In situ XANES studies of the passive film on Fe and Fe-26Cr

Conference · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6569879

Davenport, A J; Isaacs, H S ^[1]; Bardwell, J A ^[2]; MacDougall, B ^[3]

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1. Brookhaven National Lab., Upton, NY (United States)
2. National Research Council of Canada, Ottawa, ON (Canada). Inst. for Microstructural Sciences
3. National Research Council of Canada, Ottawa, ON (Canada). Inst. for Environmental Chemistry

In situ x-ray absorption near edge structure (XANES) has been used to study the passive film on iron and Fe-26Cr thin films under potential control in borate buffer. The technique enables information on both valence state and the amount of material lost through dissolution to be determined. The passive films on both Fe and Fe-Cr are formed with negligible dissolution. On reduction, iron is lost from both films due to reductive dissolution. In the case of Fe, it has been determined that some of the iron in the film is reduced back to-the-metallic state. Concurrent monitoring of the Fe and Cr edges has shown that in the case of Fe-Cr, loss of iron leads to enrichment of Cr in the film.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6569879
• Report Number(s): BNL-48620; CONF-930271--2; ON: DE93010869
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ABSORPTION SPECTROSCOPY
ALLOYS
CHROMIUM ALLOYS
ELEMENTS
IRON
IRON ALLOYS
IRON BASE ALLOYS
METALS
PASSIVATION
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENTS
X-RAY SPECTRA
X-RAY SPECTROSCOPY