... acidic medium such as sulfuric acid, hydrofluoric acid, hydrochloric acid, phosphoric acid, an organic acid, alkaline medium, salt nickel ... Ni65%, plus a small amount of Fe (1-2%). The organizational structure of the single-phase austenite.Monel 400 ... various acidic medium such as sulfuric acid, hydrofluoric acid, hydrochloric acid, phosphoric acid, an organic acid, alkaline medium, the salt and ...