TDS Measurement of Hydrogen Released from Stainless Steel Oxidized in H₂O-Containing Atmospheres

Abstract:

Hydrogen dissolved in the Cr2O3 scale formed on the stainless steel in the H2O-containing atmospheres is observed by TDS (thermal desorption spectroscopy) measurements. The amount of dissolved hydrogen in the Cr2O3 scale reaches a maximum about 0.32 mol% when the H2O concentration in the gas reaches 20%. It was found from GDS (glow discharge spectroscopy) measurements that hydrogen may exist at the oxide scale / substrate interface or in Cr2O3 scale bounded that interface. However, results from the Vickers hardness and the observation of scale morphology by SEM (scanning electron microscopy), hydrogen dissolved in the Cr2O3 scale would have little effect on a decrease in the mechanical property of the Cr2O3 scale. Therefore, hydrogen dissolved in the Cr2O3 scale may not be main factor of the deterioration of the Cr2O3 scale.

• Periodical: Materials Science Forum (Volumes 522-523)
• Pages: 163-170
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.522-523.163
• Online since: August 2006
• Authors: Akira Yamauchi, Yuji Yamauchi, Yuko Hirohata, Tomoaki Hino, Kazuya Kurokawa
• Keywords: Cr₂O₃ Scales, H₂O Vapor, Hydrogen, Oxidation, Thermal Desorption Spectroscopy (TDS)

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