This paper delivers an analysis of the steam oxidation of the austenitic steels used for the super heater and re-heater tubing. It compares the behaviour of TP347HFG, Super 304H and HR3C at 650 and 700°C with three different steam flowrates: 4, 16· 40 mm/s. Steam oxidation tests were performed in closed loop system for 1000 h. The differences in the steam oxidation behaviour of these materials are considered in terms of the alloy compositions (especially chromium content), the steam flowrate and the material surface finish.
WrightIG and PintBA: ‘An assessment of the high temperature oxidation behavior of Fe–Cr steels in water vapor and steam’NACE CORROSION Int., Houston, TX, USA, April 2002, NACE International.
2.
WrightIG and DooleyRB: ‘A review of the oxidation behaviour of structureal alloys in steam’Int. Mater. Rev.201055129–167.
3.
Electric Power Research Institute. Program on Technology Innovation: Oxide Growth and Exfoliation on Alloys Exposed to Steam. Palo Alto, CA, USA, EPRI2007.
4.
SarverJ and TanzoshJ: ‘Steam oxidation testing of candidate Ultrasupercritical boiler materials’Proc. 28th Int. Tech. Conf. on ‘Coal utilization and fuel systems’, Clearwater, FL, USA, March 2003, Coal Technology Association, pp 1-5.
5.
HanssonAN and MontgomeryM: ‘Steam oxidation of TP347HFG in power plants’Mater. Sci. Forum2006522-523181–188.
6.
HanssonAMontgomeryM and SomersM: ‘Development of the inner oxide zone upon oxidation of an austenitic stainless steel’Mater. High Temp.20092639–44.
7.
ViswanathanRSarverJ and TanzoshJM: ‘Boiler materials for ultra-supercritical coal power plants - steamside oxidation’J. Mater. Eng. Perform.200531255–263.
8.
JianminJMontgomeryMLarsenO and JensenA: ‘Investigation on steam oxidation behaviour of TP347HFG Part 1: Exposure at 256 bar’Mater. Corros.200556459–467.
9.
LukaszewiczMSimmsNJDudziakT and NichollsJr: ‘Characterisation of oxide scales developed on high temperature resistant alloys in pure steam environments’Mater. High Temp.201229210–218.
10.
YoungD: ‘Effects of water vapour on the oxidation of chromia formers’Mater. Sci. Forum2008595-598, 1189-1197.
11.
AstemanHSvenssonJENorellM and JohanssonLG: ‘Influence of water vapour and flow rate on the high - temperature oxidation of 304L; effect of chromium oxide hydroxide evaporation’Oxid. Met.20005411–26.
12.
AstemanHSvenssonJ and JohanssonL: ‘Evidence for chromium evaporation influencing the oxidation of 304L: The effect of temperature and flow rate’Oxid. Met.200257193–216.
13.
HalvarssonMTangJAstemanHSvenssonJ and JohanssonL: ‘Microstructural invastigation of the breakdown of the protective oxides scale on a 304 steel in the presence of the oxygen and water vapour a 600°C’Corros. Sci.200648, 2014-2035.
14.
HolcombG: ‘Steam oxidation and chromia evaporation in ultrasuperctitical steam boilers and turbines’J. Electrochem. Soc.200915681–92.
15.
HuczkowskiPErtlSPiron-AbellanJChristiansenNHöflerTShemetVSingheiserL and QuadakkersWJ: ‘The effect of component thickness on lifetime and oxidation rate of chromia forming ferritic steels in low and high pO2 environments’Mater. High Temp.20052279–88.
16.
HuczkowskiPChristiansenNShemetVPiron-AbellanJSingheiserL and QuadakkersWJ: ‘Oxidation limited life times of chromia forming ferritic steels’Mater. Corros.200455825–829.
17.
ŻurekJMeierGEssumanEHanselMSingheiserL and QuadakkersW: ‘Effect of specimen thickness on the growth rate of chromia scales on Ni-based alloys in high- and low pO2 gases’J. Alloys Compd2009465450–458.
18.
HanssonAPantleonKGrumsenF and SomersM: ‘Microstructure evolution during steam oxidation of Nb stabilized austenitic stainless steel’Oxid. Met.200973289–309.
