Abstract
| Original language | English |
|---|---|
| Title of host publication | Advances in Materials Technology for Fossil Power Plants |
| Subtitle of host publication | Proceedings from the Seventh International Conference |
| Publisher | Electric Power Research Institute |
| Pages | 791-802 |
| ISBN (Print) | 978-1-62708-060-6 |
| Publication status | Published - 2014 |
| MoE publication type | A4 Article in a conference publication |
| Event | 7th International Conference on Advances in Materials Technology for Fossil Power Plants - Waikoloa, United States Duration: 22 Oct 2013 → 25 Oct 2013 Conference number: 7 |
Conference
| Conference | 7th International Conference on Advances in Materials Technology for Fossil Power Plants |
|---|---|
| Country | United States |
| City | Waikoloa |
| Period | 22/10/13 → 25/10/13 |
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Keywords
- steam oxidation
- boiler tube materials
- surface finish
Cite this
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Evaluation of supercritical oxidation resistance of boiler tube materials. / Yli-Olli, Sanni; Tuurna, Satu; Penttilä, Sami; Auerkari, Pertti; Coda Zabetta, Edgardo; Vänskä, Kyösti.
Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference. Electric Power Research Institute, 2014. p. 791-802.Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
TY - GEN
T1 - Evaluation of supercritical oxidation resistance of boiler tube materials
AU - Yli-Olli, Sanni
AU - Tuurna, Satu
AU - Penttilä, Sami
AU - Auerkari, Pertti
AU - Coda Zabetta, Edgardo
AU - Vänskä, Kyösti
N1 - Project code: 74023
PY - 2014
Y1 - 2014
N2 - To improve the efficiency of fossil fuel power plants the operating temperatures and pressures have a need to be increased. However, at high temperatures the steam side oxidation resistance becomes a critical issue for the steels used especially at the final stages of superheaters and reheaters. Apart from the chemical composition of the material, surface condition is a major factor affecting the oxidation resistance in steam and supercritical water. In this paper, stainless boiler steels (UNS S34710, S31035, S31042, S30942) are investigated in elevated steam oxidation conditions. Tests were conducted in a supercritical water autoclave environment (250 bar, with 125 ppb dissolved oxygen and a pH of 7) at 625°C, 650°C and 675°C for up to 1000h. Materials were tested with different surface finishes shot peened, milled and spark eroded. The results show an influence of surface finish on the early stages of oxidation. Oxides formed on more rough surfaces were more adherent, and thinner than on a ground surface. Tested materials with a chromium over 20 wt-% showed similar oxidation behavior at the lowest temperature, though oxides formed were dependent on the small alloying agents (Cu, Mn). More variation could be seen with increasing temperature.
AB - To improve the efficiency of fossil fuel power plants the operating temperatures and pressures have a need to be increased. However, at high temperatures the steam side oxidation resistance becomes a critical issue for the steels used especially at the final stages of superheaters and reheaters. Apart from the chemical composition of the material, surface condition is a major factor affecting the oxidation resistance in steam and supercritical water. In this paper, stainless boiler steels (UNS S34710, S31035, S31042, S30942) are investigated in elevated steam oxidation conditions. Tests were conducted in a supercritical water autoclave environment (250 bar, with 125 ppb dissolved oxygen and a pH of 7) at 625°C, 650°C and 675°C for up to 1000h. Materials were tested with different surface finishes shot peened, milled and spark eroded. The results show an influence of surface finish on the early stages of oxidation. Oxides formed on more rough surfaces were more adherent, and thinner than on a ground surface. Tested materials with a chromium over 20 wt-% showed similar oxidation behavior at the lowest temperature, though oxides formed were dependent on the small alloying agents (Cu, Mn). More variation could be seen with increasing temperature.
KW - steam oxidation
KW - boiler tube materials
KW - surface finish
UR - https://www.asminternational.org/search/-/journal_content/56/10192/05440G/PUBLICATION
M3 - Conference article in proceedings
SN - 978-1-62708-060-6
SP - 791
EP - 802
BT - Advances in Materials Technology for Fossil Power Plants
PB - Electric Power Research Institute
ER -