Effect of Fe/Mn content on mechanical and corrosion properties of 90/10 copper–nickel alloy

Abstract The effect of Fe/Mn content on the metallographic structure, mechanical properties, and corrosion resistance of 90/10 copper–nickel alloy using electrochemical methods, scanning electron microscope, energy dispersive spectroscopy, X‐ray photoelectron spectroscopy, Tafel experiments, and electrochemical impedance spectroscopy measurements were investigated in this paper. The experimental results indicated that the tensile strength of the alloys increases from 326 to 347 MPa with the change of Fe/Mn content, the yield strength of 90/10 copper–nickel alloys is approximately 150 MPa, and the elongation of the alloys was reduced from 51% to 37%. Moreover, as corrosion proceeds, the corrosion product film was mainly composed of Cu 2 O, Cu 2 (OH) 3 Cl. In addition, the Cu–10Ni alloy with Fe/Mn content of 1.69/0.69 has good corrosion resistance properties.