Maslar, J.
, Hurst, W.
, Bowers, W.
, Hendricks, J.
and Aquino, M.
(2002),
In Situ Raman Spectroscopic Investigation of Nickel Hydrothermal Corrosion, Corrosion (Accessed October 25, 2026)
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In Situ Raman Spectroscopic Investigation of Nickel Hydrothermal Corrosion
Published
Author(s)
, , , , M I. Aquino
Abstract
A nickel coupon was exposed to air-saturated water at a pressure of 25.4 MPa and temperatures ranging from 21 C to 460 C in an optically accessible flow cell. In situ Raman spectra were collected at a number of temperatures as the coupon was heated and then cooled. The coupon also was characterized ex situ with Raman spectroscopy, scanning electron microscopy, energy dispersive X-ray spectrometry, and X-ray diffraction. Corrosion species were observed in situ at temperatures above 249 C during heating and under all conditions during cooling. The species were identified as NiO and α-CrOOH. The α-CrOOH originated as a corrosion product released from the optical cell and/or flow system. The NiO Raman features are more intense during cooling than at the corresponding temperatures during heating, indicating that NiO is present in greater amounts and/or is more crystalline during cooling.Citation
Corrosion
Volume
58
Issue
No. 3
Pub Type
Journals
Keywords
aqueous corrosion, corrosion product release, hydrothermal oxidation, in situ optical spectroscopy, nickel, nickel oxide, Raman spectroscopy
Citation
Issues
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Created March 1, 2002, Updated February 17, 2017