Posner, R.; Fink, N.; Giza, G.; Grundmeier, G.: Corrosive delamination and ion transport along stretch-formed thin conversion films on galvanized steel. Surface and Coatings Technology 253, pp. 227 - 233 (2014)
Sarfraz, A.; Posner, R.; Lange, M. M.; Lill, K. A.; Erbe, A.: Role of intermetallics and copper in the deposition of ZrO2-based conversion coatings on AA6014. Journal of the Electrochemical Society 161 (12), pp. C509 - C516 (2014)
Posner, R.; Fink, N.; Wolpers, M.; Grundmeier, G.: Electrochemical electrolyte spreading studies of the protective properties of ultra-thin films on zinc galvanized steel. Surface and Coatings Technology 228, pp. 286 - 295 (2013)
Posner, R.; Jubb, A. M.; Frankel, G. S.; Stratmann, M.; Allen, H. C.: Simultaneous in-situ Kelvin Probe and Raman spectroscopy analysis of electrode potentials and molecular structures at polymer covered salt layers on steel. Electrochimica Acta 83, pp. 327 - 334 (2012)
Posner, R.; Sundell, P. E.; Bergman, T.; Roose, P.; Heylen, M.; Grundmeier, G.; Keil, P.: UV-Curable Polyester Acrylate Coatings: Barrier Properties and Ion Transport Kinetics Along Polymer/Metal Interfaces. Journal of the Electrochemical Society 158 (6), pp. C185 - C193 (2011)
Posner, R.; Santa, M.; Grundmeier, G.: Wet- and Corrosive De-Adhesion Processes of Water-Borne Epoxy Film Coated Steel I. Interface Potentials and Characteristics of Ion Transport Processes. Journal of the Electrochemical Society 158 (3), pp. C29 - C35 (2011)
Santa, M.; Posner, R.; Grundmeier, G.: Wet- and Corrosive De-Adhesion Processes of Water-Borne Epoxy Film Coated Steel II. The Influence of -Glycidoxypropyltrimethoxysilane as an Adhesion Promoting Additive. Journal of the Electrochemical Society 158 (3), pp. C36 - C41 (2011)
Grundmeier, G.; Posner, R.: Disbonding processes at polymer-metal interfaces: From a molecular-level understanding to self-healing processes. Galvanotechnik 101 (6), pp. 1253 - 1255 (2010)
Posner, R.; Giza, G.; Marazita, M.; Grundmeier, G.: Ion transport processes at polymer/oxide/metal interfaces under varying corrosive conditions. Corrosion Science 52 (5), pp. 1838 - 1846 (2010)
Posner, R.; Marazita, M.; Amthor, S.; Roschmann, K. J.; Grundmeier, G.: Influence of interface chemistry and network density on interfacial ion transport kinetics for styrene/acrylate copolymer coated zinc and iron substrates. Corrosion Science 52 (3), pp. 754 - 760 (2010)
Posner, R.; Wapner, K.; Amthor, S.; Roschmann, K. J.; Grundmeier, G.: Electrochemical investigation of the coating/substrate interface stability for styrene/acrylate copolymer films applied on iron. Corrosion Science 52 (1), pp. 37 - 44 (2010)
Santa, M.; Posner, R.; Grundmeier, G.: In-situ study of the deterioration of thiazole/gold and thiazole/silver interfaces during interfacial ion transport processes. Journal of Electroanalytical Chemistry 643 (1-2), pp. 94 - 101 (2010)
Posner, R.; Titz, T.; Wapner, K.; Stratmann, M.; Grundmeier, G.: Transport processes of hydrated ions at polymer/oxide/metal interfaces. Part 2: Transport on oxide covered iron and zinc surfaces. Electrochimica Acta 54 (33), pp. 900 - 908 (2009)
Posner, R.; Wapner, K.; Stratmann, M.; Grundmeier, G.: Transport processes of hydrated ions on oxide covered iron and zinc surfaces and interfaces. Part 1: Transport at polymer/oxide/metal interfaces. Electrochimica Acta 54 (3), pp. 891 - 899 (2009)
Wielant, J.; Posner, R.; Grundmeier, G.; Terryn, H.: Interface dipoles observed after adsorption of model compounds on iron oxide films: Effect of organic functionality and oxide surface chemistry. Journal of Physical Chemistry C 112, pp. 12951 - 12957 (2008)
Hydrogen in aluminium can cause embrittlement and critical failure. However, the behaviour of hydrogen in aluminium was not yet understood. Scientists at the Max-Planck-Institut für Eisenforschung were able to locate hydrogen inside aluminium’s microstructure and designed strategies to trap the hydrogen atoms inside the microstructure. This can…
Hydrogen embrittlement (HE) of steel is a great challenge in engineering applications. However, the HE mechanisms are not fully understood. Conventional studies of HE are mostly based on post mortem observations of the microstructure evolution and those results can be misleading due to intermediate H diffusion. Therefore, experiments with a…
Smaller is stronger” is well known in micromechanics, but the properties far from the quasi-static regime and the nominal temperatures remain unexplored. This research will bridge this gap on how materials behave under the extreme conditions of strain rate and temperature, to enhance fundamental understanding of their deformation mechanisms. The…
“Smaller is stronger” is well known in micromechanics, but the properties far from the quasi-static regime and the nominal temperatures remain unexplored. This research will bridge this gap on how materials behave under the extreme conditions of strain rate and temperature, to enhance fundamental understanding of their deformation mechanisms. The…
In this project we investigate the hydrogen distribution and desorption behavior in an electrochemically hydrogen-charged binary Ni-Nb model alloy. The aim is to study the role of the delta phase in hydrogen embrittlement of the Ni-base alloy 718.
We plan to investigate the rate-dependent tensile properties of 2D materials such as metal thin films and PbMoO4 (PMO) films by using a combination of a novel plan-view FIB based sample lift out method and a MEMS based in situ tensile testing platform inside a TEM.
Biological materials in nature have a lot to teach us when in comes to creating tough bio-inspired designs. This project aims to explore the unknown impact mitigation mechanisms of the muskox head (ovibus moschatus) at several length scales and use this gained knowledge to develop a novel mesoscale (10 µm to 1000 µm) metamaterial that can mimic the…
Microbiologically influenced corrosion (MIC) of iron by marine sulfate reducing bacteria (SRB) is studied electrochemically and surfaces of corroded samples have been investigated in a long-term project.