Organic inhibitors, such as azoles, Schiff bases and amino acids are widely used to protect CuNi alloy from corrosion 14, 15, 16. This condition causes significant corrosion issues in desalination plant units and cooling systems 12, 13. The source of the presence of sulfide ions in the seawater comes from industrial waste and/or bacteriological processes (Sulfate reducing bacteria SRB) 11. Where the sulfide ions convert the strong Cu 2O passive film to a tenuous black layer 10. However, this passive film can be eliminated by sulfide containing seawater 9. The corrosion resistance of CuNi (90:10) is very high due to the formation Cu 2O passive film on the alloy surface 7, 8. The CuNi (90:10) alloy is the best alloy for constructing condensers and heat exchangers in desalination plants 5, 6. During the desalination processes, the saline water pass though various tubes and units contain different metal and alloys 4. The main task of desalination plants is to remove salts from marine water to produce drinking water 3. Desalination from sea water is one of our time's main challenges 1, 2.
