Myburg, GVarga, KBarnard, WOBaradlai, PTomcsanyi, LPotgieter, JHLouw, CWVan Staden, MJ2007-02-082007-06-072007-02-082007-06-071998-10Myburg, G, et al. 1998. Surface composition of Ru containing duplex stainless steel after passivation in non-oxidizing media. Applied surface science, vol 136, 2 January, pp 29-350169-4332http://hdl.handle.net/10204/1618http://hdl.handle.net/10204/1618In this paper, results obtained by surface analysis Auger Electron Spectroscopy (AES) and X-ray Photoelectron Spectroscopy (XPS) studies performed on the passive layers that formed spontaneously on duplex stainless steels (DSSs) and Ru containing (0.3%) duplex stainless steel(DSS:Ru) in HCl and H2SO4solutions are presented in order to explain the roles of the different alloying elements in the passivation process. From the AES studies, it followed that the Cr concentrations were slightly higher (about 3%)in the passive layers of both materials, compared to their bulk concentrations, whereas the Ni concentrations were reduced to less than half their bulk concentrations at the outer surfaces of the passive layers, with an increasing concentration gradient towards the bulk of the material. Enrichment of Mo at outer surface of the passive layer was only observed in the case of the (DSS:Ru) samples which were passivated in HCl. The XPS results indicated that the passive layer on the DSS:Ru samples contained more Cr2O3 and Fe2+ than Cr(OH)(3) and Fe3+, respectively, in the passive layer, compared to the DSS samples without Ru.240500 bytesapplication/pdfenCopyright: 1998 Elsevier Science BVCorrosionStainless steelsRutheniumsSurface passivationsArticleMyburg, G., Varga, K., Barnard, W., Baradlai, P., Tomcsanyi, L., Potgieter, J., ... Van Staden, M. (1998). Surface composition of Ru containing duplex stainless steel after passivation in non-oxidizing media. http://hdl.handle.net/10204/1618Myburg, G, K Varga, WO Barnard, P Baradlai, L Tomcsanyi, JH Potgieter, CW Louw, and MJ Van Staden "Surface composition of Ru containing duplex stainless steel after passivation in non-oxidizing media." (1998) http://hdl.handle.net/10204/1618Myburg G, Varga K, Barnard W, Baradlai P, Tomcsanyi L, Potgieter J, et al. Surface composition of Ru containing duplex stainless steel after passivation in non-oxidizing media. 1998; http://hdl.handle.net/10204/1618.TY - Article AU - Myburg, G AU - Varga, K AU - Barnard, WO AU - Baradlai, P AU - Tomcsanyi, L AU - Potgieter, JH AU - Louw, CW AU - Van Staden, MJ AB - In this paper, results obtained by surface analysis Auger Electron Spectroscopy (AES) and X-ray Photoelectron Spectroscopy (XPS) studies performed on the passive layers that formed spontaneously on duplex stainless steels (DSSs) and Ru containing (0.3%) duplex stainless steel(DSS:Ru) in HCl and H2SO4solutions are presented in order to explain the roles of the different alloying elements in the passivation process. From the AES studies, it followed that the Cr concentrations were slightly higher (about 3%)in the passive layers of both materials, compared to their bulk concentrations, whereas the Ni concentrations were reduced to less than half their bulk concentrations at the outer surfaces of the passive layers, with an increasing concentration gradient towards the bulk of the material. Enrichment of Mo at outer surface of the passive layer was only observed in the case of the (DSS:Ru) samples which were passivated in HCl. The XPS results indicated that the passive layer on the DSS:Ru samples contained more Cr2O3 and Fe2+ than Cr(OH)(3) and Fe3+, respectively, in the passive layer, compared to the DSS samples without Ru. DA - 1998-10 DB - ResearchSpace DP - CSIR KW - Corrosion KW - Stainless steels KW - Rutheniums KW - Surface passivations LK - https://researchspace.csir.co.za PY - 1998 SM - 0169-4332 T1 - Surface composition of Ru containing duplex stainless steel after passivation in non-oxidizing media TI - Surface composition of Ru containing duplex stainless steel after passivation in non-oxidizing media UR - http://hdl.handle.net/10204/1618 ER -