Avoid stainless steel failures in FGD systems

Journal Article · Wed Nov 01 00:00:00 EST 1995 · Chemical Engineering Progress

OSTI ID:160799

Mills, J P; Schillmoller, C M

Preventing pitting and localized corrosion is the key to success where low maintenance and high reliability are rime considerations in flue-gas desulfurization (FGD) designs. Knowing when to use a stainless steel, and when not to, is crucial. Operating parameters and environmental factors greatly affect alloy performance, especially pH, temperature, and chloride and oxygen levels. Failures of stainless steels can be avoided by understanding their limits in light of these variables. This article will focus on the capabilities of Types 316L, 317L, 317LM, 317LMN, 904L, and 6% Mo stainless steels and their applications, as well as provide details on unique combination of mechanical properties and corrosion resistance of the 22% Cr duplex and 25% Cr super-duplex stainless steels in acid chloride systems. Guidelines will be presented on methods to prevent intergranular corrosion, stress corrosion cracking, and pitting and crevice corrosion, and what process steps can be taken to assure reasonable performance of marginal alloy selections. Emphasis will be on the lime/limestone wet scrubbing process and the quencher/absorber.

• OSTI ID: 160799
• Journal Information: Chemical Engineering Progress, Vol. 91, Issue 11; Other Information: PBD: Nov 1995
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
POLLUTION CONTROL EQUIPMENT
CORROSION PROTECTION
STAINLESS STEEL-316L
CORROSION RESISTANCE
STAINLESS STEEL-317
CHROMIUM-NICKEL-MOLYBDENUM STEELS
NICKEL-CHROMIUM STEELS
FLUE GAS
DESULFURIZATION
PITTING CORROSION
INTERGRANULAR CORROSION
CRACK PROPAGATION
RECOMMENDATIONS
LIME-LIMESTONE WET SCRUBBING PROCESSES