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

Published

January 1, 2009

Author(s)

James E. Maslar, Wilbur S. Hurst, Walter J. Bowers Jr., Jay H. Hendricks

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

Pub Type

Journals

Keywords

alloy 600, aqueous corrosion, corrosion product release, hydrothermal oxidation, in situ Raman spectroscopy, NiFe2O4

Citation

Maslar, J. , Hurst, W. , Bowers, W. and Hendricks, J. (2009), Alloy 600 Aqueous Corrosion at Elevated Temperatures and Pressures: An in situ Raman Spectroscopic Investigation, Journal of Nuclear Materials (Accessed April 16, 2024)