Antibacterial properties and corrosion resistance of AISI 420 stainless steels implanted by silver and copper ions |
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Authors: | Hong-wei Ni Han-shuang Zhang Rong-sheng Chen Wei-ting Zhan Kai-fu Huo Zhen-yu Zuo |
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Institution: | 1.Key Laboratory for Ferrous Metallurgy and Resources Utilization of the Ministry of Education, School of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan,China |
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Abstract: | Silver or copper ions are often chosen as antibacterial agents. But a few reports are concerned with these two antibacterial
agents for preparation of antibacterial stainless steel (SS). The antibacterial properties and corrosion resistance of AISI
420 stainless steel implanted by silver and copper ions were investigated. Due to the cooperative antibacterial effect of
silver and copper ions, the Ag/Cu implanted SS showed excellent antibacterial activities against both Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus) at a total implantation dose of 2×1017 ions/cm2. Electrochemical polarization curves revealed that the corrosion resistance of Ag/Cu implanted SS was slightly enhanced as
compared with that of un-implanted SS. The implanted layer was characterized by X-ray photoelectron spectroscopy (XPS). Core
level XPS spectra indicate that the implanted silver and copper ions exist in metallic state in the implanted layer. |
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