|
|
|
| Antibacterial Property of Cu Modified Stainless Steel by Plasma Surface Alloying |
| ZHANG Xiang-yu,HUANG Xiao-bo,JIANG Li,MA Yong,FAN Ai-lan,TANG Bin |
| Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China |
|
|
|
|
Abstract Abstract�� Stainless steel (SS) is not recommended to be used in hospital environments for work surfaces and door furniture due to the lack of antibacterial properties. To this end, a novel SS surface modified layer with both a quick bacterial killing rate and relatively thick has been obtained by plasma surface alloying with Cu. The microstructure, elements distribution and phase identification were analyzed by SEM, GDS, XRD and XPS. A spread plate method was adopted for evaluation of antibacterial property of specimens against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The experimental results demonstrate that the surface modified layer with the thickness of about 26 ��m is uniform and dense. The layer is mainly composed of a mixture of pure Cu, expanded austenite phase and a few Fe3O4 phase. The Cu modified layer exhibits excellent antibacterial effects against E. coli and S. aureus within 1 h. No viable E. coli and S. aureus was found after 3 h (100% killed). The modified layer is relatively thick, hence it is expected that the Cu modified SS will have a durable antibacterial function.
|
|
Received: 04 January 2011
Published: 02 May 2012
|
|
|
|
| [1] |
LI Hao��CHAI Feng��YANG Cai-fu��SU Hang��LUO Xiao-bing. Pitting corrosion of low alloy steel in environment of strongly acidic solution containing chloride ion[J]. Chinese Journal of Iron and Steel, 2017, 52(6): 76-82. |
| [2] |
JIN Shao-shen. Manufacturing process and nondestructive testing of the Cu-Al composite electrode used for zinc electrolysis[J]. Chinese Journal of Iron and Steel, 2017, 35(3): 15-20. |
| [3] |
WANG Wen-xue�� HUANG Jin-chun�� YANG Chao-wu�� ZENG Jing. Analysis on designing and technology of wide slab CCM mold[J]. Chinese Journal of Iron and Steel, 2017, 42(04): 78-83. |
| [4] |
DU Xian-bin��WEI ze-hua��DU Chuan-zhi��ZHAO Pei-lin��FANG Jin-lin. Effect of residual element As��Cu on surface quality of low-temperature hot rolled section steel[J]. Chinese Journal of Iron and Steel, 2017, 42(03): 34-38. |
| [5] |
GENG Hong- ming,WU Xiao- chun. Mechanism of improving machinability of high- Cr steel by adding copper[J]. Chinese Journal of Iron and Steel, 2016, 28(5): 52-56. |
| [6] |
LI Chang- rong, ,ZHANG Feng- shan,ZHANG Qian,ZHANG Lei. Crystallographic analysis on copper precipitating by second phases in steel[J]. Chinese Journal of Iron and Steel, 2016, 28(3): 63-66. |
|
|
|
|
2012, Vol. 19 
