6533b860fe1ef96bd12c368c
RESEARCH PRODUCT
Effect of temperature on the passive state of Alloy 31 in a LiBr solution: Passivation and Mott-Schottky analysis
Ramón Manuel Fernández DomeneE. Blasco-tamaritD.m. García-garcíaJose Garcia-antonsubject
CARBON-STEELAUSTENITIC STAINLESS-STEELBORATE BUFFER SOLUTIONOXIDE-FILMSINGENIERIA QUIMICAElectroquímicaPOINT-DEFECT MODELELECTRONIC-STRUCTUREREPASSIVATION KINETICSELECTROCHEMICAL-IMPEDANCE SPECTROSCOPYPOTENTIAL DISTRIBUTIONACTIVITY-COEFFICIENTSAcer Corrosiódescription
The passive behaviour of Alloy 31, a highly-alloyed austenitic stainless steel (UNS N08031), has been investigated in a LiBr heavy brine (700 g/l) at different temperatures using potentiostatic polarisation and Mott-Schottky analysis. Cation vacancies have been found to be the dominant defect in the passive films formed on Alloy 31. An increase in temperature enhanced the generation of cation vacancies at the film/solution interface and raised the steady-state passive current density. The density of defects within the passive film also increased significantly with temperature, making the film more conductive and less protective against localised attacks.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-11-01 |