Zinc ammonium chloride
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IUPAC name diammonium tetrachlorozincate(2-) | |
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Properties | |
Chemical formula | Cl4H8N2Zn |
Molar mass | 243.26 g·mol−1 |
Density | 1.91 g/cm3 |
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Danger | |
Hazard statements | H302, H314, H315, H400, H411 |
Precautionary statements | P260, P264, P270, P273, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P332+P313, P362, P363, P391, P405, P501 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references |
Zinc ammonium chloride is the inorganic compound with the formula (NH4)2ZnCl4. It is the ammonium salt of tetrachlorozincate. It used as a flux in the process of hot-dip galvanizing.[1][2][3]
Uses
Steel to be galvanized passes through an acidic cleaning process to remove iron oxide "mill scale". After this process, the surface of the steel is very active and oxide layers begin forming immediately upon exposure to the atmosphere. Zinc ammonium chloride flux in aqueous solution is applied to the steel to reduce any oxides that are formed and/or inhibit them from forming altogether. This allows the molten zinc in the proceeding galvanizing step to maximally adhere to and alloy with the surface of the steel.[4][5]
Precautions
Zinc ammonium chloride is a Class 9 hazardous material (Miscellaneous) according to the U.S. DOT.
References
- ^ Zinc Ammonium Chloride Archived 2017-11-16 at the Wayback Machine
- ^ Vulte, H.T. (1902). Laboratory Manual of Inorganic Preparations. Read Books. p. 72. ISBN 1408608405.
- ^ Hironori Matsunaga (1982). "X-Ray Structural Study of the Successive Phase Transitions in Ammonium Tetrachlorozincate, (NH4)2ZnCl4. I. Crystal Structure Determination". J. Phys. Soc. Jpn. 51 (3): 864–872. Bibcode:1982JPSJ...51..864M. doi:10.1143/JPSJ.51.864.
- ^ "The Hot-Dip Galvanizing Process". V&S Hot Dip Galvanzing.
- ^ "Galvanizing Fluxes". Zaclon LLC.
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monatomic anions |
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oxyanions |
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other anions |
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- Aluminon
- Ammonium acetate
- Ammonium adipate
- Ammonium benzoate
- Ammonium bituminosulfonate
- Ammonium carbamate
- Ammonium citrate
- Ammonium diethyl dithiophosphate
- Ammonium ferric citrate
- Ammonium formate
- Ammonium fumarate
- Ammonium glutamate
- Ammonium lactate
- Ammonium lauryl sulfate
- Ammonium malate
- Ammonium nonanoate
- Ammonium oxalate
- Ammonium picrate
- Ammonium perfluorononanoate
- Ammonium propionate
- Ammonium thioglycolate
- Cupferron
- Ferric ammonium oxalate
- Murexide