The product of diffusion coefficient and saturation concentration of metal ions (DM+ center dot C-tot) is associated with steady state dissolution of metal in corrosion pits. In our previous paper, DM+ center dot C-tot was modeled for one dimensional (1D) pit dissolution of super 13Cr stainless steel (S13Cr) by taking into account the common ion effect, as well as viscosity and temperature influences. However, the modeled values were only half of the experimentally-measured DM+ center dot C-tot, implying that DM+ and/or C-tot were underestimated. To improve the modeling of DM+ center dot C-tot, the effects of complexation and electromigration were additionally considered, which led to the definition of effective diffusion coefficient (D-eff) applicable for the diffusion of metal ionic species under the combined effect of viscosity, temperature and electric field inside a growing 1D pit. The newly modeled D-eff center dot C-tot values were very close to the experimental values, validating the modeling approach described in this paper. (C) The Author(s) 2016. Published by ECS. All rights reserved.