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Abstract
Mathematical models have been developed for the corrosion of metal building service elements (such as electrical receptacle boxes and pipes) in contact with thermal insulation. The amount of corrosion and corrosion rate depend on the amount of condensation, the rate of drying and the leaching rate of impurities from the insulation. Condensation on a metal element is more likely when it is colder than the surrounding insulation or when humidities are high. The amount of condensation within an electrical receptacle box increases with increasing flow rate to a maximum after which it decreases. Higher relative humidity and low temperature result in longer drying times. Higher drying rates and higher leaching rates result in increased corrosion rates. patch corrosion was more sensitive to changes in drying and leaching rates than uniform corrosion, and increases more rapidly with time.
Mathematical models have been developed for the corrosion of metal building service elements (such as electrical receptacle boxes and pipes) in contact with thermal insulation. The amount of corrosion and corrosion rate depend on the amount of condensation, the rate of drying and the leaching rate of impurities from the insulation. Condensation on a metal element is more likely when it is colder than the surrounding insulation or when humidities are high. The amount of condensation within an electrical receptacle box increases with increasing flow rate to a maximum after which it decreases. Higher relative humidity and low temperature result in longer drying times. Higher drying rates and higher leaching rates result in increased corrosion rates. patch corrosion was more sensitive to changes in drying and leaching rates than uniform corrosion, and increases more rapidly with time.
Date
9/1981
9/1981
Author(s)
James Pommersheim; John Lobo; James Clifton
James Pommersheim; John Lobo; James Clifton
Page(s)
274-
274-
Keyword(s)
condensation; corrosion; electrical box; mathematical model; patch corrosion; thermal insulation; relative humidity;
condensation; corrosion; electrical box; mathematical model; patch corrosion; thermal insulation; relative humidity;