Corrosion and Deposits From Combustion of Solid Waste: Part 2—Chloride Effects on Boiler Tube and Scrubber Metals

Chlorides play an important role in corrosion of heat-transfer surfaces and wet-scrubbers in municipal incinerators. The nature of the deposits and the extent of corrosion have been investigated in a combined field and laboratory study. Corrosion by flue gases and accumulated deposits has been measured by probes exposed in large municipal incinerators. The corrosion rates of various metals by incinerator scrubber waters also have been determined. Parallel laboratory experiments were conducted to provide additional data under controlled environments for interpretation of corrosion reactions. General surface wastage, pitting, or stress-corrosion cracking was observed in different samples, depending on the exposure conditions.