We have performed a computer simulation of the current during
anodization of InP in aqueous KOH electrolyte based on the spatial
characteristics of the porous structures that are formed.
Specifically, we have developed a model, based on the expansion
and merging of the porous domains and compared current densities
during linear potential sweep and potentiostatic experiments to
their respective simulated current-density data. Furthermore, we
have compared the expected pore structure at particular stages of
etching with corresponding micrographs. From these
investigations we are able to demonstrate how the porous structure
influences the observed current density.