The use of x-ray techniques in the in situ study of corrosion [electronic resource].

Published: Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: 16 pages : digital, PDF file
Additional Creators: Brookhaven National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

Applications of x-ray absorption and fluorescence techniques for in situ chemistry studies of passivity and localized corrosion have been described. X-ray absorption near edge structures showed that rapidly grown oxides on aluminum-chromium alloys incorporated chromium in the oxide. Repeated electrochemically induced changes between the chromium 3- and 6-valent state occurred without chromium dissolving. When the oxide was grown by small potential steps, the chromium dissolved when 6-valent chromate was formed. With iron-chromium alloys, dissolution of chromate took place but 6-valent chromium was also incorporated in the oxide. The 6-valent state was reduced on exposing the iron alloy to air. X-ray fluorescence measurements, in conjunction with energy dispersive analysis, have been used to monitor iron, chromium and nickel concentrations in solution. The concentrations and concentration gradients during localized corrosion of stainless steel were used to determine salt solubility and relative diffusion rates.

Report Numbers

E 1.99:bnl--49361
E 1.99: conf-921277--2
conf-921277--2
bnl--49361

Subject(s)

Materials Science

Other Subject(s)

Note

Published through SciTech Connect.
12/31/1992.
"bnl--49361"
" conf-921277--2"
"DE93019845"
NATO advanced research workshop,Maderia (Portugal),19 Dec 1992.
Isaacs, H.S.

Funding Information

AC02-76CH00016

View MARC record | catkey: 14456381