Passive films, surface structure and stress corrosion and crevice corrosion susceptibility

Abstract

Aluminum , field ion microscopy; iron-chromium alloys ; niobium; repassivation kinetics; stainless steel; triboellipsometry Field ion microscopy studies of the effects of hydrogen interactions with niobium , aluminum , 304 stainless steel and Fe-24% Cr steel were carried out. Both Nb and Al exposed to hydrogen at 80 K and 30 K respectively showed significant surface disarray , but the effects were not deep or crystallographica lly selective . The 304 stainless steel show some indications of crystal-• lographically selective attack. Cathodically charged Fe-24% Cr showed a broad M spectrum of effects .