Journal of Failure Analysis and Prevention

, Volume 17, Issue 5, pp 831–837 | Cite as

Chloride Pitting of Steam Generator Boiler Coils

Case History---Peer-Reviewed
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Abstract

In this case study, pitting observed on boiler coil samples were analyzed. Chloride pitting was confirmed by chlorides identified in energy-dispersive X-ray (EDX) spectra and maps. The pitting failure was caused by initial chloride fluxing of the oxide/scale layering, followed by a chloride concentrating mechanism. The observed pitting can be prevented by water treatment to eliminate the halide ions followed by boiler scale and deposition control treatment.

Keywords

Boiler Chloride pitting Iron oxide Scale Energy-dispersive X-ray 

References

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    J.A. Kelly, T.R. Filipowski, in Controlling Iron Oxide Deposition in Boiler Systems TAPPI Engineering Conference (TAPPI September 20, 1978) p. 467Google Scholar
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    J.A. Kelly, M.L. Palmer, Iron oxide deposition—complete system control. in Proceedings, 40th International Water Conference (Pittsburg, PA: Engineers Society of Western Pennsylvania, 1979)Google Scholar
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    D. O. Albina, Theory and Experience on Corrosion of Waterwall and Superheater Tubes of Waste-to-Energy Facilities, Department of Earth and Environmental Engineering Fu Foundation School of Engineering, August 2005Google Scholar

Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Global Corrosion Consultancy LtdManchesterUK

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