Quick Search
CAS NO:7779-90-0
EC NO:231-944-3
Zinc phosphate is an inorganic compound with the formula Zn3(PO4)2)(H2O)4. This white powder is widely used as a corrosion resistant coating on metal surfaces either as part of an electroplating process or applied as a primer pigment (see also red lead).
Zinc phosphate has largely displaced toxic materials based on lead or chromium, and by 2006 it had become the most commonly used corrosion inhibitor.
Zinc phosphate coats better on a crystalline structure than bare metal, so a seeding agent is often used as a pre-treatment. One common agent is sodium pyrophosphate.
Properties
Chemical formula H4O12P2Zn3
Molar mass 454.11 g·mol−1
Appearance white solid
Density 3.998 g/cm3
Melting point 900 °C (1,650 °F; 1,170 K)
Solubility in water insoluble
Magnetic susceptibility (χ) −141.0·10−6
cm3/mol
Refractive index (nD) 1.595
Minerals
Natural forms of zinc phosphate include minerals hopeite and parahopeite. A somewhat similar mineral is natural hydrous zinc phosphate called tarbuttite, Zn2(PO4)(OH). Both are known from oxidation zones of Zn ore beds and were formed through oxidation of sphalerite by the presence of phosphate-rich solutions. The anhydrous form has not yet been found naturally.
Dentistry
Zinc phosphate dental cement is one of the oldest and widely used dental cements.
Zinc phosphate is commonly used for luting permanent metal and zirconium dioxide restorations and as a base for dental restorations.
Zinc phosphate cement is used for cementation of inlays, crowns, bridges, and orthodontic appliances and occasionally as a temporary restoration.
Zinc phosphate is prepared by mixing zinc oxide and magnesium oxide powders with a liquid consisting principally of phosphoric acid, water, and buffers.
Zinc phosphate is the standard cement to measure against.
Zinc phosphate has the longest track record of use in dentistry.
Zinc phosphate is still commonly used; however, resin-modified glass ionomer cements are more convenient and stronger when used in a dental setting.
Zinc phosphate coating is a crystallized conversion coating formed on the metal surface. The phosphate coating process is based on the chemical reaction between the metal and the weak acidic phosphate fluid to form insoluble phosphate crystals on the surface of the part.
Phosphate coating is used as a pretreatment before painting, to increase corrosion resistance and to provide a better adhesion surface for coating systems.
When used alone or with oil, the phosphate reduces the friction characteristics of the moving components or threaded parts. Although phosphate is generally referred to as a coating, since phosphate alone has a low rust resistance, it must be used in combination with oil or top lacquer applications in order to be used as a protection against corrosion.
Zinc phosphate can be applied to Ferrous metals, but it has no effect on Stainless Steel.
Advantages:
Provides corrosion resistance
Provides a good adhesion surface for Paint and Organic coatings
Reduction of friction coefficient when applied with oil
Zinc Phosphate is the type of phosphating which is suitable for metal parts which are required to provide high corrosion resistance.
Zinc Phosphate is the crystallized conversion coating.
Zinc Phosphate can be applied as fine grained and coarse grained and is the type of coating commonly used for equipment used in bad outdoor conditions before powder coating and electro-coating.
Zinc Phosphate Coating Process Flow Chart
Pre-treatment:
Product surface cleaning is provided in pretreatment.
Activation:
Before the coating process, the product surface is activated and the products are prepared for coating.
Coating:
When the products are immersed in the bath, the metal surface is coated with phosphate.
Lubrication:
Protective oil applications can be performed in order to improve the corrosion resistance performance of the products
Zinc phosphate cements or polycarboxylate cements are still used for cementation of posts and crowns. They are generally supplied as a powder and a liquid and their physical properties are highly influenced by the mixing ratio of the components.
Zinc phosphate conversion coating gives a high level of corrosion resistance and provides a perfect foundation for subsequent coating or painting.
Zinc phosphate conversion coatings can be used on a wide range of metallic surfaces including galvanized steel, electrogalvanized steel, zinc-alloy-coated steel aluminium, zinc, cadmium, silver and tin.
-Application for preventing abrasion caused by friction before metal forming processes such as cold drawing, cold forging, deep drawing,
- Application for increasing paint adhesion before electrostatic powder coating and wet painting,
- Application for increasing wear resistance and corrosion resistance with protective lubrication.
Zinc phosphate coating products with accelerator system used for wire and tube drawing.
Zinc phosphate is suitable for immersion and continuous (in-line) use. Allows high speed drawing of carbon steel wires. Coating weight is in the range of 6-10 g/m2.
Zinc phosphate provides phosphate coating which is necessary in demanding cold forming works in the production of bolts, nuts, screws and similar fasteners. Iron concentration of the phosphating solution is monitored and controlled by air mixing system.
Industry Uses
Corrosion inhibitors and anti-scaling agents
Dyes
Paint additives and coating additives not described by other categories
Pigments
Plating agents and surface treating agents
Processing aids, not otherwise listed
Surface active agents
Consumer Uses
Agricultural products (non-pesticidal)
Industrial chemicals
Metal products not covered elsewhere
Paints and coatings
Plastic and rubber products not covered elsewhere
Water treatment products
used in products which are used as cleaners in plating processes, examples of final uses are automotive and machinery.
Industry Processing Sectors
All other basic inorganic chemical manufacturing
All other chemical product and preparation manufacturing
Fabricated metal product manufacturing
Miscellaneous manufacturing
Paint and coating manufacturing
Plastic material and resin manufacturing
Plastics product manufacturing
Printing and related support activities
Services
Synthetic dye and pigment manufacturing
Transportation equipment manufacturing
Utilities
Wholesale and retail trade
Zinc phosphates are applied on steel surfaces using solutions of zinc phosphate, phosphoric acid and activators. These proprietary chemical solutions deposit a crystalline coating of zinc phosphate during the application process. During the initial steps in the process, the metal is cleaned to remove oily soils. They can be applied cold or hot. Although viable, the cold processes are not widely used.
Zinc phosphate conversion coatings are widely used for increasing corrosion resistance and surface preparation for painting. This kind of treatment has recently been introduced in the field of reinforced concrete. However, the disadvantage in the use of such coatings is the existence of pores.
Zinc phosphating baths have constantly been developed and modified by additives in order to enhance the coating characteristics including the corrosion resistance and the alkaline stability.
Zinc phosphate cement the one of the oldest and widely used cements, and is commonly used for luting permanent metal restorations and as a base.
Zinc phosphate is a high-strength cement base, mixed from zinc oxide powder and phosphoric acid liquid.
Due to its low initial pH, it may cause pulpal irritation, especially where only a thin layer of dentin exists between the cement and the pulp; thus is especially important to follow the correct procedures and precautions when using zinc phosphate cement.
Zinc phosphate coating is commonly used for corrosion protection of metallic materials, mainly mild steel.
Zinc phosphate coating elevates the natural crystalline aesthetics of hot dipped galvanized steel for decorative use.
Zinc phosphate is favoured for its natural, luxurious and stately ambiance and for the gray tones that settle over time.
Main Features
-External use possible
-Creates a natural tone that cannot be replicated with paint coat finishes
-Blends into surrounding atmosphere over time
The application of zinc phosphate coating results in a layer of insoluble, crystalline phosphates (1～20μ). The resulting porous layer is composed of hopeite, phosphophyllite and other zinc phosphate compounds that combine with the hot-dip galvanization coat through the following process.
1. The galvanized metal reacts with the solution, causing zinc from the material to elute into the solution.
2. Zinc reacts with the solution to form zinc phosphate compound.
3. The zinc phosphate compounds precipitate on the surface.
Zinc phosphate coating is roughly twice as corrosion resistant to hot-dipped galvanization, although the performance depends on the coating thickness.
As zinc phosphate coating is colourless, its gray tones are a result of reflections. This means that the coat is not affected by ultraviolet rays; absolving it from any concerns of weather resistance.
Zinc Phosphate is a moderately water and acid soluble Zinc source for uses compatible with Phosphates.
Zinc Phosphate is generally immediately available in most volumes.
Zinc Phosphate is a micronized white anti-corrosive pigment suitable for a wide range of different primer applications.
Zinc Phosphate is used to enhance paint adhesion and reduce corrosion
Zinc phosphate enhances paint adhesion by giving the paint something to bond to securely.
Zinc phosphate reduces paint-to-metal reactions and forms a barrier between the substrate and the paint.
Zinc phosphate also reduces general surface corrosion on metal substrates and reduces underfilm delamination in the event of damage to the paint film.
Zinc phosphate coatings typically serve as a base on steel for dry film lubricants, fluoroplymer coatings, metal flake coatings, or lubricating oils. They may also be used for dry lubrication to improve break-in or reduce galling.
Zinc phosphate coatings only provide minimal corrosion protection without additional treatment. Their crystalline structure enables dry films and other coatings to mechanically bond to the steel, greatly enhancing adhesion.
Zinc phosphate coatings are typically gray in color. For defense applications, this finish can reduce reflectivity of base materials.
Formula: Zn3P2
Molecular mass: 258.1
Boiling point: 1100°C
Melting point: 420°C
Density: 4.6 g/cm³
Solubility in water: none, slowly decomposes
Zinc phosphate coatings (Type Z) are also available and are mainly used for rust proofing on ferrous metals. They can be applied by immersion or spraying.
Zinc phosphate is a lighter alternative to manganese phosphate, while providing resistance to harsh elements that tend to wear products quickly. We offer both black zinc phosphate coatings and dark gray zinc phosphate coatings.
Zinc phosphate functions as both a chemical and a pigment. As a pigment it is used in a variety of applications including that of corrosion inhibiting paints.
Zinc phosphate is a corrosion inhibiting pigment suitable for a wide range of applications.
Zinc phosphate is an easily dispersed white powder with a low tinting strength.
Zinc phosphate (Zn3(PO4)2) is an inorganic chemical compound used as a corrosion resistant coating on metal surfaces either as part of an electroplating process or applied as a primer pigment (see also red lead).
Zinc phosphate coats better on a crystalline structure than bare metal, so a seeding agent is often used as a pre-treatment. One common agent is sodium pyrophosphate.
How to Make Zinc Phosphate?
Zinc Phosphate is prepared by mixing magnesium oxide and zinc oxide powders consisting of a liquid principally of water, phosphoric acid, and buffers.
Zinc Phosphate is one of the standard types of cement to measure against.
Zinc Phosphate has the longest track record of terms of dentistry. Still, it is commonly used, and however, the resin-modified glass ionomer types of cement are more stronger and convenient when used for dental settings.
Zinc Phosphate Uses
There are many of the Zinc Phosphate uses when considered, and a few of them are listed below.
Zinc phosphate (Zn3(PO4)2) is used in dentistry.
Zinc phosphate is used as a plating agent and as a surface treating agent as well.
Zinc phosphate is used in the production of rubber products.
Zinc phosphate is used as an anti-scaling agent.
Zinc phosphate is used in the preparation of dyes.
Zinc phosphate is used as a paint additive.
Zinc phosphate can be used as a corrosion inhibitor.
Zinc phosphate is used for water treatment products.
The Zn3(PO4)2 is an inorganic chemical compound having a chemical name Zinc Phosphate.
The other names for Zinc Phosphate are Zinc orthophosphate, Trizinc phosphate, and Trizinc diphosphate. This white powder compound is widely used as a corrosion-resistant coating, which is applied on the metal surfaces, which are put as a part of electroplating or as a primer pigment.
When compared to the bare metal, the trizinc phosphate coats better on a crystalline structure. Thus, a seeding agent like sodium pyrophosphate is used frequently as a pre-treatment.
Zinc phosphate has largely displaced toxic materials based on chromium or lead.
Zinc phosphate had become one of the most commonly used corrosion inhibitors by 2006. The common agent of this Zn3(PO4)2 is sodium pyrophosphate.
Zinc Phosphatizing is often used by aerospace manufactures and the military for equipment that may be exposed to severe environments.
Zinc Phosphates are also widely used in the automotive industry, the appliance and electronics industries, and the oil & gas industry.
Zinc Phosphates hold top coat layers of oil, lubricants and anti-corrosion waxes in extreme and hostile environments.
Zinc phosphate coatings are composed of a maze of crystals on steel surfaces and act as absorptive media for organic materials. These coatings find extensive use in the automotive, appliance, and building trade industries.
What is zinc phosphide?
Zinc phosphide is an inorganic compound that combines phosphorus with zinc.
Zinc phosphide is used in rodenticide baits. When an animal eats the bait, the acid in the animal's stomach turns the zinc phosphide into phosphine.
Phosphine is a very toxic gas. Phosphine is also released by aluminum phosphide and magnesium phosphide. These are used as fumigants in stored grain.
Zinc phosphide has been registered for use in pesticide products in the United States since 1947.
Features & Benefits
Anti-corrosive
Rapid drying
Use on iron
Use on Steel
Semi-Matt Finish
Zinc phosphate is an inorganic chemical compound consisting of zinc, phosphorous and oxygen with the chemical formula Zn3(PO4)2.
Zinc phosphate is commonly used as a corrosion inhibitor when applied to metallic surfaces.
Zinc phosphate is used to produce corrosion resistant coatings that are typically applied either as part of an electroplating process or as a primer pigment.
Zinc phosphate reacts moderately with water and is acid soluble with zinc sources, allowing it to have good moisture resistance and galvanic substitution properties. When used in a micronized form for pigmentation it is suitable for a wide range of primer applications.
Zinc phosphate is also a key component of zinc orthophosphate hydrate, which is a protective compound that is easy to disperse.
Zinc phosphate is low solubility behavior provides high compatibility with both solvent- and water-based resins.
Applications
For rubber to metal bonding
Uniform base for paint adhesion
Non-metallic crystalline coating for absorbing oil or wax
Protect parts from corrosion resulting from abrasion
Advantages
Nice black finish when applied over a pre-black
Good corrosion protection can be enhanced with chrome seal
Dry-to-touch lubricants can be added
Zinc Phosphate coatings are often used on steel parts to provide corrosion protection, lubricity, or as a pretreatment for additional coatings. The process converts the metal surface into a nonmetallic, polycrystalline coating, which has a black matte appearance.
Zinc Phosphate is a universal lead-free and chromium-free inorganic corrosion inhibitor designed for water-based and solvent-based coatings.
Zinc phosphide (Zn3P2) is a heavy, finely ground, crystalline gray-black powder that is practically insoluble in water and alcohol.
Zinc phosphide is used in the manufacturing of Zinc-rich, anti-corrosive paint primer systems
Zinc Phosphating produces a smooth, uniform coating that will most often be used as a carrier for lubricants, anti-corrosion waxes and paint.
Zinc phosphate is an inorganic chemical compound with the molecular formula Zn3(PO4)2, used as a corrosion resistant coating on metal surfaces and in special cements.
Properties
Chemical
Zinc phosphate reacts with strong acids to release phosphoric acid.
Physical
Zinc phosphate is an odorless white crystalline solid, practically insoluble in water (0.03 g/l), which melts at 900 °C.
Preparation
Zinc phosphate can be prepared by reacting phosphoric acid with zinc oxide. The reaction is exothermic and should be performed in a cooled container or glass slab.
Chemical Properties White powder.Soluble in acids and ammonium hydroxide; insoluble in water.
Uses
Dental cements; phosphors; conversion coating of steel, aluminum, and other metal surfaces.
Uses
Zinc phosphate (ZP), barium metaborate, and strontium chromate pigments are also common ingredients in corrosion-inhibiting coatings. Thin wash-inhibiting primers are often formulated with chromate or phosphate pigments that are introduced in a synthetic polymeric binder such as a vinyl chloride copolymer. The variety of inorganic corrosion-inhibiting pigments includes also lead carbonate, strontium chromate, zinc oxide, and Zinc phosphate.
Zinc phosphate (ZP) is the most commercially successful non-toxic inhibitive pigment used in paint formulations. Furthermore, the use of phosphates does not represent an excessive cost, and their application is even easier than other proposed alternatives for chromate pigments. This is the anticorrosive pigment most frequently used in paints. The massive use of nontoxic and environmentally acceptable Zinc phosphates developed an immense pressure for regulations that prohibited the use of red lead and chromated anticorrosion pigments. Experimental results suggest that Zinc phosphate and all phosphate-based pigments (zinc-aluminum polyphosphate, Zinc phosphate modified with organic corrosion inhibitor, etc.) exhibit improved anticorrosion efficiency when their concentration is increased.
About this substance
Helpful information
Zinc phosphate is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 10 000 to < 100 000 tonnes per annum.
Zinc phosphate is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.
Consumer Uses
Zinc phosphate is used in the following products: fillers, putties, plasters, modelling clay, coating products, adhesives and sealants, finger paints, metal surface treatment products, fertilisers, non-metal-surface treatment products and inks and toners.
Other release to the environment of Zinc phosphate is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.
Article service life
Other release to the environment of Zinc phosphate is likely to occur from: indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment), outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and outdoor use in long-life materials with high release rate (e.g. tyres, treated wooden products, treated textile and fabric, brake pads in trucks or cars, sanding of buildings (bridges, facades) or vehicles (ships)).
Zinc phosphate can be found in complex articles, with no release intended: vehicles and machinery, mechanical appliances and electrical/electronic products (e.g. computers, cameras, lamps, refrigerators, washing machines).
Zinc phosphate can be found in products with material based on: plastic (e.g. food packaging and storage, toys, mobile phones), metal (e.g. cutlery, pots, toys, jewellery), stone, plaster, cement, glass or ceramic (e.g. dishes, pots/pans, food storage containers, construction and isolation material), rubber (e.g. tyres, shoes, toys) and wood (e.g. floors, furniture, toys).
Widespread uses by professional workers
Zinc phosphate is used in the following products: fillers, putties, plasters, modelling clay, coating products, fertilisers, polymers, inks and toners and non-metal-surface treatment products.
Zinc phosphate is used in the following areas: building & construction work, formulation of mixtures and/or re-packaging and agriculture, forestry and fishing.
Zinc phosphate is used for the manufacture of: machinery and vehicles, furniture, fabricated metal products and plastic products.
Other release to the environment of Zinc phosphate is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.
Formulation or re-packing
Zinc phosphate is used in the following products: pH regulators and water treatment products, laboratory chemicals, pharmaceuticals, fillers, putties, plasters, modelling clay and metal surface treatment products.
Zinc phosphate has an industrial use resulting in manufacture of another substance (use of intermediates).
Release to the environment of Zinc phosphate can occur from industrial use: formulation of mixtures, manufacturing of the substance, in the production of articles, formulation in materials and as an intermediate step in further manufacturing of another substance (use of intermediates).
Other release to the environment of Zinc phosphate is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials).
Uses at industrial sites
Zinc phosphate is used in the following products: coating products, pH regulators and water treatment products, fillers, putties, plasters, modelling clay, metal surface treatment products, polymers and pharmaceuticals.
Zinc phosphate has an industrial use resulting in manufacture of another substance (use of intermediates).
Zinc phosphate is used in the following areas: formulation of mixtures and/or re-packaging.
Zinc phosphate is used for the manufacture of: chemicals, machinery and vehicles, electrical, electronic and optical equipment, mineral products (e.g. plasters, cement) and plastic products.
Release to the environment of Zinc phosphate can occur from industrial use: in the production of articles, as an intermediate step in further manufacturing of another substance (use of intermediates) and formulation of mixtures.
Manufacture
Release to the environment of Zinc phosphate can occur from industrial use: manufacturing of the substance, formulation of mixtures, as an intermediate step in further manufacturing of another substance (use of intermediates), in processing aids at industrial sites and in the production of articles.
Zinc phosphate is a non toxic white pigment featuring corrosion protection and adhesion capability.
Zinc phosphate is insoluble in water, soluble in acids and ammonium hydroxide.
Zinc phosphate is used in coatings for steel, aluminum, and other metals, and in dental cements and phosphors.
Zinc phosphate is used as a flame retardant also.
Zinc phosphate is an inorganic compound with the formula Zn3(PO4)2)(H2O)4. This white powder is widely used as a corrosion resistant coating on metal surfaces either as part of an electroplating process or applied as a primer pigment (see also red lead). It has largely displaced toxic materials based on lead or chromium, and by 2006 it had become the most commonly used corrosion inhibitor.
Zinc phosphate coats better on a crystalline structure than bare metal, so a seeding agent is often used as a pre-treatment. One common agent is sodium pyrophosphate.
Zinc phosphate uses and applications include: In dental cements; phosphors; flame retardant for plastics; rust-inhibitive pigment for primer paints; corrosion and scale control for potable water treatment; stabilizer in food packaging; in food packaging adhesives
Suggested storage of Zinc phosphate: Store in tightly closed containers in a cool, dry area
1. Property:
Zinc phosphate is an inorganic chemical compound used as a corrosion resistant coating on metal surfaces either as part of an electroplating process or applied as a primer pigment.
2. Usage:
Zinc phosphate is widely used in various coating materials for preparation of waterproof, acid-resistant or corrosion preventive coating materials such as phenolic paint, epoxy paint, acrylic paint, paste paint and water-soluble resin paint in the fields of ship,building, automobile,industrial machinery, light metal, household appliances and metal containers for foods
It can be widely used ib corrisive resistant coatings. The advantages:
1, toxicity free
2, Fast drying
3, Close connection with the surface
4, With a variety of base material with good, suitable for alkyd, phenolic modified alkyd, chlorinated rubber, epoxy and other amino resins can be used for water-based paint.
5, Color white, the refractive index is small, in addition the system can also be used outside primer coat, color convenience.
IUPAC names
Phosphoric acid, zinc salt (2:3)
trizinc bis(orhthophosphate)
Trizinc bis(ortho)phosphate
trizinc bis(orthophosphate
TRIZINC BIS(ORTHOPHOSPHATE)
Trizinc bis(orthophosphate)
trizinc bis(orthophosphate)
Trizinc bis(orthophosphate)
trizinc bis(orthophosphate)
Trizinc Diphosphate
Trizinc diphosphate
trizinc diphosphate
trizinc(2+) diphosphate
trizinc(2+) ion diphosphate
Zinc ortho-Phosphate
zinc phopsphate
Zinc phosphate
zinc phosphate
Zinc Phosphate
Zinc phosphate
zinc phosphate
SYNONYMS:
7779-90-0 [RN]
Phosphate de zinc (2:3) [French] [ACD/IUPAC Name]
Zinc phosphate
Zinc phosphate (3:2) [ACD/IUPAC Name]
Zinkphosphat (3:2) [German] [ACD/IUPAC Name]
PHOSPHORIC ACID ZINC SALT
ZINC PHOSPHATE TRIBASIC
ZINC PHOSPHATE (ORTHO)
ZINC PHOSPHATE
ZINC ORTHOPHOSPHATE
bonderite40
neutralzincphosphate
phosphinoxpz06
Phosphoricacid,zincsalt(2:3)
pigmentwhite32
sicorznp/m
sicorznp/s
tribasiczincphosphate
trizincdiphosphate
virchem931
weathercoat1000
zincacidphosphate
zincphosphate(3:2)
zincphosphatecement
zpf
zp-sb
trizinc bis(orthophosphate)
Zubc ogisogate tetagtdrate
Zincphosphate(ortho),Puratronic?,99.995%(metalsbasis)
ZINC PHOSPHATE 4 H2O
ZINC PHOSPHATE, 99.999%
ZINC PHOSPHATE, 1GM, NEAT
zinc phosphate (ortho), puratronic
Zinc phosphate hydrate, tech.
Zinc phosphate (ortho), Puratronic(R), 99.995% (metals basis)
znic phosphate
Zinc Phosphate (Ortho), Puratronic (Metals Basis)
Zinc phosphate dihydrate
Zinc phosphate hydrate, technical
Zinc phosphate tribasic tetrahydrate
Zinc phosphate 99.998% trace metals basis
Zinc phosphate(Technical)
