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Potentiodynamic Polarization Studies of Candidate Container Materials in Simulated Tuff Repository Environments

Published online by Cambridge University Press:  21 February 2011

John A. Beavers ,
Neil G. Thompson  and
William V. Harper
John A. Beavers
Affiliation:
Cortest Columbus Incorporated 2704 Sawbury Boulevard, Columbus, OH 43235
Neil G. Thompson
Affiliation:
Cortest Columbus Incorporated 2704 Sawbury Boulevard, Columbus, OH 43235
William V. Harper
Affiliation:
Resource International 281 Enterprise Drive, Westerville, OH 43081
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Abstract

Cortest Columbus is investigating the long-term performance of container materials used for high-level waste packages as part of the information needed by the Nuclear Regulatory Commission to assess the Department of Energy's application to construct a geologic repository for high-level radioactive waste. In one task of the program, a cyclic potentiodynamic polarization (CPP) technique was used to evaluate the corrosion behavior of the candidate container materials. In order to evaluate the expected range of environmental variables, a statistical experimental design approach was used. A Resolution IV experimental design for 15 variables was selected. The variables included temperature, pH, species present in the groundwater, and those generated by radiolysis. Complete matrices of CPP tests, which consist of tests in 33 environments, were performed on two candidate container materials; Type 304L Stainless Steel and Incoloy Alloy 825. In these tests, both alloys exhibited a wide range of behavior; including passive behavior, pitting and active corrosion. For each alloy, the environmental variables that affected corrosion behavior were identified.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 176: Symposium U – Scientific Basis for Nuclear Waste Management XIII , 1989 , 533
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

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