This study deals with the effect of heat treatment and thermo-mechanical treatment on the corrosion behavior of (Al-2Cu-2Mg) alloy by using simple immersion in salt solution ((3% NaCl) by weight) and acidic solution((3% HCl) by volume) at room temperature. The weight change method and microscopic examination are used in this study. Alloy without treatment, solution heat treated at (500 °C), artificial aged at (170 °C) and thermo-mechanical treated (12%,24%) are used to complete this study.  
The result of effects of heat treatment on the corrosion behavior of alloy in salt solution showed different corrosion behavior for the same alloy under the same conditions but at different heat treatments. Solution heat-treated alloy has the lowest loss weight levels compared with the other states untreated and artificial aged alloys which showed convergence  in corrosion rate at the final stages of the test .In other hand the results of  effects of  thermo-mechanical treatment on the corrosion behavior in salt solution showed that the lower cold working percent cause vibration in corrosion rate while high cold working percent cause in reducing weight and lower corrosion rate .  
The result of effects of heat treatment on the corrosion behavior of alloy in acidic solution showed that the solution-treated alloy have the lowest weight losing compared with the untreated and artificial aged alloys where the  last one show a mid state between the other states. In the other hand the results of effects of thermo-mechanical treatment on the corrosion behavior in acidic solution showed that the corrosion has been dropped with increase the cold work ratio and the results showed decreasing in weight loss with increasing the percent of cold working.
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