In situ X-ray diffraction measurement method for investigating the oxides films on austenitic stainless steel in simulated pressurized water reactor primary water

Watanabe, Masashi*; Yonezawa, Toshio*; Shobu, Takahisa; Shoji, Tetsuo*

Synchrotron X-ray diffraction analytical techniques have been used to investigate the structure of oxide films formed on Type 316L (UNS S31603) austenitic stainless steel in simulated pressurized water reactor primary water. The observed layer structures of the oxide films changed depending on the dissolved hydrogen concentration (DH) in PWR primary water. In two cases, where DH = 5 cm $^{3}$ /kg (H $_{2}$ O) or 30 cm $^{3}$ /kg (H $_{2}$ O), a (Ni $_{x}$ Fe( $_{1-x}$ ))Fe $_{2}$ O $_{4}$ -type spinel oxide was observed as the outer oxide, and a FeCr $_{2}$ O $_{4}$ -type spinel oxide was detected as the thin inner oxide. When DH = 30 cm $^{3}$ /kg (H $_{2}$ O), the Fe:Ni ratio in the (Ni $_{x}$ Fe( $_{1-x}$ ))Fe $_{2}$ O $_{4}$ outer spinel oxide was much larger than when DH = 5 cm $^{3}$ /kg (H $_{2}$ O). In addition, sequential in situ measurements when the hydrogen concentration varied from 5 cm $^{3}$ /kg (H $_{2}$ O) to 30 cm $^{3}$ /kg (H $_{2}$ O) also demonstrated that the oxide layer structure seemed to adjust its characteristic composition as a function of the DH.

使用言語	:	English
掲載資料名	:	Corrosion
巻	:	71
号	:	10
ページ数	:	p.1224 - 1236
発行年月	:	2015/10
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キーワード	:	no keyword

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論文URL	:	https://doi.org/10.5006/1690
研究データの公開先DOI	:
使用施設	:	SPring-8(大型放射光施設)
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論文解説記事 (成果普及情報誌)	:
受委託・共同研究相手機関	:	東北大学

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Web of Science® Times Cited Count	:	被引用回数：評価・統計等のため最新の被引用回数を確認したい場合は、直接Web of Science®をご確認ください。 http://www.webofknowledge.com/wos
InCites™	:	パーセンタイル：17.9 分野：Materials Science, Multidisciplinary
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登録番号 : AA20150732
抄録集掲載番号 : 47000364
論文投稿番号 : 21036

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