STEEL CORROSION AT 600°C IN SINGLE AND DUAL CONDITION IN OXYFUEL ATMOSPHERE
Coal-fired power plants using the Oxyfuel process are being developed to produce electricity with zero CO2 emission. Steels used in this and other processes are often exposed to different atmospheres in each side of the material, especially in heat exchangers and solid oxide fuel cells. Some studi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia, Materiais e Mineração
2014-10-01
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| Series: | Tecnologia em Metalurgia, Materiais e Mineração |
| Subjects: | |
| Online Access: | http://www.tecnologiammm.com.br/files/v11n2/v11n2a02.pdf |
| Summary: | Coal-fired power plants using the Oxyfuel process are being developed to produce electricity with zero CO2
emission. Steels used in this and other processes are often exposed to different atmospheres in each side of the material,
especially in heat exchangers and solid oxide fuel cells. Some studies have shown that steels exposed to different hydrogen
partial pressures in each side have a different corrosion behavior from steels exposed to a single atmosphere condition.
In this investigation, two experimental steels were studied at 600°C and 1 atm in dual atmospheres containing water
vapor in one side and flue gas in the other and they were compared to steels oxidized in single atmospheres. The gas
composition used is similar to the ones found in Oxyfuel coal power plants, where there is a great concentration of CO2, and also H2O and SO2. Analyses were made using SEM and TEM. |
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| ISSN: | 2176-1515 2176-1523 |