Communication—Capillary Effects on Metal Cation Solubility

Karl Sieradzki

doi:10.1149/1945-7111/ad0e48

Communication—Capillary Effects on Metal Cation Solubility

Karl Sieradzki

Engineering, Ira A. Fulton Schools of (IAFSE)

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of capillarity on the chemical equilibrium between a dissolved metal cation and the corresponding metal oxide is determined within the framework of Gibbssian thermodynamics. We examined the equilibrium between Cr³⁺ and Cr₂O₃ and found that for 10⁻⁶M Cr³⁺ in the electrolyte and a curvature of −2 × 10⁹m⁻¹, the equilibrium pH is −1.8. The corresponding potential-pH diagram shows that chromium passivates in strong acids. This analysis potentially resolves a long-standing issue in corrosion science.

Original language	English (US)
Article number	111503
Journal	Journal of the Electrochemical Society
Volume	170
Issue number	11
DOIs	https://doi.org/10.1149/1945-7111/ad0e48
State	Published - 2023

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Condensed Matter Physics
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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abstract = "The effect of capillarity on the chemical equilibrium between a dissolved metal cation and the corresponding metal oxide is determined within the framework of Gibbssian thermodynamics. We examined the equilibrium between Cr3+ and Cr2O3 and found that for 10−6 M Cr3+ in the electrolyte and a curvature of −2 × 109 m−1, the equilibrium pH is −1.8. The corresponding potential-pH diagram shows that chromium passivates in strong acids. This analysis potentially resolves a long-standing issue in corrosion science.",

author = "Karl Sieradzki",

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AB - The effect of capillarity on the chemical equilibrium between a dissolved metal cation and the corresponding metal oxide is determined within the framework of Gibbssian thermodynamics. We examined the equilibrium between Cr3+ and Cr2O3 and found that for 10−6 M Cr3+ in the electrolyte and a curvature of −2 × 109 m−1, the equilibrium pH is −1.8. The corresponding potential-pH diagram shows that chromium passivates in strong acids. This analysis potentially resolves a long-standing issue in corrosion science.

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Communication—Capillary Effects on Metal Cation Solubility

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