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Elemental depth imaging of solutions for monitoring corrosion process of steel sheet by confocal micro X‐ray fluorescence
Author(s) -
Hirano S.,
Akioka K.,
Doi T.,
Arai M.,
Tsuji K.
Publication year - 2014
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.2542
Subject(s) - corrosion , carbon steel , materials science , seawater , elemental analysis , confocal , fluorescence , x ray fluorescence , metallurgy , analytical chemistry (journal) , chemistry , optics , inorganic chemistry , oceanography , physics , chromatography , geology
Non‐destructive and non‐contact analysis has been in demand on numerous occasions. Confocal micro X‐ray fluorescence analysis enables depth‐selective elemental analysis of solid samples in the laboratory. In this paper, we applied this technique for imaging elemental distributions in solutions. A low‐carbon steel sheet was placed in artificial seawater (NaCl: 3.5 mass%), and the corrosion process in the solution was observed. A depth image of Fe Kα intensity in the NaCl solution was obtained by using this technique. The Fe Kα intensity in the solution was measured with corrosion time by sequential line analysis at a fixed lateral position. The corrosion of Fe from the steel sheet, the migration of Fe ions in solution, and their condensation near a polymer window were successfully monitored. Copyright © 2014 John Wiley & Sons, Ltd.