Materials selection for kraft batch digesters
- Bacon Donaldson Consulting Engineers, Richmond, British Columbia (Canada)
- Stone Container Corp., Burr Ridge, IL (United States)
- Stone-Consolidated Corp., Fort Frances, Ontario (Canada)
Several candidate materials were evaluated by corrosion testing in autoclaves containing white and black liquors for batch digesters. The relationship between corrosion rate and corrosion potential was determined for ASTM SA516-Grade 70 carbon steel, UNS S30403 (Type 304L) austenitic stainless steel, UNS S31803 (2205) and UNS S32550 (2605) duplex stainless steels, and two stainless steel weld overlays, applied by the GMAW (gas metal arc welding) and SAW (submerged arc welding) processes. The tests revealed that SA516-Grade 70 carbon steel and type 304L stainless steel can experience high rates of corrosion. For the duplex stainless steels and weld overlays, corrosion resistance improved with chromium content. A chromium content of at least 25% was found to be necessary for good corrosion resistance.
- OSTI ID:
- 509503
- Report Number(s):
- CONF-970332--
- Country of Publication:
- United States
- Language:
- English
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