Aerospace · Auto parts · Wind & PV equipment parts
Where it is used
Zinc flake is the main raw material for zinc flake coatings, both zinc-chromium (Dacromet) and chrome-free zinc-aluminum systems. Compared with spherical zinc dust it offers better hiding power, leafing and barrier properties, and a brighter metallic luster. In the cured film the flakes lie parallel in overlapping layers, improving electrical contact between the zinc and the steel and between the flakes; the film is denser and the corrosion path longer, so less zinc is needed per unit area and the film can be thinner, while barrier protection and corrosion resistance both improve.
Why Welllink zinc flake
- A full range, made to order: available as dry powder or as a paste, and tailored to your process — alloy ratio, particle size, apparent density, flake thickness and solids content can all be specified.
- Refined process, broad compatibility: precision milling, classification and passivation coating are integrated in one process, giving an even aspect ratio and a narrow size distribution. After surface modification the powder has stable oil absorption, strong hiding power and excellent suspension and dispersion. Batch-to-batch variation is small, and it suits spray, dip and brush application alike.
- A dense film that performs: the flake structure overlaps layer upon layer as the film forms, building a labyrinth-like barrier with low porosity, strong adhesion and a full, fine metallic luster.
- Cleaner, with protection twice over: for the same level of protection, zinc flake is used in markedly smaller amounts than spherical zinc dust, saving zinc and fitting cleaner manufacturing. The staggered, overlapping flakes lengthen the path corrosive media must travel, and together with cathodic protection the two mechanisms reinforce each other, further improving corrosion resistance and film stability.