English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Corrosion of high-level radioactive waste iron-canisters in contact with bentonite

Kaufhold, S., Hassel, A. W., Sanders, D., & Dohrmann, R. (2015). Corrosion of high-level radioactive waste iron-canisters in contact with bentonite. Journal of Hazardous Materials, 285, 464-473. doi:10.1016/j.jhazmat.2014.10.056.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-54BA-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-54BB-0
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Kaufhold, Stephan1, Author              
Hassel, Achim Walter2, 3, Author              
Sanders, Daniel3, Author              
Dohrmann, Reiner1, 4, Author              
Affiliations:
1BGR, Bundesanstalt für Geowissenschaften und Rohstoffe, Stilleweg 2, Hannover, Germany, ou_persistent22              
2Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria , ou_persistent22              
3Electrochemistry and Corrosion, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863355              
4LBEG, Landesamt für Bergbau, Energie und Geologie, Stilleweg 2, Hannover, Germany, ou_persistent22              

Content

show
hide
Free keywords: Corrosion; Corrosion inhibitors; Iron; Radioactive wastes; Radioactivity; Silicates Compacted bentonite; Corrosion products; High level radioactive wastes; Iron pellets; Layer charge density; Solid/liquid ratios; Steel canisters; Swelling clay
 Abstract: Several countries favor the encapsulation of high-level radioactive waste (HLRW) in iron or steel canisters surrounded by highly compacted bentonite. In the present study the corrosion of iron in contact with different bentonites was investigated. The corrosion product was a 1:1 Fe layer silicate already described in literature (sometimes referred to as berthierine). Seven exposition test series (60 degrees C, 5 months) showed slightly less corrosion for the Na-bentonites compared to the Ca-bentonites. Two independent exposition tests with iron pellets and 38 different bentonites clearly proved the role of the layer charge density of the swelling clay minerals (smectites). Bentonites with high charged smectites are less corrosive than bentonites dominated by low charged ones. The type of counterion is additionally important because it determines the density of the gel and hence the solid/liquid ratio at the contact to the canister. The present study proves that the integrity of the multibarrier-system is seriously affected by the choice of the bentonite buffer encasing the metal canisters in most of the concepts. In some tests the formation of a patina was observed consisting of Fe-silicate. Up to now it is not clear why and how the patina formed. It, however, may be relevant as a corrosion inhibitor. (C) 2014 Elsevier B.V. All rights reserved.

Details

show
hide
Language(s): eng - English
 Dates: 2015-03-01
 Publication Status: Published in print
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Hazardous Materials
  Other : J. Hazard. Mater.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 285 Sequence Number: - Start / End Page: 464 - 473 Identifier: ISSN: 0304-3894
CoNE: /journals/resource/954925512447