The interaction of binary copper alloys with aggressive environment may results in the formation of an adhering and protective film with time. In the present study, we investigated the corrosion of the Cu-Zn (brass) and Cu-Ni (cupronickel) alloys in 3% NaCl environment to simulate the sea waterdesalinationplants conditions. Alloys corrosion was investigated by electrochemical tests and weights loss measurements. The morphology and the nature of corrosion products formed at open circuit potential in 3% NaCl solution were analyzed using scanning electron microscopy and confocal micro-Raman spectroscopy. The results show the formation of Cu2O, CuO, Cu3Zn(OH)6Cl2 and ZnO for the brass, while for the cupronickel, the corrosion products show the incorporation of nickel in the corrosion products (Cu2O, CuO, Cu3Ni(OH)6Cl2 and NiO), which reduce the denickelisation of Cu-Ni alloy. Our results clearly show that the copper-nickel alloy is more resistant towards corrosion in NaCl environment than copper-zinc alloy.