Copper-nickel alloy is known for its good resistance to corrosion in different environments. Its good mechanical properties allow it to be used for the manufacture of coins for the first time in the UK at 1947. It was also used to manufacture parts of Moroccan currencies. Thus, in this work we have studied the behavior of one of the most used pieces of Moroccan currency, coin of 1 DH (1MAD) 2002 type, in different environments. This study was conducted by stationary and transient electrochemical methods coupled with surface analysis by EDX. Results obtained show that this piece resists in NaCl 3% neutral environment with a temperature of 298 K, which simulates the Mediterranean marine environment. By cons, it is degraded as soon as the environment becomes acidic or when temperature rises. Moreover, analyzes by EDX show the formation of a protective film of Cu2O on the surface after 20 hours of immersion of the part in the corrosive medium.
