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3D Printing、MIM、HIP、Brazing、Spraying、Porous material、PM
Zinc-aluminum alloy powder · Zn-Al alloy powder
Chrome-free Dacromet coating · Powder zinc impregnation · Specialized for zinc-based brazing alloys ZnAl5 ~ ZnAl50 · -100 mesh to -400 mesh
Process Advantages
High-alloy purity
Prepared by non‑vacuum atomization, the alloy exhibits uniform composition and low impurity levels, ensuring consistent performance between the coating and the brazed joint.
High sphericity · Controllable particle size
Spherical or near-spherical particles with excellent flowability and a narrow particle size distribution, available in a range from 100 mesh to 400 mesh, and can be custom‑sieved.
Ingredients are flexibly adjustable.
A wide range of grades from ZnAl5 to ZnAl50 is available, with an extensive aluminum content spectrum, and we support customers’ customized compositional requirements.
Eco-friendly · High-performance
Core raw material for chromium-free Dacromet coating, replacing traditional chromate passivation; environmentally compliant and offering excellent corrosion resistance.
Product Real-World Photos & Microscopic Morphology
SEM of zinc-aluminum alloy powder
Spherical or near-spherical particles with a uniform particle size distribution and excellent flowability.
Real-life photos of the powder
Gray powder, packaged in vacuum-sealed aluminum foil bags or plastic bottles, with batch traceability.
Zinc-aluminum coating/brazed parts
Chrome-free Dacromet coating, anti-corrosion for steel structures, zinc-based brazed joints
Zinc-aluminum alloy powder: functional zinc–aluminum-based alloy powder
Zinc–aluminum alloy powder is an important functional powder material within the zinc–aluminum binary alloy system. Using a non‑vacuum gas atomization process, high‑purity zinc and aluminum ingots are melted and atomized under inert gas protection, yielding alloy powders with uniform composition, excellent sphericity, and controllable particle size. The product range encompasses seven standard grades, from ZnAl5 to ZnAl50, covering a broad aluminum content spectrum to meet the requirements of diverse application scenarios. It is widely used in:
- Chrome-free Dacromet coating — An environmentally friendly, highly corrosion‑resistant zinc‑aluminum coating (using flake‑type zinc‑aluminum powder as the raw material), serving as an alternative to conventional chromate passivation;
- Powder zinc diffusion — Zinc‑diffusion coating for corrosion protection of steel structural components, used in railways, bridges, automobiles, ships, and other sectors;
- Zinc-based brazing filler metal — ZnAl5 eutectic brazing filler metal is used for brazing pure zinc and zinc alloys; ZnAl15 is suitable for general-purpose brazing of aluminum–aluminum and aluminum–copper joints, offering excellent wettability and superior mechanical properties.
Chemical Composition (wt%, multiple grades)
| Grade | Zn | Al | Total impurities ≤ |
|---|---|---|---|
| ZnAl5 | Bal. | 3-7 | 0.2 |
| ZnAl10 | Bal. | 8-12 | 0.2 |
| ZnAl15 | Bal. | 13-17 | 0.2 |
| ZnAl20 | Bal. | 18-22 | 0.2 |
| ZnAl30 | Bal. | 28-32 | 0.2 |
| ZnAl40 | Bal. | 38-42 | 0.2 |
| ZnAl50 | Bal. | 48-52 | 0.2 |
Key Particle Size Specifications & Physical Properties
| Particle size specification | Corresponding mesh count | D50 range (μm) | Loose packing density (g/cm³) | Tap density (g/cm³) | Flowability (s/50g) | Typical Applications |
|---|---|---|---|---|---|---|
| -100 mesh | ≤150μm | 80-120 | ≥3.0 | ≥4.0 | ≤28 | Powder zinc diffusion, coarse powder coating, preformed brazing filler metal |
| -200 mesh | ≤75μm | 45-70 | ≥3.2 | ≥4.2 | ≤26 | Zinc-aluminum coating (Dacromet), brazing paste raw materials |
| -300 mesh | ≤48μm | 30-45 | ≥3.4 | ≥4.4 | ≤25 | Fine coatings, flake zinc-aluminum powder raw material, fine brazing |
| -400 mesh | ≤37μm | 20-35 | ≥3.5 | ≥4.5 | ≤24 | Ultra-thin coating, MIM injection, fine solder paste |
* The above values represent typical ranges; specific figures may vary slightly depending on the grade and particle size. Other particle sizes are available upon request.
Typical application areas
Chrome-free Dacromet coating
An environmentally friendly, highly corrosion‑resistant zinc‑aluminum coating that serves as an alternative to chromate passivation, used for the anti‑corrosion protection of steel structures in automotive, railway, bridge, and port applications.
Powder zinc diffusion
Zinc‑diffusion treatment of steel structural components enhances their resistance to atmospheric corrosion and is suitable for fasteners, pipelines, and hardware.
Zinc-based brazing filler metal
ZnAl5 eutectic brazing filler metal is used for welding zinc alloys; ZnAl15 is used for aluminum–aluminum and aluminum–copper brazing.
Automotive parts
Anti-corrosion coatings and brazed joints for brake systems, chassis components, engine mounts, and more.
Ships/Ports
In marine atmospheric environments, the steel structure’s anti-corrosion coating exhibits excellent salt-spray resistance.
Railway system
Long-term anti-corrosion protection for railway sleepers, fasteners, and bridge steel structures
Zinc-based brazing filler metal recommendations (ZnAl5 / ZnAl15)
| Grade | Al content (%) | Solidus (°C) | Liquidus temperature (°C) | Recommended Brazing Temperature (°C) | Applicable base material |
|---|---|---|---|---|---|
| ZnAl5 | 3-7 | 382 | 382 | 400-450 | Pure zinc, zinc alloy |
| ZnAl15 | 13-17 | 425 | 460 | 470-520 | Aluminum–aluminum, aluminum–copper |
* ZnAl5 is an eutectic brazing alloy with a constant melting temperature; ZnAl15 exhibits a broader melting range, making it suitable for filling gaps of varying thicknesses.
Comparison between ZnAl Coating and Pure Zinc Coating
| Performance Item | ZnAl alloy coating | Pure zinc coating |
|---|---|---|
| Salt Spray Resistance Time (h) | Better | Good |
| Coating density | More dense, with low porosity. | General |
| Cathodic protection lifespan | Longer | Medium |
| Environmental friendliness | Chrome-free and harmless | Chrome-free |
ZnAl alloy coatings outperform pure zinc coatings in corrosion resistance and overall protective performance, making them the mainstream choice for modern anti-corrosion coatings.
End-to-end testing capability
Each batch of zinc–aluminum alloy powder is tested for major elements (Zn, Al), impurity content, particle size distribution, oxygen content, flowability, and bulk/ tapped density. A Certificate of Analysis (COA) is provided.
Packaging & Delivery
Powder packaging
Vacuum-sealed in a double-layer aluminum foil pouch (to prevent oxidation), with an outer iron or plastic drum.
Specifications: 1 kg, 5 kg, 10 kg, 25 kg, 50 kg per drum
Export packaging
Export orders are packed in wooden crates or pallets and reinforced to protect against moisture and impact.
Compatible with sea freight, air freight, and international express delivery.
Delivery time
Standard particle sizes are in stock; shipment will be arranged within 2–5 days after order confirmation.
Customized particle size or composition: 5–15 days
Batch Traceability
For each batch, a sample is retained, and the COA report is shipped with the goods.
Supports third-party testing (e.g., SGS)
Free sample
Free samples are provided for process validation.
Small-batch samples; bulk supply upon quality confirmation.
Customized Services
Custom particle size and custom aluminum content ratio
Meets special operating conditions and equipment requirements
Shipping documents
COA, MSDS, ingredient list, packing list
Meets export customs clearance requirements and customer in-plant inspection standards.
Technical Support
Provide guidance on coating, zinc‑diffusion, and brazing process parameters.
Assist in resolving issues encountered during use.
Inquire Now for Free Samples
Fill out the form on the right or contact us directly; we will provide product samples, technical data sheets, and price quotes to help you quickly complete your additive manufacturing process validation.
Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
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Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
