As a follow up to my January 2018 editorial outlining some of the National Academy of Science engineering challenges facing us in the 21st century, the next editorial in this series explores the challenges faced in corrosion modeling. Corrosion is a highly complex process involving coupled chemical, electrochemical, sometimes biological, and solid-state reactions. Both thermodynamic and kinetic factors incorporating materials science, surface science, and environmental and materials chemistry govern corrosion susceptibility and the associated outcomes. Building on Part I of this editorial series’ focus, on the multi-scale and multi-physics nature of corrosion processes, we now explore the incorporation of those processes with different stages of corrosion.

The difficulty in distilling complex corrosion behavior into key descriptors of corrosion susceptibility that engineers can use to guide materials selection, such as a pitting resistance equivalency number applied to corrosion resistant alloys (PREN)3...

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