Effects of copper content on the antibacterial performance and corrosion resistance of CoCrMoCu alloy.

Zhun Yin; Yi-bin Ren; De-song Zhan

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Effects of copper content on the antibacterial performance and corrosion resistance of CoCrMoCu alloy.

VernacularTitle:铜含量对钴铬钼铜合金抗菌性和耐腐蚀性的影响
Author: Zhun YIN ^{1
,

2
,

3
,

4} ; Yi-Bin REN ⁵ ; De-Song ZHAN ^{1
,

2
,

3
,

4}
Author Information

1. Dept. of Prosthetics, School of Stomatology, China Medical University, Shenyang 110002, China
2. Central Laboratory, School of Stomatology, China Medical University, Shenyang 110002, China
3. Liaoning Province Key Laboratory of Oral Disease, Shenyang 110002, China
4. Liaoning Province Oral Disease Translational Medicine Research Center, Shenyang 110002, China.
5. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
Publication Type:Journal Article
Keywords: CoCrMo alloy; antibacterial performance; copper containing alloy; corrosion resistance
From: West China Journal of Stomatology 2018;36(2):178-183
CountryChina
Language:Chinese
Abstract:
OBJECTIVEThis study aimed to determine the effects of copper content on the corrosion resistance of CoCrMoCu alloy and its in vitro antibacterial performance.
METHODSCoCrMoCu specimens with different Cu contents (2%, 3%, 5%, and 7%) were prepared by vacuum melting method. CoCrMo without Cu served as control. The corrosion resistance of the specimens was measured by electrochemistry. The antibacterial effects of the specimens on Staphylococcus aureus and Escherichia coli were analyzed by coating-film method.
RESULTSCompared with CoCrMo without Cu, the addition of 2%-5% Cu to CoCrMo improved the pitting and uniform corrosion of CoCrMo alloy and decreased the corrosion current density. The antibacterial performance of CoCrMoCu alloy increased with increased Cu content. The antibacterial rate of alloy was 99% when Cu content exceeded 5%.
CONCLUSIONSCu addition had a statistically significant influence on the corrosion resistance and antibacterial performance of CoCrMoCu. CoCrMoCu has better corrosion resistance and antibacterial performance when Cu content is 5%.