The effects of water chemistry such as total dissolved solids, polyvalent metal ions, pH, and temperature on particulate iron oxide dispersion by a variety of polymeric additives have been investigated. The deposit control polymers (DCPs) evaluated include synthetic polymers (of varying composition and molecular weight). Results reveal that DCP iron oxide dispersant performance strongly depends on dosage and architecture (e.g., type and amount of monomers, monomer functional group ionic charge, molecular weight). Data show that pH changes cause varying but relatively small changes in DCP dispersant performance. The results also suggest that low levels of divalent and trivalent metal ions reduce DCP dispersant performance.

Subject
Acids, Water, Ions, Iron oxide, Materials performance, Sodium chloride, Water chemistry, Dispersants, Dosages, Dispersion, Ion concentrations, Polymers, Metals
Keywords:
iron oxide, dispersion, deposit control agents, mono-, di-, and trivalent metals effect
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2015
Association for Materials Protection and Performance (AMPP)
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