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A mechanistic study of the uniform corrosion of copper in compacted clay-sand soil

Technical Report:

Abstract

The results of a study of the mechanism of uniform corrosion of copper under simulated nuclear fuel waste disposal conditions are presented. Evidence is given that suggests that the rate-controlling process is the transport of copper corrosion products away from the corroding surface. In the experiments described here, the copper diffused through a column of compacted clay-sand buffer. The properties of the buffer material, especially its ability to sorb copper species, are significant in determining the rate of uniform corrosion of copper. The evidence that copper diffusion is rate-controlling stems from the effect of {gamma}-radiation on the tests. In the presence of {gamma}-radiation, copper diffused farther along the column of compacted buffer material than in the unirradiated tests, but the corrosion rate was lower. These two effects can be best explained in terms of a slow copper-diffusion process. Irradiation is thought to reduce the extent of sorption of copper by the clay component of the buffer. This results in a more mobile copper species and a smaller interfacial flux of copper (i.e., a lower corrosion rate).
Publication Date:
Aug 01, 1992
Product Type:
Technical Report
Report Number:
AECL-10397; COG-91-304.
Reference Number:
SCA: 052002; PA: AIX-24:007795; SN: 93000932574
Resource Relation:
Other Information: PBD: Aug 1992
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; COPPER; SOIL-STRUCTURE INTERACTIONS; SPENT FUEL STORAGE; CONTAINERS; CLAYS; CORROSION; GAMMA RADIATION; SAND; SPENT FUELS; 052002; WASTE DISPOSAL AND STORAGE
OSTI ID:
10119199
Research Organizations:
Atomic Energy of Canada Ltd., Pinawa, MB (Canada). Whiteshell Nuclear Research Establishment; Ontario Hydro, Toronto, ON (Canada)
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
Other: ON: DE93612743; TRN: CA9201038007795
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
[141] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Litke, C D, Ryan, S R, and King, F. A mechanistic study of the uniform corrosion of copper in compacted clay-sand soil. Canada: N. p., 1992. Web.
Litke, C D, Ryan, S R, & King, F. A mechanistic study of the uniform corrosion of copper in compacted clay-sand soil. Canada.
Litke, C D, Ryan, S R, and King, F. 1992. "A mechanistic study of the uniform corrosion of copper in compacted clay-sand soil." Canada.
@misc{etde_10119199,
title = {A mechanistic study of the uniform corrosion of copper in compacted clay-sand soil}
author = {Litke, C D, Ryan, S R, and King, F}
abstractNote = {The results of a study of the mechanism of uniform corrosion of copper under simulated nuclear fuel waste disposal conditions are presented. Evidence is given that suggests that the rate-controlling process is the transport of copper corrosion products away from the corroding surface. In the experiments described here, the copper diffused through a column of compacted clay-sand buffer. The properties of the buffer material, especially its ability to sorb copper species, are significant in determining the rate of uniform corrosion of copper. The evidence that copper diffusion is rate-controlling stems from the effect of {gamma}-radiation on the tests. In the presence of {gamma}-radiation, copper diffused farther along the column of compacted buffer material than in the unirradiated tests, but the corrosion rate was lower. These two effects can be best explained in terms of a slow copper-diffusion process. Irradiation is thought to reduce the extent of sorption of copper by the clay component of the buffer. This results in a more mobile copper species and a smaller interfacial flux of copper (i.e., a lower corrosion rate).}
place = {Canada}
year = {1992}
month = {Aug}
}