TP010 - Materials Selection for Kraft Digesters
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This paper is a practical introduction to material selection for kraft pulp digesters, where the vessel is exposed to aggressive conditions including contact with black and white liquors.

Alloy S32550 ("2605") was recommended for future digester fabrication on the strength of its performance over other alloys, including Alloy 2205. Because Ferralium® shares a closely similar specification, the findings support its use in the same application.

Scanned table of corrosion rates for various materials in liquor at 170 degrees C