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51318-11372-Selection of Superheater Materials for Biomass-fired Boilers

This work presents the results of a field-based study designed to evaluate the corrosion performance of five alloys exposed in a Canadian biomass-fired boiler attached to a gasifier for 3,552 hours.

Product Number: 51318-11372-SG
Author: V. Padilla
Publication Date: 2018
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This work presents the results of a field-based study designed to evaluate the corrosion performance of five alloys exposed in a Canadian biomass-fired boiler attached to a gasifier for 3,552 h. The corrosion performance of the candidate alloys can be ranked as follows: N08028 > S34709 > S21500 > S31009 > K21590. With the exception of S31009, the results showed a good correlation between the amount of chromium in the alloys and their resistance to high temperature corrosion. The low levels of chlorides, the flue gas composition, and the evidence gathered by SEM analysis suggest that oxidation was the primary attack mechanism.

 

Key words: high temperature corrosion, super heaters, biomass, boiler, gasification

This work presents the results of a field-based study designed to evaluate the corrosion performance of five alloys exposed in a Canadian biomass-fired boiler attached to a gasifier for 3,552 h. The corrosion performance of the candidate alloys can be ranked as follows: N08028 > S34709 > S21500 > S31009 > K21590. With the exception of S31009, the results showed a good correlation between the amount of chromium in the alloys and their resistance to high temperature corrosion. The low levels of chlorides, the flue gas composition, and the evidence gathered by SEM analysis suggest that oxidation was the primary attack mechanism.

 

Key words: high temperature corrosion, super heaters, biomass, boiler, gasification

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