Proposed model for quantification of dissolution—and evolution of a steel-CO₂ solution interface by the transmission line approach

摘要

The corrosion mechanisms occurring at the homogeneous porous layer was determined assuming that the pores had a cylindrical geometry, and that the initial interface of a carbon steel-CO₂ solution behaved as a transmission line (TL). TL modeling quantitatively assessed the impedance distribution and the mesoporous layer formation and evolution at the interface, while describing the physical characteristics of the mesoporous FeCO₃ layer at the base and wall within the initial pore. The TL helped to characterize four stages during the interfacial evolution: active, active-porous layer, mixed layer, and the reactive stages. Using TLs helped to quantify the dissolution process and distinguish the mechanisms with good agreement between calculated magnitudes and experimental data.