Influence of Ash Composition on the Corrosion Rate of Superheater Tubes, 2001 Engineering / Finishing & Converting Conference Proceedings

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Corrosion tests of the superheater tubes for recovery boilers were conducted, using a test apparatus capable of controlling gas temperature and metal temperature individually, to study the effects of potassium and chlorine ash concentrations on corrosion.

The results show that the corrosion rate increases due to increases of potassium and chlorine ash concentrations at relatively low temperature, where corrosion due to molten salt does not occur directly.

From scale analysis results after the corrosion tests, it is inferred that formation of chloride compounds at the metal side of scale promotes corrosion.

Author: Nishio, T., Shinohara, M., Matsumoto, H., Arakawa, Y.
Influence of Ash Composition on the Corrosion Rate of Superh
Influence of Ash Composition on the Corrosion Rate of Superheater Tubes, 2001 Engineering / Finishing & Converting Conference Proceedings
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