[en] The adsorption of H₂SO₄ on the surface of powdered samples of O8X18H10T austenitic stainless steel was studied by a radiotracer method using ³⁵S labelled sulfuric acid (10^-6-10^-3 mol dm^-3) in the presence of a great excess of supporting electrolyte (1 mol dm^-3 HClO₄ or 1 mol dm^-3 NaClO₄+HClO₄, pH=2). In accordance with previous findings, the phenomena observed can be interpreted as a specific sorption of HSO₄^-ions, a logarithmic adsorption isotherm with respect to HSO₄^-ions can be fitted to the experimental results. No remarkable potential dependence of the adsorption of HSO₄^- ions was found in the potential range studied (-100+1100 mV). (author) 10 refs.; 7 figs