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home products Zinc Phosphate Powder

Zinc Phosphate Powder

Product Details:

Place of Origin India
Keywords Inorganic Salts, Zinc Phosphate Powder, , NOIDA CHEMICALS, India
Category Chemicals > Inorganic Chemicals >Inorganic Salts
Payment Terms
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Detailed Product Description


 

CHEMICAL NATURE

This Pigment is essentially ZINC PHOSPHATE Dihydrate and corresponds to the formula Zn3(PO4)2 . 2H 2 O. It is a white, non toxic Pigment and is prepared by precipitation.

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TYPICAL CHEMICAL ANALYSIS IS GIVEN BELOW :

CHARACTERISTICS

ANALYTICAL DETAILS

Description

White, Micro-Crystalline Powder

Chemical Formula

Zn3 (PO4)2 . 2H2O

Residue on Sieve of 240 Mesh

0.5 % Max

Specific Gravity

3.3

Bulk Density

0.6 to 0.9 G/ML

Oil Absorption

19 ± 2 Gm of Oil per 100 Gm of Pigment

Loss on Ignition

8.5 to 10 % by Mass

Matter soluble in water

0.5 % Max

Zinc content of Ignited sample

50.5 to 52.0 % by Mass

 

 

  COLOUR

ZINC PHOSPHATE is white in appearance and of low opacity, making it adaptable to wide range of colours, by incorporating other pigments.

 

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NON-TOXICITY

Both red lead and calcium plumbate pigments are toxic. This not only limits their usage, but means that they can only be sprayed with elaborate precautions. Primers containing ZINC PHOSPHATE are not toxic.

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PERFORMANCE

Standard corrosion control tests can be misleading when evaluating the performance of ZINC PHOSPHATE-based Primers. The Girder Test and performance are more reliable guides.

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APPLICATIONS

It is compatible with a vide variety of media including alkyds epoxy esters, chlorinated rubber, polyurethene etc. Due to its slight solubility ZINC PHOSPHATE reacts by polarising both anodic and cathodic areas. The Pigment also physically prevents passage of water and salts. Thus the corrosion resistance characteristics of ZINC PHOSPHATE Pigment factors.

ZINC PHOSPHATE is used in corrosion resisting primers and undercoats. Good brushing characteristics can be obtained with ZINC PHOSPHATE Primers, which are suitable for both airless and conventional spray application. None of these methods entails a health hazard.

In contrast with the majority of red lead primers which are formulated in slow drying oils, it is now possible to formulate a 2-hour overcoatable paint based on ZINC PHOSPHATE, without detriment to its anti-corrosive properties.

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MECHANISM OF CORROSION PROTECTION

A number of explanations have been put forward about the effectiveness of ZINC PHOSPHATE in inhibiting rust formation. Among these are suggestions that it reduces the diffusion rate of ammonium ions through paint film, that it slowly phosphates the metal surface, rendering it passive, or that, as a result of complex formation between ZINC PHOSPHATE and the media, a highly stable film is produced.

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ADVANTAGES

ZINC PHOSPHATE has the advantage of bright white colour and non toxic nature over other Corrosion Resistant Pigments much as Zinc Chromate, Zinc Tetroxy Chromate and Barium Chromate.

The use of ZINC PHOSPHATE in Primers promotes excellent inter-coat adhesion, particularly under conditions of high humidity.

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COST

The lower price of ZINC PHOSPHATE relative to that of red lead on a volume basis, could contribute significantly to savings in manufacturing costs. Paint systems incorporating ZINC PHOSPHATE Primers are generally comparable in cost to those utilising other types of primer.

 

 



Zinc Phosphate Powder

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