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Electrochemical Corrosion Testing of Neutron Absorber Materials (October 2006).

DE2008911717

Publication Date	2006
Personal Author	Lister, T.; Mizia, R.; Birk, S.; Matteson, B.; Tian, H.
Page Count	28
Abstract	Reactions that lead to the formation of mineral precipitates, colloids or growth of biofilms in porous media often depend on the molecular-level diffusive mixing. For example, for the formation of mineral phases, exceeding the saturation index for a mineral is a minimum requirement for precipitation to proceed. Solute mixing frequently occurs at the interface between two solutions each containing one or more soluble reactants, particularly in engineered systems where contaminant degradation or modification or fluid flow are objectives. Although many of the fundamental component processes involved in the deposition or solubilization of solid phases are reasonably well understood, including precipitation equilibrium and kinetics, fluid flow and solute transport, the deposition of chemical precipitates, biofilms and colloidal particles are all coupled to flow, and the science of such coupled processes is not well developed. How such precipitates (and conversely, dissolution of solids) are distributed in the subsurface along flow paths with chemical gradients is a complex and challenging problem. This is especially true in systems that undergo rapid change where equilibrium conditions cannot be assumed, particularly in subsurface systems where reactants are introduced rapidly, compared to most natural flow conditions, and where mixing fronts are generated.
Keywords	Corrosion Neutron absorbers Electrochemical corrosion Calcium Calcium carbonates Carbonates Colloids Deposition Diffusion Dissolution Fluid flow Hydrodynamics Kinetics Modifications Nucleation Porosity Precipitation Saturation Simulation Solutes
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Idaho National Laboratory, Idaho Falls, ID.; Department of Energy, Washington, DC.
Supplemental Notes	See also DE2007-912462. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200817

Electrochemical Corrosion Testing of Neutron Absorber Materials (October 2006).

Electrochemical Corrosion Testing of Neutron Absorber Materials (October 2006).
DE2008911717

Publication Date	2006
Personal Author	Lister, T.; Mizia, R.; Birk, S.; Matteson, B.; Tian, H.
Page Count	28
Abstract	Reactions that lead to the formation of mineral precipitates, colloids or growth of biofilms in porous media often depend on the molecular-level diffusive mixing. For example, for the formation of mineral phases, exceeding the saturation index for a mineral is a minimum requirement for precipitation to proceed. Solute mixing frequently occurs at the interface between two solutions each containing one or more soluble reactants, particularly in engineered systems where contaminant degradation or modification or fluid flow are objectives. Although many of the fundamental component processes involved in the deposition or solubilization of solid phases are reasonably well understood, including precipitation equilibrium and kinetics, fluid flow and solute transport, the deposition of chemical precipitates, biofilms and colloidal particles are all coupled to flow, and the science of such coupled processes is not well developed. How such precipitates (and conversely, dissolution of solids) are distributed in the subsurface along flow paths with chemical gradients is a complex and challenging problem. This is especially true in systems that undergo rapid change where equilibrium conditions cannot be assumed, particularly in subsurface systems where reactants are introduced rapidly, compared to most natural flow conditions, and where mixing fronts are generated.
Keywords	Corrosion Neutron absorbers Electrochemical corrosion Calcium Calcium carbonates Carbonates Colloids Deposition Diffusion Dissolution Fluid flow Hydrodynamics Kinetics Modifications Nucleation Porosity Precipitation Saturation Simulation Solutes
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Idaho National Laboratory, Idaho Falls, ID.; Department of Energy, Washington, DC.
Supplemental Notes	See also DE2007-912462. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200817