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XPS Analysis of Corrosion Product Scale on Surface of Silver-bearing Antibacterial Duplex Stainless Steel |
Dong LIU,Hongliang XIANG( ),Chunyu LIU |
1. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, China |
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Abstract Silver-bearing antibacterial duplex stainless steels were prepared by adding silver granules (code name A) or 150~300 μm Cu-Ag particles (code name B) respectively. The two steels were then subjected to solid solution treatment at 1150 ℃. The surface passive films formed on the two steels after potentiodynamic polarization test in bacteria bearing liquid were analyzed by X-ray photoelectron spectroscopy (XPS). The results indicated that there exist silver as atomic Ag and oxide AgO, while chromium as CrO2, CrO3and Cr(OH)3in the surface passive film of the steel A. However silver as oxides of AgO, Ag2O and Ag3O, while Cr as chromic oxides of multi-valence present in the surface passive film of the steel B. In comparison with the passive film on the steel A, that on the steel B has higher amount of Cr2O3, molybdenum oxides and MoO42-, but lower amount of hydroxides/hydrates, meaning that the stability of the passive film on the steel B is better.
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Received: 17 March 2017
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Fund: Supported by Major Projects Fund from Fujian(2017HZ0001);Industrial Technology Joint-Innovation Projects of Fujian(FG-2016001);Young and Middle-aged Scientific Research Project from Fujian Education Department(JAT160066);Science and Technology Project of Fuzhou(2018-G-68);Marine High-tech Industry Development of Fujian ((2014)14) |
Corresponding Authors:
Hongliang XIANG
E-mail: hlxiang@fzu.edu.cn
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