TY - GEN
T1 - Calcium carbonate formation on cross-linked polyethylene (PEX)
AU - Sanft, Patricia
AU - Francis, Lorraine
AU - Davidson, Jane
PY - 2005/12/1
Y1 - 2005/12/1
N2 - Accumulation of calcium carbonate (referred to as scale) on the inside surface of cross-linked polyethylene tubes in an isothermal, laminar water flow is compared to that on copper tubes. Copper and polymer tubes were placed one at a time in a flow-through system. Water with total calcium and carbonate concentration of 3x10-3 molar and a pH of approximately 9.1, yielding a supersaturation of 7.8, was pumped through the 7.62 cm long, 0.95 cm ID tubes at 0.07 m/s for 2.5, 5, and 7.5 hours. Sections of the tubes were analyzed at the designated time points to determine the extent of scaling. Results include scanning electron microscope images of the tube surfaces before and after exposure to the supersaturated, flowing water and chemical analysis to determine the mass of calcium carbonate per unit surface area. The data show that scaling of the cross-linked polyethylene is similar to that of copper.
AB - Accumulation of calcium carbonate (referred to as scale) on the inside surface of cross-linked polyethylene tubes in an isothermal, laminar water flow is compared to that on copper tubes. Copper and polymer tubes were placed one at a time in a flow-through system. Water with total calcium and carbonate concentration of 3x10-3 molar and a pH of approximately 9.1, yielding a supersaturation of 7.8, was pumped through the 7.62 cm long, 0.95 cm ID tubes at 0.07 m/s for 2.5, 5, and 7.5 hours. Sections of the tubes were analyzed at the designated time points to determine the extent of scaling. Results include scanning electron microscope images of the tube surfaces before and after exposure to the supersaturated, flowing water and chemical analysis to determine the mass of calcium carbonate per unit surface area. The data show that scaling of the cross-linked polyethylene is similar to that of copper.
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M3 - Conference contribution
AN - SCOPUS:84870557093
SN - 9781622762637
T3 - Proceedings of the Solar World Congress 2005: Bringing Water to the World, Including Proceedings of 34th ASES Annual Conference and Proceedings of 30th National Passive Solar Conference
SP - 1498
EP - 1503
BT - Proceedings of the Solar World Congress 2005
T2 - Solar World Congress 2005: Bringing Water to the World, Including 34th ASES Annual Conference and 30th National Passive Solar Conference
Y2 - 6 August 2005 through 12 August 2005
ER -
