Metallic Waste Forms

Ebert, W. L.

doi:10.1016/b978-0-08-056033-5.00109-9

Cited by 1 publication

(1 citation statement)

References 27 publications

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“…The corrosion behaviour of a metallic waste form within a disposal facility will be sensitive to the redox strengths (solution Eh), pH, and chloride contents of seepage waters filling breached waste packages. Electrochemical corrosion methods are being used to identify the material and environmental variables affecting the degradation rates of multi-phase metallic and cermet waste forms and quantify the dependencies on the alloy composition and environmental variables [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Corrosion rates measured under potentiostatic conditions to represent performance of a cermet nuclear waste form

Gattu,

Ebert,

Indacochea

2023

Corrosion Engineering, Science and Technology: The Internationa

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Electrochemical tests were conducted to assess the corrosion performance of a developmental multiphase cermet nuclear waste form in different conditions. Corrosion currents were monitored as the surface equilibrated in an acidic brine solution during potentiostatic tests at different imposed potentials. Electrochemical impedance spectroscopy was used to quantify differences in the electrical properties of surfaces stabilised at different potentials. The passivating oxides that will stabilise the surface under disposal conditions are formed and maintained during testing. The measured corrosion currents were two orders of magnitude lower for passivated surfaces than for polished surfaces over a wide range of redox conditions. The electrochemical results were correlated with microscopic analyses of the corroded surfaces and physical models of the surface passivation and degradation processes are proposed. The measured corrosion rates are suitable for the long-term performance modeling of cermet nuclear waste forms.

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Section: Introductionmentioning

confidence: 99%