Journal Published Online: 09 March 2018
Volume 7, Issue 1

Effect of Nitriding on Antibacterial Performance of 8Cr17 and 4Cr13 Martensitic Stainless Steel

CODEN: MPCACD

Abstract

Martensitic stainless steel is widely used for medical apparatus, but it can carry a large number of bacteria and cause a potential risk of infection because it has no antimicrobial ability. In this paper, nitriding of 4Cr13 and 8Cr17 martensitic stainless steel was conducted to improve the antibacterial activity. The surface morphology and phase constituents of nitrided 4Cr13 and 8Cr17 specimens were characterized using scanning electron microscopy and X-ray diffraction. Nitrogen concentration profiles in the cross sections of the nitrided specimens were obtained by glow discharge spectroscopy. The antibacterial properties of this nitrided layer were evaluated by a plate-counting method. The antimicrobial ratios of nitrided 4Cr13 and 8Cr17 martensite stainless steel against Staphylococcus aureus were 98.13 % and 99.22 %, respectively, after 12 h. The results showed that the formations of chromium nitride (CrN) and two iron nitrides (Fe3N and Fe4N) are of vital importance to the antibacterial properties of martensitic stainless steel.

Author Information

Li, Jianfang
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China
He, Xiaojing
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China
Zhang, Guannan
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China
Zhang, Xiangyu
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China
Tang, Bin
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, China
Pages: 8
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Stock #: MPC20170058
ISSN: 2379-1365
DOI: 10.1520/MPC20170058