Deposition of suspended magnetite in high temperature high pressure boiler environments

Balaji Raman, Derek M. Hall, Stephen J. Shulder, Michael Caravaggio, Serguei N. Lvov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Suspended magnetite particles in boiler waters were found to deposit in orifice headers, impeding flow and causing inefficiencies and boiler tube failures from overheating. Particle interactions due to the zeta potential developed on the colloidal magnetite particles could also be a factor in deposition. To study the mechanism behind the deposition of suspended magnetite on stainless steel, a high temperature high pressure electrophoretic deposition cell with provisions to test 304 stainless steel substrates has been developed. The tests, conducted at pH25°C of 9.3 in simulated boiler conditions in terms of temperature, pressure and water chemistry. The deposition was monitored using in-situ Electrochemical Impedance Spectroscopy (EIS) and post-test surface analyses were carried out on the substrate. The results of the tests concurred with the theory on oxide particle behavior in aqueous systems and colloidal stability. The specific conditions in the boiler that favor deposition have been successfully replicated.

Original languageEnglish (US)
Title of host publicationElectrochemical Engineering General Session
EditorsE. J. Taylor, V. Subramanian, V. K. Ramani
PublisherElectrochemical Society Inc.
Pages43-56
Number of pages14
Edition21
ISBN (Electronic)9781607685395
DOIs
StatePublished - Jan 1 2015
EventSymposium on Electrochemical Engineering General Session - 227th ECS Meeting - Chicago, United States
Duration: May 24 2015May 28 2015

Publication series

NameECS Transactions
Number21
Volume66
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

OtherSymposium on Electrochemical Engineering General Session - 227th ECS Meeting
CountryUnited States
CityChicago
Period5/24/155/28/15

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Raman, B., Hall, D. M., Shulder, S. J., Caravaggio, M., & Lvov, S. N. (2015). Deposition of suspended magnetite in high temperature high pressure boiler environments. In E. J. Taylor, V. Subramanian, & V. K. Ramani (Eds.), Electrochemical Engineering General Session (21 ed., pp. 43-56). (ECS Transactions; Vol. 66, No. 21). Electrochemical Society Inc.. https://doi.org/10.1149/06621.0043ecst