Title: passivation potential
Long Title: IUPAC Gold Book - passivation potential
DOI: 10.1351/goldbook.P04444
Status: current

Definition
The most negative electrode potential at which the passivating film is formed. The passivation potential is equal to or more positive than the equilibrium potential of formation of the phase constituting the film. Usually, the corrosion current goes through a maximum at the passivation potential.

Related Terms
- corrosion: https://goldbook.iupac.org//terms/view/C01351
- corrosion current: https://goldbook.iupac.org//terms/view/C01358
- electrode potential: https://goldbook.iupac.org//terms/view/E01956
- film: https://goldbook.iupac.org//terms/view/F02366
- passive state: https://goldbook.iupac.org//terms/view/P04447

Source
- PAC, 1989, 61, 19. 'Electrochemical corrosion nomenclature (Recommendations 1988)' on page 21 (https://doi.org/10.1351/pac198961010019)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/P04444/html
- json: https://goldbook.iupac.org/terms/view/P04444/json
- xml: https://goldbook.iupac.org/terms/view/P04444/xml

Citation: Citation: 'passivation potential' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.P04444
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Accessed: 2026-05-01T12:43:51+00:00