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98194 Erosion-oxidation of mild steel in a temperature gradient

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Product Number: 51300-98194-SG
ISBN: 98194 1998 CP
Author: T.E. Howes, P.M. Rogers, J.A. Little, I.M. Hutchings
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Thinning of heat-exchanger tubes by crosion-corrosion has been a problem in fluidized bed combustors (FBCs), particularly at lower metal temperatures where thicker, mechanically protective oxide scales are unable to form. Many laboratory-scale tests have shown a decrease in material loss at higher temperatures, similar to that observed in FBC boilers. but also show a decreasein wastage al low temperatures (e.g. 200°C) which has not been detected in boilers. It has been suggested that this difference is due to the laboratory tests being carried out isothermally, whereas in a FBC boiler the fluidized bed is considerably hotter than the surface ol the metal heat exchanger tubing. In this laboratory study the simulation was therefore improved by internally cooling one of the two low carbon steel specimens which were rotated in a horizontal plane within a lightly fluidized bed with relative particle velocities of ...
Thinning of heat-exchanger tubes by crosion-corrosion has been a problem in fluidized bed combustors (FBCs), particularly at lower metal temperatures where thicker, mechanically protective oxide scales are unable to form. Many laboratory-scale tests have shown a decrease in material loss at higher temperatures, similar to that observed in FBC boilers. but also show a decreasein wastage al low temperatures (e.g. 200°C) which has not been detected in boilers. It has been suggested that this difference is due to the laboratory tests being carried out isothermally, whereas in a FBC boiler the fluidized bed is considerably hotter than the surface ol the metal heat exchanger tubing. In this laboratory study the simulation was therefore improved by internally cooling one of the two low carbon steel specimens which were rotated in a horizontal plane within a lightly fluidized bed with relative particle velocities of ...
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