Effect of surface passivation on corrosion resistance and antibacterial properties of Cu-bearing 316L stainless steel
By Jinlong Zhao and Dake Xu and M. Babar Shahzad and Qiang Kang and Ying Sun and Ziqing Sun and Shuyuan Zhang and Ling Ren and Chunguang Yang and Ke Yang
Published in Applied Surface Science
NULL
2016
Abstract
The resistance for pitting corrosion, passive film stability and antibacterial performance of 316L-Cu \SS\ passivated by nitric acid solution containing certain concentration of copper sulfate, were studied by electrochemical cyclic polarization, electrochemical impedance spectroscopy (EIS) and co-culture with bacteria. Inductively coupled plasma mass spectrometry (ICP-MS) was used to analyze the Cu2+ ions release from 316L-Cu \SS\ surface. \XPS\ analysis proved that the enrichment of CuO, Cr2O3 and Cr(OH)3 on the surface of specimen could simultaneously guarantee a better corrosion resistance and stable antibacterial properties. The biocompatibility evaluation determined by \RTCA\ assay also indicated that the 316L-Cu \SS\ after antibacterial passivation was completely biocompatible.
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