One-Dimensional Approach to Modeling Damage Evolution in Galvanic Corrosion
A one-dimensional mathematical model is developed to describe time-dependent damage evolution in well-mixed (spatially uniform species concentrations) galvanic systems using an IR drop approach. An asymptotic procedure taking advantage of disparity in length scales (thin film approximation for the electrolyte thickness) is used to derive the model. Limitations that result from the reduction of dimension are described, along with an analysis demonstrating the ability of the 1D model to capture physical phenomena, such as area ratio effects. Computed potential, current density, and corrosion damage profiles are compared and verified with experimental data available in the literature and 2D galvanic corrosion simulations. Fully derived governing equations for several different 1D geometries are presented.
Stenta, Aaron J.; Basco, S.; Smith, A.; Clemons, Curtis B.; Golovaty, Dimitry; Kreider, Kevin L.; Wilder, Joseph W.; Young, Gerald W.; and Lillard, Robert S., "One-Dimensional Approach to Modeling Damage Evolution in Galvanic Corrosion" (2014). Mathematics Faculty Research. 1.