Simultaneous In Situ Imaging of pH and Surface Roughening during the Progress of Crevice Corrosion of Stainless Steel

Ko Ichiro Miyamoto, Rinya Hiramitsu, Carl Frederik Werner, Tatsuo Yoshinobu

研究成果: ジャーナルへの寄稿学術論文査読

7 被引用数 (Scopus)

抄録

Stainless steel plays an important role in industry due to its anti-corrosion characteristic. It is known, however, that local corrosion can damage stainless steel under certain conditions. In this study, we developed a novel measurement system to observe crevice corrosion, which is a local corrosion that occurs inside a narrow gap. In addition to pH imaging inside the crevice, another imaging technique using an infrared light was combined to simultaneously visualize surface roughening of the test piece. According to experimental results, the lowering of local pH propagated inside the crevice, and after that, the surface roughening started and expanded due to propagation of corrosion. The real-time measurement of the pH distribution and the surface roughness can be a powerful tool to investigate the crevice corrosion.

本文言語英語
論文番号2246
ジャーナルSensors
22
6
DOI
出版ステータス出版済み - 2022 3月 1

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