Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

In Situ Raman Spectroscopic Investigation of Nickel Hydrothermal Corrosion



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


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.
No. 3


aqueous corrosion, corrosion product release, hydrothermal oxidation, in situ optical spectroscopy, nickel, nickel oxide, Raman spectroscopy


Maslar, J. , Hurst, W. , Bowers, W. , Hendricks, J. and Aquino, M. (2002), In Situ Raman Spectroscopic Investigation of Nickel Hydrothermal Corrosion, Corrosion (Accessed June 15, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created March 1, 2002, Updated February 17, 2017