use AAC instead of OPC. The microstructure of AAC was analysed using a scanning electron microscope (SEM) both before and after the corrosion.