Effects of Cu Content on the Corrosion Resistance and Antibacterial Property of Low Carbon Steels

Low carbon steels require not only high strength and hardness，but also good corrosion resistance and antibacterial property.In order to study the corrosion resistance and antibacterial property of different low carbon steels with different Cu contents under complex working conditions，four steels with different microstructures were selected: MS1500，S-Ten2，F92 and 17-4PH.Acidic (pH＝3)，neutral (pH＝7)，alkaline (pH＝11) and bacterial solutions (escherichia coli and staphylococcus) were selected to simulate the complex environment in which the materials were applied.Their corrosion resistances in these four environments were compared and analyzed by potentiodynamic polarization，electrochemical impedance spectroscopy test and immersion test.The bacteriostatic experiment of the materials was carried out in the bacteria solution environment.In addition，the effect of different Cu precipitation states on the bacteriostatic performance of low carbon steel was further studied through bacteriostatic experiments on S-Ten2 lo