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Report No.
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Development of in-situ observation and testing method for corrosion behaviors of various metals in fluid flow condition

Ambai, Hiromu ; Sano, Yuichi  ; Kato, Toshihiro

Corrosion behaviors in fluid flow condition can be different from those in static condition. Also it is noted that corrosion rates make a big change by nitric acid flow in nuclear fuel reprocessing plants. Until now, long term immersion tests in fluid flow condition which need coupons removing were conducted and thus a method which can test in a shorter time is required. In this study, we used scanning electrochemical measurement system which can measure corrosion potentials of material surfaces etc. and tried in-situ observations of effects on electrochemical properties from solution composition and flow rate in high concentration nitric acid flow condition. Furthermore, we considered a testing method to predict corrosion behaviors from same data and corrosion wastage data.

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