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

YU Shuo-shuo, XU Zheng-meng, TANG Yuan-shou, SI Yu, ZHOU Xin, YANG Hao-cheng, LI Ke-jian, MA Yi-long, GE Yi-bo

doi:10.16577/j.issn.1001-1560.2023.0030

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Materials Protection >

2023 , Vol. 56 >Issue 2: 16 - 23

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0030

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

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1.School of Metallurgy and Material Engineering，Chongqing University of Science and Technology，Chongqing 401331，China；2.Shanghai Entai Equipment Technology Co.，Ltd.，Shanghai 201800，China

Received date: 2022-08-17

Revised date: 2022-09-20

Accepted date: 2022-10-05

Online published: 2023-08-11

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Abstract

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 low carbon steels treated with different heat treatments.Results showed that F92 and 17-4PH low carbon steels exhibited excellent corrosion resistance in four environments.The corrosion resistances of the four materials were similar in strong alkali environment.The corrosion resistance of S-Ten2 in alkaline environment was better than that in acidic and neutral environments，and the corrosion resistance of MS1500 was relatively stable in all experimental environments.The corrosion resistances of F92 and 17-4PH were better than that of MS1500 and S-Ten2 in staphylococcal fluid.The antibacterial property of S-Ten2 samples with 900 ℃-6 h water quenching and 560 ℃-6 h air cooling was better than that with 700 ℃-5 min solid solution in escherichia coli solution，indicating that reasonable heat treatment could make the Cu precipitate achieve ideal bacteriostatic effects，but in staphylococcal solution，the bacteriostatic property of samples treated with three different heat treatments were not good.

Key words： low carbon steel; corrosion property; antibacterial property; electrochemistry; aging heat treatment; Cu content

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YU Shuo-shuo, XU Zheng-meng, TANG Yuan-shou, SI Yu, ZHOU Xin, YANG Hao-cheng, LI Ke-jian, MA Yi-long, GE Yi-bo . Effects of Cu Content on the Corrosion Resistance and Antibacterial Property of Low Carbon Steels[J]. Materials Protection, 2023 , 56(2) : 16 -23 . DOI: 10.16577/j.issn.1001-1560.2023.0030

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