ステンレス鋼のEMI-TFSIイオン液体中での繰り返し分極に伴う不働態皮膜の変化挙動

河野, 明訓; 益田, 尚吾; 斎藤, 実 他

材料と環境, 2016, 65(12), 520-526

Number of Access:1,202（2025-08-14 15:05 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/82363

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Title
ステンレス鋼のEMI-TFSIイオン液体中での繰り返し分極に伴う不働態皮膜の変化挙動
Structural Changes of Passive Films during Cyclic Polarization of Stainless Steels in EMI-TFSI Ionic Liquid
Creator
CreatorName
河野, 明訓 ; Kawano, Akinori
CreatorName
益田, 尚吾 ; Masuda, Shogo
CreatorName
斎藤, 実 ; Saito, Minoru
NRID
1000050432513 1000050432513
ORCID
0000-0001-5619-0139 0000-0001-5619-0139
researchmap permalink
read0076368 read0076368
Scopus Author ID
7202203364 7202203364
CreatorName
土谷, 博昭 ; Tsuchiya, Hiroaki
NRID
1000070199371 1000070199371
ORCID
0000-0002-7787-4190 0000-0002-7787-4190
researchmap permalink
read0013980 read0013980
Scopus Author ID
57211614674 57211614674
CreatorName
藤本, 愼司 ; Fujimoto, Shinji
Subject
不働態
EELS
AES
STEM
室温イオン液体
Cr濃縮
CV
SUS304
SUS430
passivity
room temperature ionic liquid
Cr enrichment
Abstract
含水率5.5 ppm, 30 ppm, 5000 ppmに制御した室温のEMI-TFSIイオン液体中でSUS304とSUS430LXのCVを行った．CV中に変化した皮膜をAESならびにTEM/EELSで解析した．CV後の不働態皮膜は，水溶液中で形成された皮膜と同様に主としてCrおよびFeの酸化物で構成されていた．CVサイクル数の増加に伴い，膜厚と皮膜中のCrカチオン分率が増大した．さらに，EMI-TFSI中の含水率が低いほど，よりCrが濃化し，より薄い皮膜を形成する傾向が認められた．これらの結果から，SUS304とSUS430LXは低含水率のEMI-TFSI中で耐食性を有すると考えられる．
SUS304 and SUS430LX stainless steels were subjected to cyclic voltammetry (CV) in EMI-TFSI ionic liquid containing water of 5.5, 30 and 5000 ppm at room temperature. Structural changes of passive film during CV was characterized by AES and TEM/EELS. Passive films after CV were mainly composed of mainly Cr and Fe oxides similar to that formed in aqueous solutions. The thickness and Cr cation fraction of passive film increased with increasing CV cycles. Furthermore, much Cr concentrated and thinner passive films were formed with less water content in EMI-TFSI. It is concluded that SUS304 and SUS430LX stainless steel are corrosion resistant in EMI-TFSI ionic liquid with small amount of water.
Publisher
腐食防食学会
Japan Society of Corrosion Engineering
Source Title
材料と環境
Volume (Issue)
65(12)
Page
520-526
Date of Issued
2016-12-15
Language
Japanese
Handle URL
https://hdl.handle.net/11094/82363
PISSN
09170480
eISSN
18819664
NCID
AN10235427
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.3323/jcorr.65.520
Access Rights
open access
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article