Calcium carbonate formation on cross-linked polyethylene (PEX)

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish (US)
Title of host publicationProceedings of the Solar World Congress 2005
Subtitle of host publicationBringing Water to the World, Including Proceedings of 34th ASES Annual Conference and Proceedings of 30th National Passive Solar Conference
Pages1498-1503
Number of pages6
StatePublished - Dec 1 2005
EventSolar World Congress 2005: Bringing Water to the World, Including 34th ASES Annual Conference and 30th National Passive Solar Conference - Orlando, FL, United States
Duration: Aug 6 2005Aug 12 2005

Publication series

NameProceedings 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
Volume2

Other

OtherSolar World Congress 2005: Bringing Water to the World, Including 34th ASES Annual Conference and 30th National Passive Solar Conference
CountryUnited States
CityOrlando, FL
Period8/6/058/12/05

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