The corrosion resistance of boiler steels in simulated combustion atmospheres with various CO2 content

Szymon Sroda, Martti Mäkipää

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

1 Citation (Scopus)

Abstract

In the present study the common ferritic and austenitic steels (2.25Cr1Mo, X10, X20, TP347H, AC66, Sanicro28, Esshete 1250) usually used in biomass and waste combustion processes were investigated. The multi-sample exposure tests were carried out at isothermal temperature of 535 C in various simulated combustion atmospheres (22%H2O+ 5%O2 +xCO2 + N2) with different CO2 content varying from 0 to 25 vol-% for the samples without deposit and with filter/cyclone ash deposition. Post experimental analyses have been made using SEM/EDS and XRD techniques. The presence of the deposit increases the corrosion rate of all studied materials, especially for the ferritic steels. The corrosion rate increases with increasing CO2 content in the atmosphere. That behaviour was observed on no-deposited and deposited samples. The obtained result shows that for the ferritic steel the corrosion resistance increases with increasing Cr content in steel but only for non-deposited samples. The ferritic steels with deposits behave different. There is only a small difference on the corrosion rate of X10 (8.5 m-% Cr) and X20 (12.7 m-% Cr), even in some cases X10 exhibits better corrosion resistance. This effect could be especially observed in the atmospheres with high CO2 content.
Original languageEnglish
Title of host publicationBALTICA VI - Life management and maintenance for power plants. Vol. 2
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages553-565
ISBN (Electronic)951-38-6294-1
ISBN (Print)951-38-6293-3
Publication statusPublished - 2004
MoE publication typeB3 Non-refereed article in conference proceedings
EventBALTICA VI - Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
Duration: 8 Jun 200410 Jun 2004

Publication series

SeriesVTT Symposium
Number234
ISSN0357-9387

Conference

ConferenceBALTICA VI - Life Management and Maintenance for Power Plants
CountryFinland
CityHelsinki-Stockholm
Period8/06/0410/06/04

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