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51318-11250-Effect of Manganese on the Corrosion Behavior of Selected Alloys in Kraft Recovery Boiler Superheater Environments

This study will aim to characterize the oxide scales formed on alloy surfaces under such superheated environments and how the presence of these oxides reduces corrosion.

 

Product Number: 51318-11250-SG
Author: Kasey Hanson / Preet M. Singh
Publication Date: 2018
Industry: Process Industries
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$20.00
$20.00

Energy demands of the modern pulp and paper mill are satisfied, in part, from turbine engines powered by heating steam within superheater tubes located in the upper furnace of kraft recovery boilers. Thus, in order to improve the energy generation efficiency of the steam turbines, raising the operating temperatures of recovery boilers is one solution to achieve higher steam temperatures. However, elevating the recovery boiler operating temperature results in increased fireside corrosion of superheater tubes, which are exposed to molten salts and gaseous environments. Previous work has shown a relation between increased levels of manganese present in the alloy composition with reduced corrosion rates of alloys coated in simulated superheater recovery boiler salt in the presence of steam. Moreover, in oxidizing environments this correlation is not observed.

This study will aim to characterize the oxide scales formed under the be tested conditions in order to determine which manganese-oxide scales form on alloy surfaces under such environments and how the presence of these oxides reduces corrosion rates in superheater environments.

Energy demands of the modern pulp and paper mill are satisfied, in part, from turbine engines powered by heating steam within superheater tubes located in the upper furnace of kraft recovery boilers. Thus, in order to improve the energy generation efficiency of the steam turbines, raising the operating temperatures of recovery boilers is one solution to achieve higher steam temperatures. However, elevating the recovery boiler operating temperature results in increased fireside corrosion of superheater tubes, which are exposed to molten salts and gaseous environments. Previous work has shown a relation between increased levels of manganese present in the alloy composition with reduced corrosion rates of alloys coated in simulated superheater recovery boiler salt in the presence of steam. Moreover, in oxidizing environments this correlation is not observed.

This study will aim to characterize the oxide scales formed under the be tested conditions in order to determine which manganese-oxide scales form on alloy surfaces under such environments and how the presence of these oxides reduces corrosion rates in superheater environments.

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