Dworschak DBishara MHSIU-WEI CHENGValtiner M.2022-12-142022-12-14202209475117https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122258393&doi=10.1002%2fmaco.202112984&partnerID=40&md5=7f85a160089fbcac79aa7c4cebb6182fhttps://scholars.lib.ntu.edu.tw/handle/123456789/626232Understanding elemental corrosion currents and visualizing corroding topographies provides a detailed insight into corrosion mechanisms at the nanoscale. Here, we develop a strategy to understand the elemental composition, corrosion resistivity, and local stability of passive materials. Specifically, we utilize a pulse voltammetry approach in a novel electrochemical atomic force microscopy (AFM) cell and complement this data by real-time dissolution currents based on spectroelectrochemical online analysis in an inductively coupled plasma mass spectroscopy (ICP-MS) flow cell. We study the oxide properties and their protective behavior when formed under different applied potentials using Alloy 600 as a model sample. Both AFM and ICP-MS data show that passive films formed on Alloy 600 at around +0.3 to +0.4 V in neutral 1 mM NaCl solution are most stable during anodic corrosion at +1.0 V, while AFM further demonstrates that local dissolution occurs, indicating locally varying defect levels in the passive film. In combination with both techniques, our approach provides real-time elementally resolved and localized information of passive film quality under corrosive conditions, and it may prove useful for other corroding materials. © 2022 The Authors. Materials and Corrosion published by Wiley-VCH GmbH.electrochemical AFM; electrochemical ICP-MS; nickel base alloys; passivation; pulse voltammetryInductively coupled plasma; Inductively coupled plasma mass spectrometry; Mass spectrometers; Sodium chloride; Spectroelectrochemistry; Alloy 600; Atomic-force-microscopy; Corrosion current; Corrosion mechanisms; Elemental compositions; Inductively coupled plasma mass spectroscopies; Microscopy imaging; Nano scale; Passive films; Real- time; Dissolutionjournal article10.1002/maco.2021129842-s2.0-85122258393