Pure Zinc Powder [-325+400]

Why mesh cut matters for thermal spray zinc

The -325+400 designation defines a narrow particle band: powder passes through a 325-mesh screen (approx. 44 µm) but is retained on a 400-mesh screen (approx. 37 µm). This tight cut reduces oversize particles that can cause spitting or nozzle blockages, and minimises undersize fines that drift or oxidise prematurely in the flame. For corrosion-protection coatings on structural steel, bridge components, or marine fabrications, a consistent particle window translates directly into deposit efficiency and coating uniformity.

Process compatibility and typical use

Pure zinc powder in this mesh range is compatible with combustion flame spray, plasma spray, and HVOF systems, subject to gun configuration and parameter optimisation. It is primarily selected for anodic corrosion protection: the zinc coating sacrifices itself to protect the steel substrate, a principle widely used in infrastructure, offshore, and industrial maintenance painting programmes. The powder can also serve as a bond coat or restoration layer where galvanic protection is required.

Pack options that protect powder integrity

SPA2Z packs Pure Zinc Powder [-325+400] in 5 kg tins, 10 kg tins, and 25 kg pails. Each container is sealed against moisture ingress and labelled with grade, mesh cut, and lot reference. If your operation runs through high volumes, ask about bulk pack configurations or scheduled call-off supply during the quotation stage.

About SPA2Z — Pure Zinc Powder [-325+400]

SPA2Z supplies thermal spray powders alongside a full range of surface preparation and blasting equipment, which means we understand how powder behaviour at the gun connects to the blast profile on the substrate. When you enquire about Pure Zinc Powder [-325+400], our team can discuss mesh verification, pack sizing, and compatibility with your existing spray setup—whether you are running a single flame gun in a fabrication yard or multiple plasma rigs in a coating shop.

We work with contractors, engineering maintenance teams, and distributors who need repeatable coating quality without chasing multiple vendors for powder, spares, and abrasives. Every quotation is prepared against your target specification and volume, so you get a commercial offer that fits the job rather than a one-size-fits-all listing.