Concrete cover protects against reinforcement against corrosion. There are many corrosion conditions in structures in the Tripoli area, and we have used fresh or natural water to make the concrete mixture Fresh water and local aggregate were used in the preparation of samples of reinforced concrete with different proportions of water to cement as well as a different concrete cover and the concrete cover was between (25 and 70) mm with a change in the ratio of water to cement by ratios of (0.45 and 0.75) mm using natural water (FW) for the city of Tripoli and it was found that these samples are affected in terms of corrosion rate and electrochemical behavior. The electrochemical behavior of the samples was monitored for Two year. The results showed an effect on the corrosion rate of samples containing the ratio of water to cement and concrete cover mixed with conditions of Exposure to fresh water. The corrosion rate of rebar has been studied for beams and cubes within the climatic environment (Climatic chamber environment) (C.C.E).................. Keywords: .......Concrete cover- corrosion- Fresh water – reinforced concrete- Climatic Chamber Environment.