Actions for Determination of interaction between different waters and chemical antifreeze additives. Task 3 of solar collector studies for solar heating and cooling applications. Final technical progress report [electronic resource].

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Determination of interaction between different waters and chemical antifreeze additives. Task 3 of solar collector studies for solar heating and cooling applications. Final technical progress report [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1980.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 75 : digital, PDF file
Additional Creators
Battelle Memorial Institute, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Chemical degradation of aqueous glycol solutions was monitored during stagnant exposure at temperatures of 100 C and 180 C. Changes in corrosivity of the solutions toward alloys of construction in solar collectors were also determined. The solutions consisted of equivolume mixtures of reagent grade ethylene glycol and water, and propylene glycol and water. The water was either distilled/deionized, or a mildy corrosive solution containing 100 ppM each of chloride, sulfate, and bicarbonate ions. The solutions were exposed with and without contact with metals, these metals being unalloyed copper (CA 122), 1018 steel, and aluminum alloys 1100, 3003, and 6061. Either air or nitrogen was purged through the solutions at 100 C, whereas for solutions at 180 C the autoclave head space was filled with air or nitrogen prior to sealing the autoclave. Degradation was measured by noting changes in solution pH and accumulation of organic acids during prolonged elevated temperature exposures. Changes in corrosivity were measured in terms of weight loss, polarization resistance, and pit depth on metal coupons suspended in the solutions during exposure.
Report Numbers
E 1.99:doe/cs/10510-t10
doe/cs/10510-t10
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Note
Published through SciTech Connect.
04/11/1980.
"doe/cs/10510-t10"
Diegle, R B; Beavers, J A; Salmons, L A.
Funding Information
AC04-79CS10510
View MARC record | catkey: 14461571