Severe corrosion occurred on the external surface of tubes and tube supports of 25 Cr-12 Ni alloy steel in a furnace operating at metal temperatures from 1600 to 2100 F. Corrosion to a depth of ½ inch occured in six weeks' time. This furnace was operating under normal firing conditions with little sulfur in the gas. An investigation of the problem has revealed that the metal loss of furnace parts was accelerated by contaminants fluxing the hot metal surfaces. 4.2.3

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© 1960 National Association of Corrosion Engineers
1960
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