ZINC AMMONIUM CHLORIDE (solid, TRIPLE SALT)

GENERAL

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.

PRODUCT IDENTIFICATION

 

Zinc Ammonium Chloride solid Salt

Zinc Ammonium Chloride Triple Salt

CAS NO.

14639-97-5

14639-98-6

FORMULA

ZnCl2.2NH4Cl

ZnCl2.3NH4Cl

MOL WT.

243.27

296.76

APPLICATIONS

Galvanising Flux, Pre-flux, Flux

SPECIFICATION

PROPERTY

solid SALT

TRIPLE SALT

Appearance

Colourless to pale yellow crystals

ZnCl2

55.5% min

45% min

NH4Cl

42.5% min

51.0% min

Moisture

2.0% max

2.0% max

Fe

50ppm max

50ppm max

SO4

0.05% max

0.005% max

COMMENTS

 Packing : 25kgs in Bag