Monel's corrosion resistance is generally superior to nickel and copper. It is more resistant to reducing media than pure nickel, and corrosion resistance to sulfuric acid, phosphoric acid, and carbon is much better than pure copper oxidation resistant media. In particular, the corrosion resistance to hydrochloric acid has excellent corrosion resistance to hot concentrated alkali. Monel400 alloy has excellent corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid and their derivatives. At the same time, it is more corrosion resistant in copper than copper-based alloys.
Copper-nickel alloy wire, also called Monel wire, is made of monel 400 alloy (UNSN04400 or MCu-28-1.5-1.8 or Ni68Cu28Fe is a kind of sea water, chemical solvent, ammonia sulfur, hydrogen chloride, various acidic media such as sulfuric acid, Hydrogen fluoride, hydrochloric acid, phosphoric acid, organic acids, alkaline media, salts and molten salts all have good corrosion resistance of nickel-base alloy materials.