検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

金属イオン含有硝酸中のステンレス鋼腐食の温度依存性

Study on temperature dependence of corrosion of stainless steel in the metal ion containing nitric acid

上野 文義  ; 入澤 恵理子 ; 阿部 仁 

Ueno, Fumiyoshi; Irisawa, Eriko; Abe, Hitoshi

ステンレス鋼製の再処理機器では、核燃料由来の高酸化性金属イオンを含む沸騰硝酸溶液中で粒界腐食が進展する。本研究では、この環境における腐食進展機構を明らかにすることを目的に、5価のバナジウムを添加した3M硝酸溶液を用い、ステンレス鋼の腐食速度の温度依存性について検討した。沸騰曲線を用いて推定した接液面温度を用いて伝熱面条件の腐食速度の温度依存性を調べた結果、浸漬条件と一致したことから、腐食速度に及ぼす熱流束の効果は見られないことがわかった。また、腐食速度の温度依存性を調べた結果、約378K以上の沸騰条件とそれ以下の非沸騰条件では活性化エネルギーが異なることがわかった。

The reprocessing components made of stainless steel appear intergranular corrosion in boiling nitric acid solution containing high oxidizing metal ions derived from spent nuclear fuel. In this paper, to clarify the corrosion mechanism in this environment, temperature dependence of corrosion rate of a stainless steel in boiling 3 molar nitric acid with added pentavalent vanadium was studied. As the results of investigation of the temperature dependence of the corrosion rate of the heat transfer surface using estimated temperature from a boiling curve, it was found that there was no effect of heat flux on corrosion rate because the dependence was consistent between heat transfer condition and non-heat-transfer. Also it was found that the activation energy was different between the boiling conditions of about 378 K or more and the non-boiling conditions of below 378 K.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.