29. Prof. Philippe Marcus - Fundamentals of Corrosion

[@ElectrochemicalColloquium]

00:00 - Introduction 02:42 - Beginning of the talk 06:28 - Pourbaix diagrams 09:00 - Active, passive and transpassive regions in a CV 13:27 - Probing mechanisms for corrosion 13:53 - Cu(111) example 26:02 - Ordered, disordered and epitaxial passive oxides 38:52 - Dissolution of passive layers 42:19 - Alloys and crystallization of passive layers 45:53 - Localized corrosion and the role of electronic structure 51:26 - Inhibition of corrosion by organic molecules 1:16:18 - Modelling of corrosion inhibition 1:23:50 - Conclusions and references 1:25:57 - Q1: Importance of air-free environment in surface studies 1:27:04 - Q2: Corrosion inhibition in different pH 1:28:20 - Q3: Natural passive layers (at open-circuit potentials) 1:30:07 - Q4: Similarity to a solid electrolyte interphase (SEI) 1:32:22 - Q5: STM of SEI 1:34:14 - Q6: STM of adsorbates on polycrystalline surfaces 1:35:29 - Q7: STM of metal oxides 1:37:02 - Q8: Driving force for deprotonation 1:39:02 - Q9: Kinetics vs thermodynamics (and applicability of DFT) 1:41:56 - Q10: Corrosion and amorphization under OER potentials 1:45:07 - Q12: Driving force for atomic rearrangement of surfaces 1:46:51 - Q13: Role of [SO4]2- in sulfuric acid 1:48:37 - Q14: Electrochemical impedance spectroscopy in corrosion

[@zghelich]

To understand the transition from the crystalline oxide layer to the amorphous oxide layer, one can refer to the Point Defect Model (PDM). The PDM explains the mechanism of metal oxide layer formation, where the amorphous outer layer is formed by the dissolution of the inner barrier layer. In this process, metal ions eject from the inner layer and dissolve into the solution. These dissolved metal ions then precipitate on top of the inner layer due to the hydrolysis of metal ions in the solution, resulting in the formation of an amorphous structure

[@antatolii79]

Hello. Is there a possibility to download the presentation (e.g., as pdf)? I find it v useful to add notes to the slides, but taking snapshots for every interesting slide is not quite productive.