Study The Effect of Heat Treatments and Cold Work on the Corrosion Erosion Behavior of (Al-2Cu-2Mg) Alloy.Abstract:This study deals with the effect of heat treatment and cold work on the corrosion erosion behavior of (Al-2Cu-2Mg) alloy in salt solution ( 1M NaCl ) at room temperature. The weight change method and microscopic examination are used in this study. Alloy without treatment, solution treated, Artificial aged and cold working at different ratios with artificial aged are used to complete this study.The result of effects of heat treatment on the corrosion erosion behavior of alloy in salt solution showed different corrosion behavior for the same alloy under the same conditions but different heat treatment . Solution heat-treated alloy have the lowest losing weight levels and corrosion erosion rate compared with the other states untreated and artificial aged alloys which showed convergence  in  the value of weight loss and corrosion rate at the final stages of the test .On the other hand to study the effect of the cold work on the corrosion erosion behavior of alloy the cold working at different ratios used ( 0%,15%,19% ) . The results showed that an increase in cold work ,  cause to increase weight loss and corrosion erosion rate, the result showed the rate of corrosion of the alloy at (15%) cold working ratio reached (0.000051 g/cm2.hr) and increased to reach  (0.00013 g/cm2.hr) at (19%) cold working ratio .