Communication—Capillary Effects on Metal Cation Solubility
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 01, 2023
- Source ID
- 10.1149/1945-7111/ad0e48
Entities
People
- K. Sieradzki
Organizations
- National Science Foundation
- Office of Naval Research