Effects of Antibacterial Treatment Temperature on the Properties of Copper-Bearing Antibacterial Duplex Stainless Steels

Abstract:

Antibacterial copper-rich phases such as ε-Cu were precipitated in copper-bearing antibacterial duplex stainless steels after antibacterial treatment. In this paper, the effects of antibacterial treatment on the corrosion resistance properties of copper-bearing antibacterial duplex stainless steels were investigated by electrochemical methods. The film-cover method was used to antibacterial tests.The results showed that as the antibacterial treatment temperature increased in the rang of 540~580 , the copper-rich precipitates grew faster and evolved from granular into rod-like. With the proportion of rod-like copper-rich phases in matrix increased, the resistant to pitting corrosion decreased and the positions of copper-rich phase precipitated were apt to become pitting nucleation source.The presence of ε-Cu and other copper-rich phases in passive film reduced the overall potential and passive film resistance, decreasing the stability of passive film. Antibacterial test showed that with the treatment temperature increased, the volume fraction and the uniformity of the distribution of copper-rich precipitates in the matrix first increased, then decreased, resulting in the changes in antibacterial properties of the steels, and 560 obtained the best antibacterial effect.

• Periodical: Advanced Materials Research (Volume 486)
• Pages: 289-296
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.486.289
• Online since: March 2012
• Authors: Hong Liang Xiang, Jin Chun Fan, Dong Liu, Pei Pei Guo
• Keywords: Antibacterial Properties, Antibacterial Treatment Temperature, Copper-Bearing Duplex Stainless Steel, Corrosion Resistance, ε-Cu

References

[1] Suzuki, S., Nakamura, S., Ookubo, N., Hasegawa, M. and Miyakuso, K: CAMP-ISIJ(1999) 12, 518.

[2] Chen SH, Qi LM, Zhang JD, Dong JS, Yang K: Acta Metall Sinica vol 40(2004), p.8. (In Chinese).

[3] NAN Li, LIU Yongqian, YANG Weichao, XU Hui, LI Ying and LIU Manqi: Acta Metallurgica Sinica vol 43(2007), p.1065.

[4] Li Nan, Ke Yang: Journal of Materials Science & Technology vol 26(2010), p.941.

[5] YANG Ke, DONG Jiasheng, CHEN Sihong, and LU Manqi: Chinese Journal of Materials Research vol 20(2006), p.523.

[6] Gi-wei Huang. Effects of Copper and Aging Treatment on Properties of Antimicrobial Martensitic Stainless Steels. (Ph.D. Thesis, I-Shou University, TaiWang. 2005).

[7] Hong I T and Koo C H: Materials Science and Engineering vol 393A (2005), p.213.

[8] Ke YANG and Manqi LÜ: J．Mater．Sci．Technol. vol 23(2007), p.333.

[9] L. Colombier and J. Hochman: Corrosion Resistant Steels and Heat Resistant Steels(Ślask Publishing House, Poland 1964).

[10] LUO She-ji and WANG Rong: Corrosion Science and Protection Technology vol 21(2009), pp.599-603. (In Chinese).

[11] Jacek Banas and Andrzej Mazurkiewicz: Materials Science and Engineering vol A277 (2000), p.183.