Zinc powder is a versatile Metal powder for anti-corrosion coatings, chemical processes and selected battery applications. It is available in a range of particle sizes. Particularly fine grades with particles measuring just a few micrometres are often used as Zinc dust is referred to as.
Processing methods and potential applications vary depending on particle size, particle shape and purity. Zinc powder can, for example, be used as a functional pigment in protective coatings, as a reducing agent or as a raw material for electrodes.
Technical specifications and powder grades
- Material: Metallic zinc (Zn) in powder form.
- Grain size: A range of particle sizes, down to fine zinc dust with particles measuring just a few micrometres.
- Grain shape: Depending on the type, they are spherical or platelet-shaped, also known as flakes.
- Functional characteristics: Electrochemical protection for steel, as well as chemical reactivity for reduction and battery applications.
When selecting materials, factors such as the particle size distribution, the zinc content, the surface condition and any alloying elements are all relevant.
Uses of zinc powder
Corrosion protection for steel and iron materials
One important area of application is the Surface coating using zinc-rich primers and protective coatings. Zinc plays an active protective role in this process: it oxidises preferentially and can thus protect the underlying steel from corrosion. This principle is known as cathodic corrosion protection.
This requires sufficient electrical contact between the zinc particles and the steel substrate. The protective effect therefore also depends on the formulation, the binder and the surface preparation. Flake-shaped zinc pigments can also help to enhance the barrier effect within the coating system.
The chemical industry and reduction processes
Zinc powder is used as a reducing agent in various chemical manufacturing processes, such as organic synthesis. Its particle size and surface properties influence its reaction behaviour. The appropriate powder grade depends on the specific process and the requirements regarding purity and reactivity.
Batteries and energy storage
Specially formulated zinc powders are used as anode material in alkaline batteries and zinc-air batteries. During discharge, the zinc is oxidised, thereby helping to supply electrical energy.
Alloyed zinc powders are frequently used for these applications; their composition, particle size and purity are tailored to the cell design. A powder intended for anti-corrosion paints therefore does not automatically meet the requirements of a battery application.
Powder metallurgy, alloys and brazing applications
Zinc can be used as a component in metallic powder mixtures and in the production of alloys. A well-known example is copper-zinc alloys such as Brass.
The same applies to the Hard and soft soldering Zinc-based alloys play a role here. Whether elemental zinc powder or a ready-mixed solder powder is required depends on the materials to be joined and the brazing process.
Choose the right zinc powder for the application
Coatings require different properties to those needed for chemical reactions or electrodes. Whilst integration into the coating system is crucial for protective coatings, battery and chemical applications require a precise balance between composition, surface properties and reactivity.
NMD Metalpowders supports you with tailor-made powder solutions when selecting a suitable specification.
Sustainability and material efficiency
Zinc-based corrosion protection systems can extend the service life of steel components and thereby reduce the need for repairs or replacement. Furthermore, zinc can be recovered using suitable recycling processes. The options available depend on the application, the material composition and the collection of residual materials.
Enquire about zinc powder at NMD Metalpowders
Whether for corrosion protection, chemical processes or battery applications, zinc powder offers a wide range of uses. It is essential to choose a powder whose purity, particle size and particle shape are suited to your process.
NMD Metalpowders combines many years’ experience in the metal powder industry with an international network of suppliers.
We can advise you on the choice of materials and handle the professional procurement process in line with your technical requirements and the quantities you require.
Enquire about zinc powder now and get personalised advice.
