TY - GEN
T1 - Corrosion of iron in physically-constrained locations
AU - Macdonald, Digby Donald
AU - Kursten, Bruno
AU - Engelhardt, George R.
N1 - © The Electrochemical Society.
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PY - 2013
Y1 - 2013
N2 - A model has been developed to calculate the impact of the porous, outer layer of the passive film on the corrosion rate of the carbon steel overpack and on the structural integrity of the concrete in the annulus of the super container of the Belgian High Level Nuclear Waste (HLNW) disposal concept. Because the corrosion product occupies 2 - 6.5 times the volume of the iron from which it forms the development of the outer layer in the confined space between the carbon steel overpack and the concrete will result in the compression of the outer layer and a concomitant decrease in the porosity. If the porosity decreases to a sufficiently low value, the growth of the outer layer ceases and further corrosion is prevented. If the thickness of the corroded layer exceeds a critical value, the concrete will crack, because of the poor strength of cementations materials under tensile loading.
AB - A model has been developed to calculate the impact of the porous, outer layer of the passive film on the corrosion rate of the carbon steel overpack and on the structural integrity of the concrete in the annulus of the super container of the Belgian High Level Nuclear Waste (HLNW) disposal concept. Because the corrosion product occupies 2 - 6.5 times the volume of the iron from which it forms the development of the outer layer in the confined space between the carbon steel overpack and the concrete will result in the compression of the outer layer and a concomitant decrease in the porosity. If the porosity decreases to a sufficiently low value, the growth of the outer layer ceases and further corrosion is prevented. If the thickness of the corroded layer exceeds a critical value, the concrete will crack, because of the poor strength of cementations materials under tensile loading.
KW - Corrosion Prevention
KW - Waste disposal
UR - http://www.scopus.com/inward/record.url?scp=84885783457&partnerID=8YFLogxK
U2 - 10.1149/05031.0457ecst
DO - 10.1149/05031.0457ecst
M3 - In-proceedings paper
AN - SCOPUS:84885783457
SN - 9781607684190
VL - 50
T3 - ECS Transactions
SP - 457
EP - 468
BT - Corrosion, Passivity, and Energy
PB - Electrochemical Society Inc.
T2 - Corrosion, Passivity, and Energy: A Symposium in Honor of Digby D. Macdonald - PRiME 2012
Y2 - 7 October 2012 through 12 October 2012
ER -