Abstract
The U.S. Department of Energy's Salt Repository Project (SRP) is investigating the general corrosion resistance of cast mild steel as a candidate material for waste package containers. Evaluation of this material is being performed at the Pacific Northwest Laboratory in environments simulating expected repository conditions.
General corrosion studies of mild steel (ASTM A216 grade WCA) in the as-cast and normalized conditions were conducted in hydrothermal halitesaturated (saturated at ambient temperature) brine environments simulating a “dissolution” and an “inclusion” brine. Corrosion tests were also performed in brines similar to the inclusion brine but containing magnesium concentrations ranging from 1000 to 30,000 ppm to investigate the effect of magnesium on the corrosion behavior.
Corrosion rates of the cast mild steel were found to increase with increasing temperature and with increasing magnesium concentration. Some possible mechanisms that explain the observed behavior are presented.
Similar content being viewed by others
References
R.E. Westerman and S.G. Pitman in Scientific Basis for Nuclear Waste Management VIII, edited by C.M. Jantzen, J.A. Stone, and R.C. Ewing (Mater. Res. Soc. Proc. 44, Pittsburgh, PA 1985), pp. 279–285.
R.E. Westerman, J.H. Haberman, S.G. Pitman, and J.S. Perrin in Proceedings of the Joint ASME/ANS Conference on Reactor Materials (American Nuclear Society, July 1986, Philadelphia, PA), pp. 174–179.
G.H. Jenks, Radiolysis and Hydrolysis in Salt-Mine-Brines, ORNL-TM-3717 (Oak Ridge National Laboratory, Oak Ridge, Tennessee, 1972).
J.W. Braithwaite and M.A. Molecke, in Nuclear and Chemical Waste Management (1980), pp. 37–50.
M. Pourbaix, Atlas of Electrochemical Equilibria (Pergamon Press, London, 1964).
F.A. Posey, A.A. Palko, and A.L. Bacarella, Corrosivity of Geothermal Brines, Final Report, ORNL-TM-6308 (Oak Ridge National Laboratory, Oak Ridge, Tennessee, 1978).
H.J. Cleary and N.D. Greene, Corrosion Science 9, 3–13 (1969).
H. Togano, H. Sasaki, Y. Kanda, K. Osato, and H. Nakauchi in Corrosion Behavior of Mild Steel and Low Alloy Steel in Deaerated Hot Sodium Chloride Solutions, Proceedings of the Fifth International Conference on Metallic Corrosion, May 1972, Tokyo, Japan (NACE, Houston, Texas), pp. 807–811.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Haberman, J.H., Frydrych, D.J. Corrosion Studies of A216 Grade WCA Steel in Hydrothermal Magnesium-Containing Brines. MRS Online Proceedings Library 112, 761–772 (1987). https://doi.org/10.1557/PROC-112-761
Published:
Issue Date:
DOI: https://doi.org/10.1557/PROC-112-761