4.1 Article

Enhanced pitting resistance and antibacterial durability of Cu-bearing stainless steels via tailoring Cu distributions

期刊

MATERIALIA
卷 31, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.mtla.2023.101880

关键词

Cu; Stainless steel; Microstructure; Corrosion resistance; Antimicrobial property

向作者/读者索取更多资源

The addition of copper to stainless steel enhances its antimicrobial properties. The distribution state of copper within the microstructures affects the corrosion resistance and antimicrobial durability. Copper in solid solution enhances pitting resistance and has comparable antimicrobial properties to aged samples with copper-precipitates. Solution-treated copper-bearing stainless steel has the potential to durably release copper ions.
The addition of Cu to stainless steel has been demonstrated to enhance antimicrobial properties, however, its distribution state can significantly affect corrosion resistance and antimicrobial durability. In this work, the influence of Cu distribution state within microstructures (solid solution versus segregated into precipitates) on corrosion resistance and antimicrobial properties was investigated using a 4 wt.% Cu-bearing stainless steel. Corrosion resistance assessed using both electrochemical and immersion tests, showed that material with Cu in solid solution exhibited enhanced pitting resistance and comparable antimicrobial properties in comparison to aged samples that contained Cu-precipitates. Antimicrobial tests demonstrated that after 24 h of exposure to material surfaces, Escherichia coli microbial numbers were reduced by greater than 90% at both Cu states, which was attributed to a synergistic effect of interaction between bacteria and Cu-doped surfaces, and high concentrations of released Cu ions in surrounding fluid. Solution-treated SS-Cu exhibited a release capability of Cu ions comparable to aged Cu-bearing stainless steel, with Cu enrichment within the passive film considered as the source of discharged Cu ions. This characteristic endows solution-treated Cu-bearing stainless steel with the potential of releasing Cu ions durably.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.1
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据