Multi-element-resolved electrochemical corrosion analysis. Part I. Dissolution behavior and passivity of amorphous Fe50Cr15Mo14C15B6

Abstract

Multi-element dissolution analysis of amorphous Fe50Cr15Mo14C15B6 in 0.1 M H2SO4 was investigated electrochemically and by coupled online mass spectrometry. We fully discuss the most important aspects of the application of the newly-developed methodology to study complex multi-elemental alloys. The resulting partial dissolution rates of Fe, Cr and Mo reflect the passive behavior and are compared to the measured total current density as function of time. The deviations between the added elemental dissolution currents and the measured total current density are discussed. Furthermore, the inferred growth of oxide thickness was correlated to results obtained from surface analysis. (C) 2014 The Authors. Published by Elsevier Ltd.