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Austenitic and duplex stainless steels in simulated physiological solution characterized by electrochemical and X‐ray photoelectron spectroscopy studies
Author(s) -
Kocijan Aleksandra,
Conradi Marjetka,
Schön Peter M.
Publication year - 2012
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.32513
Subject(s) - materials science , x ray photoelectron spectroscopy , austenite , oxide , duplex (building) , corrosion , austenitic stainless steel , metallurgy , electrochemistry , cyclic voltammetry , chemical engineering , electrode , microstructure , chemistry , dna , biology , engineering , genetics
A study of oxide layers grown on 2205 duplex stainless steel (DSS) and AISI 316L austenitic stainless steel in simulated physiological solution is presented here in order to establish the possibility of replacement of AISI 316 L with 2205 DSS in biomedical applications. The results of the potentiodynamic measurements show that the extent of the passive range significantly increased for DSS 2205 compared to AISI 316L stainless steel. Cyclic voltammetry was used to investigate electrochemical processes taking place on the steel surfaces. Oxide layers formed by electrochemical oxidation at different oxidation potentials were studied by X‐ray photoelectron spectroscopy, and their compositions were analyzed as a function of depth. The main constituents on both the investigated materials were Cr‐ and Fe‐oxides. Atomic force microscopy topography studies revealed the higher corrosion resistance of the DSS 2205 compared to the AISI 316L under the chosen experimental conditions. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012.