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Title: An integrated modeling and experimental approach to study hydrogen pickup mechanism in zirconium alloys

Journal Article · · Corrosion Science
 [1];  [1];  [2];  [3];  [2]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Univ. of Oxford (United Kingdom)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
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Hydrogen pick-up during corrosion of nuclear fuel cladding is a critical life-limiting degradation mechanism in Light Water Reactors. In this study, the oxidation kinetics and hydrogen pickup of a Zr-0.5Nb and an annealed Zr-1.0Nb alloys are being measured during corrosion in pure water autoclave (360 C, 18 MPa). Both the oxidation and hydriding kinetics are successfully reproduced by the Coupled Current Charge Compensation (C4) corrosion model, which now includes proton transport. The nanoscale porosity in the oxides are measured quantitatively by TEM. It is shown that a higher oxide porosity corresponds to a higher proton diffusivity predicted by the C4 model.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1616037
Journal Information:
Corrosion Science, Vol. 159, Issue C; ISSN 0010-938X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (12)

Table 1(p. 2)table Table 1
Figure 1(p. 3)figure Figure 1
Figure 2(p. 4)figure Figure 2
Figure 3(p. 9)figure Figure 3
Figure 4(p. 9)figure Figure 4
Table 2(p. 10)table Table 2
Figure 5(p. 11)figure Figure 5
Figure 6(p. 12)figure Figure 6
Figure 7(p. 14)figure Figure 7
Figure 8(p. 15)figure Figure 8
Figure 9(p. 15)figure Figure 9
Figure A-1(p. 20)figure Figure A-1

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Related Subjects

36 MATERIALS SCIENCE
Corrosion
Oxidation
Porosity
TEM
Zirconium alloys