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Cite this article:
. . Acta Metall Sin, 2007, 43(10): 1065-1070 .
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Abstract Researches on the antibacterial properties and relevant mechanism of copper-contained ferritic and austenitic antibacterial stainless steels have been made in this paper. Experimental results displayed that copper-contained antibacterial stainless steels have the broad-spectrum antibacterial functions, and the antibacterial rate against most of the Gram-negative bacteria and Gram-positive bacteria in the present work reached above 99.0%. Through research on the different action time of E.coli in contact with ferritic antibacterial stainless steel, it was proved that the antibacterial rate of a stainless steel was related to the action time, and the antibacterial rate reached 99.9% only when the steel contacted with the bacteria for about 150min. The observation on AFM indicated that the antibacterial mechanism of the antibacterial stainless steels should be attributed to leaking of the contents and shriveling of the cells in the bacteria . The electrochemical experiments showed that after contacted with E.coli, the dissolution of Cu ions on the surface of antibacterial stainless steels became faster, resulting in a decrease of the pitting potential of the steel.
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Received: 01 February 2007
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