Morphologies of oxide growth and exfoliation in superheater and reheater tubing of steam boilers

Wright, Ian G.; Dooley, R. Barry
March 2011
Materials at High Temperatures;Mar2011, Vol. 28 Issue 1, p40
Academic Journal
The intent of this paper is to present the current state of knowledge concerning the development of the oxide morphologies associated with scales grown in steam on alloys used in the superheater and reheater circuits of conventional fossil and heat recovery steam generator plants, and the influence of those morphologies on the scale exfoliation behaviour. Scale development is described for three classes of alloy: standard 1 - 9 wt%Cr ferritic steels, using T22 as an example; the ferritic-martensitic steel T91; and the 300-series austenitic steels, represented by TP304 and TP347, for which coarse- and fine-grained versions are examined. Detailed information on oxidation mechanisms is combined with extensive knowledge of alloy behaviour in boiler service in an effort to allow engineers and materials scientists to gain an understanding of similarities and differences, as well as to appreciate the likely contributions of major parameters that influence oxide growth and exfoliation behaviour.


Related Articles

  • Ferritic steels for sodium-cooled fast reactors: Design principles and challenges. Raj, Baldev; Vijayalakshmi, M. // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Sep2010, Vol. 62 Issue 9, p75 

    n overview of the current status of development of ferritic steels for emerging fast reactor technologies is presented in this paper. The creep-resistant 9–12Cr ferritic/martensitic steels are classically known for steam generator applications. The excellent void swelling resistance of...

  • Influence of CO2 purity on the oxidation of a 12Cr ferritic - martensitic steel at 550� C and importance of the initial stage. Bouhieda, Soraya; Rouillard, Fabien; Wolski, Krzysztof // Materials at High Temperatures;Jul2012, Vol. 29 Issue 2, p151 

    It has been shown that ferritic - martensitic (F/M) steels with 12 wt% Cr can form a protective oxide layer depending on the CO2 purity from the first stages of oxidation. The impurities which could explain this difference could be O2. In the case where O2 concentration in the gas phase was...

  • Microstructure of EK-181 ferritic-martensitic steel after heat treatment under various conditions. Tyumentsev, A.; Chernov, V.; Leont'eva-Smirnova, M.; Astafurova, E.; Shevyako, N.; Litovchenko, I. // Technical Physics;Jan2012, Vol. 57 Issue 1, p48 

    The effect of heat treatment conditions on the microstructure and phase composition of a lowactivated high-temperature ferritic-martensitic EK-181 steel (Fe-12Cr-2W-V-Ta-Ba) is studied. Additional thermal cycling about the austenite-martensite phase transition temperature between quenching and...

  • Steam-side scale morphologies associated with scale exfoliation from ferritic steel T22. Wright, I.G.; Dooley, R.B. // Materials at High Temperatures;Sep2013, Vol. 30 Issue 3, p168 

    Observations of steam-formed scales on type T22 ferritic steel reheater tubes have provided some insights into the scale morphologies associated with exfoliation. Measurements indicated that as the total thickness of the adherent scales increased, the ratio of the thicknesses of the main inner...

  • Avedore 2 sets new benchmarks for efficiency, flexibility and environmental impact.  // Modern Power Systems;Jan2000, Vol. 20 Issue 1, p25 

    Focuses on the Avedore 2 power plant in Denmark. Combined heat and power generation through the application of a multifuel concept; Use of ultra supercritical boiler; Gas turbine technology; Design of biomass boiler. INSETS: Multifuel debut at Map Ta Phut;Why Avedore 2?.

  • Distribution of residual deformation effects in shell tubes from ferritic-martensitic steels. Perlovich, Yuriy; Isaenkova, Margarita; Zharikov, Evgeniy; Krymskaya, Olga // Advanced Materials Research;2014, Vol. 996, p124 

    The X-ray method of Generalized Pole Figures was used for the study of residual deformation effects in steel shell tubes for high-temperature atomic reactor. Ferritic-martensitic steel contained dispersed strengthening oxide particles and their behavior under technological treatment was of...

  • Small-angle neutron scattering investigation of the nanostructure of ferritic-martensitic 12%-chromium steels. Bogdanov, S.; Goshchitskii, B.; Parkhomenko, V.; Leontieva-Smirnova, M.; Chernov, V. // Physics of the Solid State;Jan2014, Vol. 56 Issue 1, p1 

    The nanostructure (nanoparticle distribution) of ferritic-martensitic 12%-chromium steels EK-181 (Fe-12Cr-2W-V-Ta-B) and ChS-139 (Fe-12Cr-2W-V-Ta-B-Nb-Mo) subjected to different modes of mechanical and heat treatments and neutron irradiation has been investigated using small-angle neutron...

  • Internal friction and brittle-ductile transition in structural materials. Kardashev, B. K.; Nefagin, A. S.; Ermolaev, G. N.; Leont’eva-Smirnova, M. V.; Potapenko, M. M.; Chernov, V. M. // Technical Physics Letters;Sep2006, Vol. 32 Issue 9, p799 

    The temperature dependences of internal friction (ultrasound decrement) and impact toughness of bcc metals (Fe-12Cr-W-V-Ta-B-C ferritic/martensitic steel, V-4Ti-4Cr vanadium-based alloy) have been studied in a temperature range from 100 to 300 K. The acoustic and mechanical characteristics...

  • Effect of Heat Input on Microstructure Evolution and Mechanical Properties in the Weld Heat-Affected Zone of 9Cr-2W-VTa Reduced Activation Ferritic-Martensitic Steel for Fusion Reactor. Moon, Joonoh; Lee, Chang-Hoon; Lee, Tae-Ho; Kim, Hyoung // Metallurgical & Materials Transactions. Part A;Jan2015, Vol. 46 Issue 1, p156 

    The phase transformation and mechanical properties in the weld heat-affected zone (HAZ) of a reduced activation ferritic/martensitic steel were explored. The samples for HAZs were prepared using a Gleeble simulator at different heat inputs. The base steel consisted of tempered martensite and...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics