Abstract
The electrochemical behavior and compositions of passive films formed on the constituent phases (α-phase, γ-phase) of 2205 duplex stainless steel (DSS) without coupling in neutral 3.5% NaCl solution were investigated, utilizing single-phase samples prepared by selective dissolution. The results demonstrate that, compared to γ-phase, Fe species in passive film of α-phase are more stable due to the higher content of Mo within α-phase. The superior stability of Cr (III) species in the passive layer of γ-phase may result from the higher content of Ni in γ-phase, which leads to the higher content of Cr, Cr/Fe ratio, and better passivity of passive layer. The beneficial effect of coupling of two phases on the passive behavior of 2205 DSS is also found.
| Original language | English |
|---|---|
| Pages (from-to) | 56-60 |
| Number of pages | 5 |
| Journal | Electrochemistry Communications |
| Volume | 57 |
| DOIs | |
| State | Published - 4 Jun 2015 |
| Externally published | Yes |
Keywords
- Cyclic volammetry
- Duplex stainless steel
- Passive film
- Selective dissolution
- XPS
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