Hostname: page-component-848d4c4894-ttngx Total loading time: 0 Render date: 2024-06-09T10:59:11.825Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effects of Carbonate-Bicarbonate Concentration on Empirical Corrosion Diagram of Mild Steel as a Material of Geological Disposal Package for High Level Nuclear Wastes

Published online by Cambridge University Press:  10 February 2011

Guen Nakayama ,
Yuichi Fukaya  and
Masatsune Akashi
Guen Nakayama
Affiliation:
Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd. 3–1–15 Toyosu, Koto-ku Tokyo 135Japan, guen@rimat.ty.ihi.co.jp
Yuichi Fukaya
Affiliation:
Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd. 3–1–15 Toyosu, Koto-ku Tokyo 135Japan, guen@rimat.ty.ihi.co.jp
Masatsune Akashi
Affiliation:
Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd. 3–1–15 Toyosu, Koto-ku Tokyo 135Japan, guen@rimat.ty.ihi.co.jp
Get access

Abstract

In the scheme for geological disposal of high level radioactive nuclear wastes, the burial pit is to be isolated from the sphere of human life by a multiple-barrier system, which consists of an artificial barrier, composed of a canister, an overpack and a bentonite cushioning layer, and a natural barrier, which is essentially the bedrock. As the greatest as well as essentially the sole detriment to its integrity would be corrosion by groundwater. The groundwater comes to it seeping through the bentonite zone, thereby attaining conceivably the pH of transition from general corrosion to passivity, pHd, the behaviors of mild steel in such a groundwater environment have been examined. It has been shown that the pHd is lowered (enlargement of the passivity domain) with rising temperature and carbonate-bicarbonate concentration, while it is raised (enlargement of the general corrosion region) with increasing concentrations of chloride and sulfate ions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 451: Symposium P – Electrochemical Synthesis and Modification , 1996 , 567
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

(1) Disposal of Radioactive Waste: Review of Safety Assessment Method, OECD/NEA, p. 19 (1991).Google Scholar
(2) Parkins, R.N.; Corrosion Science, 20, 147 (1980).Google Scholar
(3) Kasahara, K. and Adachi, H., Tetsu-to-Hagané, 69 (1983) 100.Google Scholar
(4) Nakayama, G. and Akashi, M., Mat. Res. Soc. Symp. Proc, Vol. 294 (1992).Google Scholar
(5) Fukuda, T. and Staehle, R., Preprints to 39th Lecture Meeting on Corrosion and Corrosion Prevention, JSCE (1993).Google Scholar