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In this study, the corrosion behaviour of both AA 5083 and AA 5086 aluminium alloys in the marine environment was investigated in the Tigris and Shatt Al Arab water media before and after recrystallization annealing at room temperature (23 0 C). The corrosion resistance of AA 5083 marine aluminium alloy shows an improvement after recrystallization at a temperature of 350 0 C for 15 minutes from (708.5 × 10-6) to (513 × 10-6 mmpy) in Tigris, while in Shat Al Arab the improvement was from (1.84 × 10-5) to (217.7 × 10-6 mmpy) using the Tafel test. While the corrosion resistance in AA5086 decreased in both Shat Al Arab and Tigris River, in Tigris the decreasing was from (1.259 × 10-3) to (7.418 × 10-3 mmpy), while in Shat Al Arab the decreasing was from (28.25 × 10-6) to (305 × 10-6 mmpy). Both alloys suffered from uniform corrosion in the Tigris River. In Shat Al Arab both alloys suffered from pitting corrosion. Hardness for both alloys shows decreasing after recrystallization annealing.