SCANNING KELVIN PROBE STUDY OF HYDROGEN FORMED DURING ATMOSPHERIC CORROSION

1 RUDOMILOVA Darya
Co-authors:
2 PROŠEK Tomáš 3 SCHIMO-AICHHORN Gabriela 4 TRAXLER Ines 5 MUHR Andreas 6 DUCHACZEK Hubert 7 LUCKENEDER Gerald
Institutions:
1 University of Chemistry and Technology Prague, Prague, Czech Republic, EU, darya.rudomilova@vscht.cz
2 University of Chemistry and Technology Prague, Prague, Czech Republic, EU, tomas.prosek@vscht.cz
3 CEST Competence Center for Electrochemical Surface Technology, Linz, Austria, EU, gabriela.schimo@cest.at
4 CEST Competence Center for Electrochemical Surface Technology, Linz, Austria, EU, ines.traxler@cest.at
5 voestalpine Stahl GmbH, Linz, Austria, EU, Andreas.Muhr@voestalpine.com
6 voestalpine Stahl GmbH, Linz, Austria, EU, Hubert.Duchaczek@voestalpine.com
7 voestalpine Stahl GmbH, Linz, Austria, EU, Gerald.Luckeneder@voestalpine.com
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
587-592
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
64 views / 26 downloads
Abstract

One of the intensively studied issues regarding hydrogen embrittlement of advanced high strength steels (AHSS) is the absorption and diffusion of hydrogen produced by atmospheric corrosion. Scanning Kelvin Probe (SKP) is a tool sensitive enough to detect low amounts of hydrogen formed during atmospheric corrosion. In this work, SKP was used to study the effect of the presence of corrosion products on hydrogen uptake and permeation through AHSSs specimens. Corrosion was initiated on one side of the specimen contaminated with a corrosion activator, while Volta potential mapping on the opposite side allowed for in-situ hydrogen detection. Hydrogen release indicated by low potential areas in the maps corresponded to the locations of corrosion products on the opposite side. This shows that hydrogen entry is linked to the presence of red rust.

Keywords: High strength steels, hydrogen, atmospheric corrosion, SKP
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