This paper presents an analyze the role of chlorides in causing corrosion in the alkali-activated slag (AAS) concrete, its mechanism of action, the critical threshold on. Rapid Chloride Permeability test (RCPT) was conducted to measure the chloride permeability, relative permeability (RP) and the AC resistivity were measured on concrete AAS following the guidelines of ASTM C1202. The result was a contrast between a model of lifetime prediction that can be used to determine the chloride diffusion in concrete structures AAS and represents the influence of cementing AAS in the behavior of the chloride concentration on the surface of concrete, and data acquired with the techniques described above.