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  Prove of hydrogen formation through direct potential measurements in the rolling slit during cold rolling

Merzlikin, S. V., Wildau, M., Steinhoff, K. P., & Hassel, A. W. (2014). Prove of hydrogen formation through direct potential measurements in the rolling slit during cold rolling. Metallurgical Research & Technology, 111(1), 25-35. doi:10.1051/metal/2014005.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-0807-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-BD97-6
Genre: Journal Article

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 Creators:
Merzlikin, Sergiy Vasil´ović1, 2, Author              
Wildau, Monika3, Author              
Steinhoff, Karl Philipp4, Author              
Hassel, Achim Walter2, Author              
Affiliations:
1Corrosion, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2074315              
2Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria, ou_persistent22              
3Ingenieurbüro Dr.-Ing Monika Wildau, Am Kerper Weiher, 41352 Korschenbroich, Germany, ou_persistent22              
4Steinhoff Kaltwalzen GmbH, Gerhard-Malina-Str. 65, Dinslaken, Germany, ou_persistent22              

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Free keywords: Cold rolling; Forged rolls; Friction; Hydrogen; Hydrogen embrittlement; Hydrogen wear; Open circuit potential; Tribo-corrosion
 Abstract: In this work, direct potential measurements during cold rolling of zinc and X20Cr13 stainless steel were carried out in the rolling slit to follow the tribologic and galvanic mechanisms of hydrogen formation and absorption on the surface of the working rolls made of DHQ1 grade steel. An Ag/AgCl in 3.5 M KCl reference microelectrode was used to record the open circuit potential of the electrochemical system roller-product immersed into commercially relevant electrolyte (rolling emulsion) with a pH value of 4.5 and an electric conductivity 46 mS cm(-1). The potential shift into either negative or positive direction of the rolls-product system gives information on the processes taking place at the surface in the course of the friction. A detailed discussion of the in-situ potentiometry experiments reveals a stationary situation established between the destruction and repassivation of the surface structures during continuous cold rolling accompanied with intensive hydrogen evolution. Galvanic coupling of the working rolls with the product significantly intensifies the hydrogen embrittlement related problems of the rolls. Atomic hydrogen is adsorbed on the surface and exhibits a pressure supported absorption into the rolls during their whole lifetime.

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Language(s): eng - English
 Dates: 2013-08-282014-01-232014-04-042014
 Publication Status: Published in print
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000338512900005
DOI: 10.1051/metal/2014005
 Degree: -

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Title: Metallurgical Research & Technology
  Abbreviation : Metall. Res. Tech.
Source Genre: Journal
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Affiliations:
Publ. Info: Cambridge, UK : EDP Sciences
Pages: - Volume / Issue: 111 (1) Sequence Number: - Start / End Page: 25 - 35 Identifier: ISSN: 2271-3646
CoNE: /journals/resource/2271-3646