Hexafluorozirconic acid
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3D model (JSmol)
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| ECHA InfoCard | 100.031.502 |
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CompTox Dashboard (EPA)
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| Properties | |
| F6H2Zr | |
| Molar mass | 207.230 g·mol−1 |
| Appearance | white solid[1] |
| soluble[1] | |
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| H290, H301, H311, H314, H331 | |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Hexafluorozirconic acid is an inorganic compound with the chemical formula H2ZrF6. It is a white solid.
Preparation
Hexafluorozirconic acid can be prepared by treating zirconium(IV) oxide with hydrofluoric acid.[1] White crystals form upon evaporation of the solution.
Uses
Hexafluorozirconic acid can be used in sealing treatments for phosphated steel. A dilute solution of trimethoxymethylsilane, with enough H2ZrF6 to bring the pH down to about 4, is reported to perform better than a chromate rinse.[3] A nickel and chromium(VI) free treatment system for steel and galvanized steel is carried out by washing with an alkaline cleaner, rinsing, treating with hexafluorozirconic acid, rinsing, and then sealing with a solution of epoxy phosphate.[3]
References
- ^ a b c Ramanathan, E.; Balasubramanian, S. (2016-10-25). "Synthesis and characterization of hexafluorozirconic acid powder and its application in nanoceramic coating". Surface and Coatings Technology. 304: 228–236. doi:10.1016/j.surfcoat.2016.07.009. ISSN 0257-8972.
- ^ "ECHA CHEM". chem.echa.europa.eu. Retrieved 2026-03-16.
- ^ a b Wicks, Zeno W.; Jones, Frank N.; Pappas, S. Peter; Wicks, Douglas A. (2007-01-10). Organic Coatings: Science and Technology (1 ed.). Wiley. p. 144. doi:10.1002/9780470079072.ch7. ISBN 978-0-471-69806-7.
Further reading
- Khun, N.W.; Frankel, G.S. (November 2015). "Composition and corrosion protection of hexafluorozirconic acid treatment on steel". Materials and Corrosion. 66 (11): 1215–1222. doi:10.1002/maco.201508255. ISSN 0947-5117.