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Reaction between sodium monofluorophosphate and portlandite and impact on steel reinforcement corrosion inhibition

AuthorsIglesia, A. la ; La Iglesia, V. M.; Fajardo, S.; Gómez, P. P.; Bastidas Rull, José María
Issue Date2012
CitationConstruction and Building Materials 37: 46- 50 (2012)
AbstractThe chemical products generated in the reaction between sodium monofluorophosphate and cement paste, simulated by a calcium hydroxide solution, were analysed using X-ray diffraction and transmission electron microscopy with energy dispersive X-ray analysis. Portlandite, apatite, fluorite, calcite and amorphous products were identified as the main synthesized phases. Nanoparticles of hydroxyfluoroapatite (Ca 5(PO 4) 3(OH,F)) were also profiled. In a medium of high alkalinity such as the tested experimental conditions, PO 3F 2- is decomposed into PO43- and F - ions, placing its utility as a corrosion inhibitor for steel reinforcements in doubt. © 2012 Elsevier Ltd. All rights reserved.
Identifiersdoi: 10.1016/j.conbuildmat.2012.07.031
issn: 0950-0618
Appears in Collections:(CENIM) Artículos
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