Abstract
If an analytical cell belongs to a part that is defined with a base metal that is zircaloy, then there will only be a single surface layer (the ferrite layer born by crystallization) and no sublayer equations will be required. Similarly for regions defined as Stellite, it will not be necessary to model hydrothermal substitution of cobalt into the sublayer (as is done for iron- or nickel-based alloys) because corrosion growth/release defines the sublayer mass of cobalt in these alloys exactly. One of the critical user inputs required for the definition of each region (or part) of the hydraulic flow path is the composition of the base metal because it will define which set of problem statement equations will be used to solve for the dependent variables. The ferrite layer surface equations are the same for all base metal types, with only one exception. Neither zircaloy nor Stellite base metals is coupled to a sublayer solid phase.
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