Zinc Dust - Zinc Powders,Zinc Metal Powder From Paintsrawmaterials

ORIGIN : MALAYSIA

GRADE :

STANDARD 5
STANDARD 7
SUPER FINE
SUPER EXTRA

PACKAGING : 50 KG DRUM

INTRODUCTION
Zinc dust is a pure metal powder, which is grey in colour and is produced by condensation of purified zinc vapors. The particle shape is spherical. Zinc dust is suitable for use in many binder formulations for the manufacture of zinc primers and shop primers, for example inorganic ethyl silicate and epoxy primers.
Zinc dust is preferred in major applications such as chemical industry, paint industry and metal extraction industry. Improved yields, faster reaction kinetics and consistent quality are inherent characteristics of distilled grade Zinc dust on account of their greater homogeneity and uniformly fine particles. The uniform particle size and spherical shape of the product provides the zinc rich paint formulations superior brushing qualities and improved suspension characteristics.

END APPLICATION

ZINC RICH PAINT
Zinc powder is used in zinc rich paint to protect steel surfaces from corrosion. Zinc-rich paint is an essential component of most heavy duty coatings, as used in the protection of major structures such as offshore oil rigs, steel bridges, petrochemical and powder industries. Other applications include the painting of sea containers and in the construction and maintenance of ships and marine equipment.
MECHANICAL PLATING
Zinc dust is extensively used in mechanical plating / galvanizing, whereby small steel parts (screws, fasteners, rivets, bolts) are coated with a uniform layer of zinc, providing enhanced corrosion protection without the introduction of Hydrogen embrittlement. Sherardizing is an application to put a zinc coating on small steel parts, this application is similar to Mechanical Plating but applies at higher temperature (380-450° C).
CHEMICAL APPLICATIONS
Zinc Powders are used in many chemical applications like Organo zinc in pharma, agro-chemistry and life-science applications, Recovery of gold & silver and PGM group metals (Merrill Crowe Process), Production of sodium or zinc hydrosulfite and of formaldehyde sulfoxylate, powerful reducing agents used for the bleaching of paper, textile or kaolin, Purification of leach solutions for the zinc metal production.

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PARTICLE SIZE
Particle diameter is determined by a standard test on all batches, using the Fisher Sub Sieve Sizer (air permeability method) which gives the average particle size. On request we can also supply the particle size distribution. We have 4 grades according to average particle size.

GRADES	FISHER SUB SIEVE SIZER (µm)
Super Extra	2.5 - 3.7
Super Fine	3.7-4.5
Standard 5	4.5 - 6.0
Standard 7	6.0 - 9.0

PARTICLE SHAPE
Zinc Dust supplied by us has the advantage of its spherical particle shape. Spherical shape Zinc Dust is produced by handful of companies & we are privileged to be its supplier. Use of our Zinc Dust in Zinc rich primer is advantageous as it spherical particle shape avoids blockage of spray gun enabling standard coating on the substrates which increases the life of the coating & also increases its anti corrosive property.

	STANDARD 7	STANDARD 5	SUPER FINE	SUPER EXTRA	TEST METHOD
Surface area : (cm²/g)	2.000	3.000	4.000	6.000	B.E.T. method
Average particle size	6.0 – 9.0	4.5 – 6.0	3.7-4.5	2.5 -3.7	Fisher Sub sieve Sizer (µm)
Oil absorption : g/100g	5.0	5.5	6.0	6.4	ISO 787/5
Packing density	3.8	3.5	3.0	2.5	ISO 787/11
Sieve analysis: +B.S. 325 mesh % (45µm)	0.05 (max.)	0.02 (max.)	0.01 (max.)	0.01 (max.)	ISO 3549/4
Specific gravity: (g/cm³)	7.1	7.1	7.1	7.1	ISO 787/10
Colour : Grey fine powder

CHEMICAL ANALYSIS	TYPICAL VALUE (%)	STANDARD SPECIFICATION	TEST METHOD
Total Zinc (%)	99.0	98.5 (Min.)	ISO 3549-part 6
Metallic Zinc (%)	95.0	94.0 (Min.)	ISO 3549-part 7
Lead (Pb) (%)	0.01	0.20 (Max.)	Atomic absorption
Cadmium (Cd) (%)	0.02	0.04 (Max.)	Atomic absorption
Iron (Fe) (%)	0.005	0.005 (Max.)	Atomic absorption
As,Sb,Mg,Mn,Al,S,Co,Ni,Ti and Ge	Trace	Trace	Atomic absorption

CHEMICAL ANALYSIS	TYPICAL VALUE (%)	STANDARD SPECIFICATION	TEST METHOD
Total Zinc (%)	>98.5	99	Calculation
Metallic Zinc (%)	>94	95 – 96	Gas Evolution
Lead (Pb) (%)	<0.01	0.007	Atomic absorption
Cadmium (Cd) (%)	<0.01	0.005	Atomic absorption
Iron (Fe) (%)	<0.005	0.001	Atomic absorption
As,Sb,Mg,Mn,Al,S,Co,Ni,Ti and Ge	<0.001	Traces	Atomic absorption

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