Measurement of crevice environment using sensor and the effect of geometrical factors

Soma, Yasutaka   ; Kato, Chiaki   ; Ueno, Fumiyoshi  ; Aoki, So  ; Inagaki, Hiromitsu*

Crevice environment was measured by electrochemical sensors in high temperature pure water. Crevice environment and surface oxide layer on the crevice surface was analyzed in terms of crevice's geometrical factors (crevice gap, g and depth, d). The results were plotted on the g-d plane. It was shown that electrical conductivity of crevice solution was very high in oxygen depleted zone and the zone shrinked with increasing crevice gap, g.