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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|
|Pages:||pp. C103 - C113|
|Keywords:||alloy 600,aqueous corrosion,corrosion product release,hydrothermal oxidation,in situ Raman spectroscopy,NiFe2O4|
|Research Areas:||Materials performance, Raman|