Add time:08/10/2019 Source:sciencedirect.com
The chemical products generated in the reaction between Sodium monofluorophosphate (cas 12331-99-6) 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 (Ca5(PO4)3(OH,F)) were also profiled. In a medium of high alkalinity such as the tested experimental conditions, PO3F2- is decomposed into PO43- and F− ions, placing its utility as a corrosion inhibitor for steel reinforcements in doubt.
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