Effects of hydrogen peroxide on corrosion of stainless steel, 5; Characterization of oxide film with multilateral surface analyses

Miyazawa, Takahiro*; Terachi, Takumi*; Uchida, Shunsuke*; Sato, Tomonori ; Tsukada, Takashi ; Sato, Yoshiyuki*; Wada, Yoichi*; Hosokawa, Hideyuki*

In order to understand corrosion behavior of stainless steel in BWR reactor water conditions, characteristics of oxide films on stainless steel specimens exposed to H $_{2}$ O $_{2}$ and O $_{2}$ in high temperature water were determined by multilateral surface analyses. The following points were experimentally confirmed. (1) Oxide layers were divided into inner and outer layers: Outer layers of the specimen exposed to 100ppb H $_{2}$ O $_{2}$ consisted of larger corundum type hematite particles, while inner layersconsisted of very fine Ni rich spinel type magnetite. (2) Outer oxide layers consisted of oxide particles, whose density and size were changed by oxidant concentration. The average diameter decreased with [O $_{2}$ ] and [H $_{2}$ O $_{2}$ ]. (3) A larger dissolution rate at higher [H $_{2}$ O $_{2}$ ] resulted in a thinner oxide film with smaller particles.

Language	:	English
Journal	:	Journal of Nuclear Science and Technology
Volume	:	43
Number	:	8
Pages	:	p.884 - 895
Publication Year/Month	:	2006/08
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Paper URL	:	https://doi.org/10.3327/jnst.43.884
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Keywords	:	no keyword
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Registration No. : AA20060523
JAEA Abstracts No. :
Paper Submission No. : 7213

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