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11159 Corrosion Monitoring of Recovery Boiler Tubes by Hydrogen Flux Measurement

Picture for 11159 Corrosion Monitoring of Recovery Boiler Tubes by Hydrogen Flux Measurement
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Product Number: 51300-11159-SG
ISBN: 11159 2011 CP
Author: Andrew D. Justason, Andrew Feicht, Kelly McKeen, Belknap B. Gray, Don McCabe and Chris Halcrow
Publication Date: 2011
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The present paper compares corrosion rates from a recovery boiler tube during two planned maintenance outages and respective re-starts. An acid-wash of the boiler tubes was performed during the first outage, but not the second. A non-intrusive, online hydrogen effusion probe was used to monitor hydrogen flux in real-time during both outages. Those two datasets were then plotted side-by-side in order to compare the effect of the acid-wash on hydrogen flux, and correspondingly, corrosion rate. This is believed to be the first successful attempt to quantifiably compare boiler tube corrosion rates during and post-maintenance outage.

Key words: hydrogen flux, corrosion monitoring, online, recovery boilers, boiler tubes
The present paper compares corrosion rates from a recovery boiler tube during two planned maintenance outages and respective re-starts. An acid-wash of the boiler tubes was performed during the first outage, but not the second. A non-intrusive, online hydrogen effusion probe was used to monitor hydrogen flux in real-time during both outages. Those two datasets were then plotted side-by-side in order to compare the effect of the acid-wash on hydrogen flux, and correspondingly, corrosion rate. This is believed to be the first successful attempt to quantifiably compare boiler tube corrosion rates during and post-maintenance outage.

Key words: hydrogen flux, corrosion monitoring, online, recovery boilers, boiler tubes
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