Abstract
The role of two oxygen sources, oxygen and water vapor, in the initiation of KCl-induced high-temperature corrosion was addressed by studying two high-alloyed commercial materials at 550 °C. The differentiation between the two oxygen sources was implemented with 18O-enriched water and 16O2.
Based on the results, the solid-solid reaction between KCl(s) and the protective oxide on the alloy surface appeared to be more responsible for corrosion than the gas-solid reaction between KCl(g) and the protective oxide. Water was more involved in the abovementioned reactions than O2: 18O was the main oxygen isotope found in the formed surface oxides and intermediates.
Based on the results, the solid-solid reaction between KCl(s) and the protective oxide on the alloy surface appeared to be more responsible for corrosion than the gas-solid reaction between KCl(g) and the protective oxide. Water was more involved in the abovementioned reactions than O2: 18O was the main oxygen isotope found in the formed surface oxides and intermediates.
| Original language | English |
|---|---|
| Article number | 109332 |
| Journal | Corrosion Science |
| Volume | 183 |
| DOIs | |
| Publication status | Published - 1 May 2021 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- Alloy
- Stainless steel
- SEM
- SIMS
- TEM
- XPS
- High-temperature corrosion