Electrical precipitators resistivity problems

Corrosion of the electrostatic precipitator that is used to remove the dust from flue gases that exit the boiler, has been a problem as design and operating techniques have evolved. An intensive research program by Thompson and Yeske [265] has overturned the widely accepted belief that acid condensation was causing the corrosion. In fact, water condensation was found to be the major cause. Flush mounted electrical resistance monitoring probes were used to measure instantaneous corrosion rates. A cooled conductivity probe was used for dewpoint measurement, and weld pad thermocouples were used for temperature measurement. 

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