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Publication Citation: Alloy 600 Aqueous Corrosion at Elevated Temperatures and Pressures: An in situ Raman Spectroscopic Investigation

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Author(s): James E. Maslar; Wilbur S. Hurst; Walter J. Bowers Jr.; Jay H. Hendricks;
Title: Alloy 600 Aqueous Corrosion at Elevated Temperatures and Pressures: An in situ Raman Spectroscopic Investigation
Published: January 01, 2009
Abstract: Alloy 600 coupons were exposed to air-saturated water at pressures of 15.65 MPa and 25.4 MPa and temperatures ranging from 21 C to 543 C in an optically accessible flow cell. In situ Raman spectra were collected at a number of temperatures, as the metal coupons were heated and then cooled. The coupons also were characterized ex situ with Raman spectroscopy and scanning electron microscopy. A NiFe2O4 phase was identified on both coupon surfaces while α-CrOOH and Cr2O3 phases were identified on only one. The hydrothermal corrosion of one alloy 600 coupon and a 304L stainless steel coupon were compared. It was observed that the extent of formation and/or degree of crystallinity of both the NiFe2O4 and α-CrOOH phases were lower on the alloy 600 coupon than on the 304L stainless steel coupon.
Citation: Journal of Nuclear Materials
Volume: 156
Issue: 3
Pages: pp. C103 - C113
Keywords: alloy 600;aqueous corrosion;corrosion product release;hydrothermal oxidation;in situ Raman spectroscopy;NiFe2O4
Research Areas: Materials performance, Raman