Materials corrosion in ammonia/solid heat pump working media

Technical Report · Wed Jan 01 00:00:00 EST 1992

DOI:https://doi.org/10.2172/10125265· OSTI ID:10125265

Wilson, D F; Howell, M; DeVan, J H

Salt/ammonia complexes will undergo thermal cycles during use as working media for heat pumps. The interaction between container materials and complexes under thermal cyclic conditions was assessed to screen possible containment materials. Aluminum alloys 3003, 1100, and 6063 and carbon steel A214 were tested against possible heat pump working media SrCl{sub 2}/NH{sub 3}, CaBr{sub 2}/NH{sub 3}, and CaCl{sub 2}/NH{sub 3}. None of the containment materials showed susceptibility to stress corrosion cracking. While all the materials demonstrated excellent general corrosion resistance to SrCl{sub 2}/NH{sub 3}, only A214 displayed good general corrosion resistance to CaCl{sub 2}/NH{sub 3}. The complex CaBr{sub 2}/NH{sub 3} was found to be subject to thermal cyclic instability and should not be used as a heat pump working medium.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10125265
• Report Number(s): ORNL/TM-12004; ON: DE92008649
• Resource Relation: Other Information: PBD: Jan 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
HEAT PUMPS
WORKING FLUIDS
MATERIALS TESTING
AMMONIA
CORROSIVE EFFECTS
ALUMINIUM BASE ALLOYS
CORROSION RESISTANCE
CARBON STEELS
STRONTIUM CHLORIDES
CALCIUM BROMIDES
CALCIUM CHLORIDES
STRESS CORROSION
THERMAL CYCLING
360105
320302
CORROSION AND EROSION
MATERIALS