caa a22 4500 477051855 CHVBK 20180405111341.0 cr unu---uuuuu 170330e19961101xx s 000 0 eng 10.1007/BF00243734 doi (NATIONALLICENCE)springer-10.1007/BF00243734 Corrosion behaviour of duplex stainless steels containing minor ruthenium additions in reducing acid media [Elektronische Daten] [J. Potgieter, W. Barnard, G. Myburg, K. Varga, P. Baradlai, L. Tomcsanyi] The dissolution behaviour, as well as the time, potential and concentration dependence of HSO − 4 SO 2t- 4 and Cl− accumulations measured by an in situ radiotracer method on surface oxide-layers of duplex stainless steels containing various amounts of ruthenium as additive are presented and discussed. Several independent techniques, such as mass loss tests, potentiodynamic responses, radiotracer and ICP methods, were used to characterize the complex features of the passivation phenomena of steels modified with ruthenium. The experimental results reveal that the interaction of bisulfate/sulfate ions with passive oxide layer is stronger than those of chloride ions on the stainless steels studied. Both the extent and the strong character of bisulfate/sulfate accumulation are more likely related to the redistribution of the main alloying components (Cr, Ni, Mo) as well as the Ru in the surface oxide-film formed on steels passivated spontaneously in dilute HCl and H2SO4. It is found that the ruthenium additions to the base duplex stainless steel significantly increase the corrosion resistance in reducing acid environments. There is evidence of anodic inhibition and this seems to be responsible for the observed increased corrosion resistance of the duplex stainless steels with small ruthenium additions. Chapman & Hall, 1996 Potgieter J. PPC Technical Services, PO Box 40073, 2022, Cleveland, Johannesburg, South Africa aut Barnard W. Department of Physics, University of Pretoria, 0001, Pretoria, South Africa aut Myburg G. Department of Physics, University of Pretoria, 0001, Pretoria, South Africa aut Varga K. Department of Radiochemistry, University of Veszprém, H-8201, Veszprém, Hungary aut Baradlai P. Department of Radiochemistry, University of Veszprém, H-8201, Veszprém, Hungary aut Tomcsanyi L. Department of Physical Chemistry, University of Veszprém, H-8201, Veszprém, Hungary aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/11(1996-11-01), 1103-1110 0021-891X 26:11<1103 1996 26 10800 https://doi.org/10.1007/BF00243734 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00243734 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Potgieter J. PPC Technical Services, PO Box 40073, 2022, Cleveland, Johannesburg, South Africa aut NATIONALLICENCE 700 1- Barnard W. Department of Physics, University of Pretoria, 0001, Pretoria, South Africa aut NATIONALLICENCE 700 1- Myburg G. Department of Physics, University of Pretoria, 0001, Pretoria, South Africa aut NATIONALLICENCE 700 1- Varga K. Department of Radiochemistry, University of Veszprém, H-8201, Veszprém, Hungary aut NATIONALLICENCE 700 1- Baradlai P. Department of Radiochemistry, University of Veszprém, H-8201, Veszprém, Hungary aut NATIONALLICENCE 700 1- Tomcsanyi L. Department of Physical Chemistry, University of Veszprém, H-8201, Veszprém, Hungary aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/11(1996-11-01), 1103-1110 0021-891X 26:11<1103 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer