Regensburg 2019 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 12: Poster session I
MM 12.25: Poster
Montag, 1. April 2019, 19:15–20:45, Poster C
Hydrogen detection in high strength steels with Scanning Kelvin Probe Force Microscopy — •Ines Traxler1,2, Gabriela Schimo-Aichhorn1, Andreas Muhr3, Gerald Luckeneder3, Hubert Duchaczek3, Karl-Heinz Stellnberger3, Josef Faderl3, Darya Rudomilova4, Tomáš Prošek4, and Sabine Hild1,2 — 1CEST Competence Center for Electrochemical Surface Technology, Viktor-Kaplan Str. 2, 2700 Wr. Neustadt and Stahlstr. 2-4, 4031 Linz, Austria — 2Institute of Polymer Science, Johannes Kepler University, Altenbergerstr. 69, 4040 Linz, Austria — 3voestalpine Stahl GmbH, voestalpine-Str. 3, 4020 Linz, Austria — 4UCT Prague, Zizkova 7, 27801 Kralupy, Czech Republic
Hydrogen embrittlement is a big problem in the automotive industry, as even small amounts of hydrogen have detrimental effects on steel properties. Scanning Kelvin Probe Force Microscopy (SKPFM) is a hopeful technique for the investigation of hydrogen in steel and the visualization in the individual steel phases with a very good spatial resolution. The impact of hydrogen diffusion on zinc coated high strength steels was investigated using SKPFM. Also, the hydrogen insertion at cut edges and coating defects was studied. To induce corrosion and to promote hydrogen entry into steel, various salt solutions were applied on the backside of uncoated and zinc coated dual phase steels. The hydrogen inserted into the sample is subsequently permeating through the steel until it reaches the other sample side,where the effect on the contact potential difference (CPD) and therefore the hydrogen permeation is monitored with SKPFM.