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Evaporation of Cr2O3 in Atmospheres Containing H2O

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タイトル: Evaporation of Cr2O3 in Atmospheres Containing H2O
著者: Yamauchi, Akira 著作を一覧する
Kurokawa, Kazuya 著作を一覧する
Takahashi, Hideaki 著作を一覧する
キーワード: High temperature oxidation
H2O-Containing atmosphere
Evaporation of Cr2O3
Deterioration of Cr2O3 scale
発行日: 2003年 6月
出版者: Springer
誌名: Oxidation of Metals
巻: 59
号: 5/6
開始ページ: 517
終了ページ: 527
出版社 DOI: 10.1023/A:1023671206976
抄録: Stainless steels in atmospheres containing H2O form a Cr2O3 scale in the early stage of oxidation. However, the Cr2O3 scale gradually degrades with time. In order to determine the effect of H2O on the deterioration of a Cr2O3 scale, evaporation behavior of Cr2O3 in N2-O2-H2O atmospheres was investigated. The rate of mass loss in a N2-O2-H2O atmosphere was found to be one order of magnitude higher than the rates in N2-O2 and N2-H2O atmospheres, indicating that deterioration of the Cr2O3 scale is likely to occur in mixed atmospheres of oxygen and water vapor. Volatilization of Cr2O3 is probably based on the following reactions: 1/2 Cr2O3(s)+ 3/4 O2(g)+ H2O(g)= CrO2(OH)2(g). However, it was also speculated that the reaction, Cr2O3(s)+ 3/2 O2(g)= 2 CrO3(g), affects the evaporation of Cr2O3 at temperatures higher than 1323 K. The evaporation rate of Cr2O3 is roughly comparable to the growth rate of the Cr2O3 scale. Therefore, a Cr2O3 scale can be degraded by the evaporation of Cr2O3.
Rights: The original publication is available at
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 山内 啓


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