| Autor: |
Soltis, Jozef, Laycock, Nick, Cook, Anthony, Krouse, Donal, White, Stephen |
| Zdroj: |
ECS Transactions; March 2008, Vol. 11 Issue: 15 p75-87, 13p |
| Abstrakt: |
A series of experiments were conducted to study anodic dissolution kinetics and pit morphology using 0.025 mm and 1 mm thick 99.99% Al wires, respectively. There is a strong dependence of the potentials associated with noise-cessation and pit repassivation on increasing concentration of HCl in the bulk electrolyte. The potential regions dominated by noiseless current signatures were likely associated with the salt-free surface of a given pit during the dissolution process. Change in pit anode resistance, Rp, with applied potential was assigned to the dependence of the pit solution resistance on concentration, and the current oscillations observed were related to hydrogen evolution. Crystallographic pit propagation was observed for 1 mm artificial pits and for pitting sites developed during potentiodynamic scans. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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