... alloys indicated that 30%Cr is protective over this temperature range. high temperature oxidation coal ash corrosion boiler H₂O CO₂ INTRODUCTION The use of oxy-firing is one path to enable large-scale carbon capture and storage. Considerable laboratory research ^{1 - 11}...

... compositions for protecting tubes. high temperature oxidation coal ash corrosion boiler H₂O CO₂ INTRODUCTION Using oxygen rather than air for coal-fired boilers is a leading concept for enabling large-scale carbon capture and storage. ^{1 , 2} This strategy potentially could...

... and the conditions under which ER33-31 should be considered are reviewed in this paper. Coal Ash Corrosion Boiler Tube Weld Overlay Coal Boiler Er33-31 ERNiCr-4 BACKGROUND Superheaters in coal fired power plants are used to heat saturated steam from the boiler to higher temperatures in order to provide a dry...

... applications will be presented as well. Weld Overlay Low NOx Burners Waterwall Superheater Reheater Coal Ash Corrosion INTRODUCTION FM ERNiCrFe-7 Overlay Experience The inception of the Clean Air Act amendments of 1990 ushered in a new era of technology to the generation of electrical power by fossil...

...CONCLUSIONS To evaluate candidate materials for USC super-heater and re-heater tube in 700°C class USC boilers, coal ash corrosion and steam oxidation resistances were studied in laboratory test. The results are as follows, With respect to coal ash corrosion resistance, all tested candidate...

... to be utilized in steam superheaters and reheaters will need a combination of exceptional strength, and corrosion resistance to combat coal ash corrosion. Resistance to steam oxidation at high temperatures will be important for steam header pipe internals and superheater and reheater internals as well. Waterwall...

... and the coating was re-applied after each of the given time intervals. Abstract The nature of coal ash corrosion and factors affecting its severity are examined. Laboratory results for iron- and nickel-base alloys from a number of sources are compared. Flue gas composition (SO₂ content), coal ash...

...°C on five nickel-containing candidate boiler tube alloys. Figure 3 presents their results and reveals the bell shaped nature of coal ash corrosion in this temperature range due to the formation of liquid phase and its subsequent volatization with increasing temperature. Figure 3 also shows...

.... Corrosion behavior is examined in terms of chromium content of the alloy, the SO₂/SO₃ content of the flue gas, the alkali content of the coal ash and the surface temperature of the alloy exposed to the environment. coal ash corrosion oxidation sulfidation alkali sulfates laboratory...

... of an existing and advanced-cycle, coal-fired boiler. Samples of each alloy will be exposed for 4000, 12,000, and 16,000 hours of operation. The results will be presented for the metallurgical examination of the corrosion probe samples after 4000 hours of exposure. Coal Ash Corrosion Superheater Fireside...