ZINC AMMONIUM CHLORIDE
(solid, TRIPLE
SALT)
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GENERAL
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A flux is used to remove oxide films, promote wetting, and prevent reoxidation
of the surfaces during heating. Zinc Ammonium Chloride is used to prepare the flux bath which cleaned iron or steel, usually in sheet form, is passed
throughe before
going through the galvanizing itself. Intermetallic compounds of iron and zinc are formed on the surface of the steel
or iron being treated by heating it in the presence of finely divided zinc below
the melting point of the zinc. In another, molten zinc is applied in a fine
spray to the surface of the cleaned iron or steel; the zinc adheres tightly to
the surface, which ccalls hot-dip process.
Commercially solid and triple salt of Zinc Ammonium Chloride
are used mainly. |
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PRODUCT
IDENTIFICATION
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Zinc Ammonium Chloride
solid Salt |
Zinc Ammonium Chloride
Triple Salt |
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CAS
NO.
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14639-97-5 |
14639-98-6 |
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FORMULA
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ZnCl2.2NH4Cl |
ZnCl2.3NH4Cl |
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MOL
WT.
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243.27 |
296.76 |
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APPLICATIONS |
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Galvanising Flux, Pre-flux,
Flux |
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SPECIFICATION
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PROPERTY
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solid
SALT
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TRIPLE
SALT
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Appearance
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Colourless to pale yellow
crystals |
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ZnCl2
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55.5%
min
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45%
min
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NH4Cl
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42.5%
min
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51.0%
min
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Moisture
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2.0%
max
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2.0%
max
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Fe
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50ppm
max
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50ppm
max
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SO4
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0.05%
max
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0.005%
max
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COMMENTS
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Packing
: 25kgs in Bag
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