The influence of laboratory test procedures on scale growth kinetics and microstructure during steam oxidation testing

2005 ◽  
Vol 22 (1-2) ◽  
pp. 27-33 ◽  
Author(s):  
Steve Osgerby ◽  
Joe Quadakkers
Keyword(s):  
Laboratory Test ◽  
Growth Kinetics ◽  
Steam Oxidation ◽  
Scale Growth ◽  
Test Procedures ◽  
Oxidation Testing

On the Estimation of Oxide Scale Growth in T22 Superheater and Reheater Tubes

2012 ◽  
Vol 516-517 ◽  
pp. 364-369
Author(s):  
Cai Xia Bian ◽  
Ke Yi Zhou ◽  
Jian Qun Xu
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Oxide Scale ◽  
Growth Kinetics ◽  
Iterative Procedure ◽  
Heat Transfer Analysis ◽  
Oxide Growth ◽  
Scale Growth ◽  
Small Influence ◽  
Influence Degree

In this paper, an iterative procedure was performed for the prediction of scale growth in T22 superheater and reheater tubes, which utilized empirical formulae for oxide-growth kinetics in steam and heat transfer analysis. Several expressions for oxide-growth kinetics and different thermal conductivities of scale were considered in calculations. The results indicate that the expression for oxide-growth kinetics can affect the estimated results significantly, and the thermal conductivity of scale has relatively small influence on the prediction of scale growth, but the influence degree increases with time.

Steam oxidation of ferritic steels – laboratory test kinetic data

2005 ◽  
Vol 22 (1-2) ◽  
pp. 47-60 ◽  
Author(s):  
W. J. Quadakkers ◽  
P. J. Ennis ◽  
J. Zurek ◽  
M. Michalik
Keyword(s):  
Laboratory Test ◽  
Kinetic Data ◽  
Steam Oxidation ◽  
Ferritic Steels

Steam Oxidation Testing of Coatings for Next Generation Steam Power Plant Components

2006 ◽  
Vol 522-523 ◽  
pp. 205-212 ◽  
Author(s):  
Alina Agüero ◽  
Marcos Gutiérrez ◽  
Raúl Muelas
Keyword(s):  
Steam Oxidation ◽  
Steam Turbines ◽  
Generation Efficiency ◽  
Steam Power ◽  
Hvof Coatings ◽  
Higher Power ◽  
Oxidation Resistant ◽  
Cermet Materials ◽  
Oxidation Testing ◽  
Insight Into

To achieve higher power generation efficiency in steam turbines, operating temperatures are expected to rise from 550°C to 650°C. The use of oxidation resistant coatings on currently available materials, with high creep strength but inferior steam oxidation resistance, is being explored in order to accomplish this goal in the context of the European project “Coatings for Supercritical Steam Cycles” (SUPERCOAT). Coating techniques have been chosen on the basis of being potentially appropriate for coating steam turbine components: the application of metallic and ceramic slurries, pack cementation and the deposition of alloyed and cermet materials by thermal spray. The coatings were characterised by metallography, SEM-EDS and XRD and steam oxidation and thermal cycling laboratory testing was carried out at 650º C. In this presentation, the testing results of selected coatings will be shown including those which exhibit the most promising behaviour. For instance, slurry aluminides have been exposed to steam at 650°C for more than 38,000 h (test ongoing) without evidence of substrate attack. Some HVOF coatings such as FeAl, NiCr and FeCr also have shown excellent behaviour. The results have provided information regarding the mechanism of protection and degradation of these coatings as well as insight into new coating development.

Study of oxide and α-Zr(O) growth kinetics from high temperature steam oxidation of Zircaloy-4 cladding

2015 ◽  
Vol 467 ◽  
pp. 820-831 ◽  
Author(s):  
Tapan K. Sawarn ◽  
Suparna Banerjee ◽  
Akanksha Samanta ◽  
B.N. Rath ◽  
Sunil Kumar
Keyword(s):  
High Temperature ◽  
Growth Kinetics ◽  
Steam Oxidation ◽  
High Temperature Steam
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