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  Zinc phosphate
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  Zinc phosphate

1. Technical indicators

Executive standard
Test items
Qualified product
Premium product
Export grade
Whiteness
85-90
90-95
95
Zinc  %≥
43
46
48
Phosphate %≥
43
45
47
Oil absorption
25-35
25-35
25-35
pH value
5-8
5-7
5-7
Fineness (325 mesh)%
0.5
0.5
0.1
Moisture % ≤
1.5
1.5
1.5
 Cd  ppm ≤
 
 
10
 Cu  ppm ≤
 
 
10
 Hg  ppm ≤
 
 
5
 Pb  ppm ≤
 
 
20
 As  ppm ≤
 
 
5
 Mn  ppm ≤
 
 
20

    




 

 

 








 

2. Feature description
        Molecular formula: Zn3(PO4)2
        Molecular weight: 386.11
        CAS number : 7779-90-0
        Physical and chemical properties: colorless orthorhombic crystal or white microcrystalline powder, easy to deliquescence, insoluble in water. The apparent density is 0.8~1g/cm3. Soluble in inorganic acid, sodium hydroxide, ammonia water, ammonium salt solution. Insoluble in water, ethanol. Easily soluble in inorganic acid and sodium hydroxide solution. When heated to 100°C, it loses two crystal waters and becomes anhydrous. Deliquescent. Zinc phosphate is a white, non-toxic and pollution-free anti-rust pigment. It can effectively replace traditional anti-rust pigments containing heavy metals such as lead and chromium. It is a new product of anti-rust pigment with ideal application effect. Zinc phosphate has a strong complexing ability for ferric ions. Phosphate ions react with the iron anode to form a complex protective film with iron phosphate as the main body. This dense purification film is insoluble in water, has high hardness, excellent adhesion and excellent anti-rust performance. Due to the good activity of the zinc phosphate gene, it can react with many metal ions to form complexes. Therefore, it has a good antirust effect.

3. Purpose
        1. Zinc phosphate does not contain heavy metals such as lead and chromium, is non-toxic, non-polluting, and has no stimulating effect on the skin. Good thermal stability, good rust resistance, strong rust resistance, and because it is white, it can be colored according to needs. The supporting topcoat can be unlimited, which can simplify the painting and coating process, reduce the unit cost of coating and reduce environmental risks.
        2. The coating prepared with zinc phosphate has excellent anti-rust performance and water resistance. It is used in various paint-based coatings to prepare various water-resistant, acid-resistant and anti-corrosion coatings, such as: phenolic paint, epoxy paint , Acrylic acid paint, alkyd paint and water-soluble resin paint, widely used in antirust paint for ships, steel frame structures, automobiles, containers, industrial machinery, light metal, household appliances and metal containers for food.
        3. This product can be used as the base material of various coatings such as alkyd, phenolic, epoxy, etc., and can also be used as non-toxic anti-rust pigments, anti-rust coatings and water-soluble coatings.
        4. In addition, it can also be used as a bonding and sintering additive in the production of chlorinated rubber and flame retardants for synthetic polymer materials, electronics, low-temperature glass, and transparent ceramics.


25Kg zinc phosphate package

 
 
 
 
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