The Four-Component Corrosion Cell

One mechanism from Chapter 7: Corrosion.

flowchart TD
    A["Anode: Fe to Fe2+ + 2e-"] -->|"electrons through metal"| MP["Metallic Path"]
    MP -->|"electrons delivered"| C["Cathode: O2 + 2H2O + 4e- to 4OH-"]
    C -->|"OH- migrates"| E["Electrolyte (water)"]
    E -->|"Fe2+ migrates"| A
    A -.->|"Fe2+ meets OH-"| BP["Fe(OH)2 then rust"]
    C -.->|"OH- meets Fe2+"| BP

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Diagrams · The Big Picture · Chapter 7