After comparative usage on marine projects, Zinga out-lasts hot-dip galvanizing by approximately 10% in marine conditions. In normal atmospheric conditions the two coatings are very similar in lifespan.
Zinga has been used to galvanize chains and bolts for marine use. Because each particle of zinc is protected by the organic binder it is able to resist abrasion. Zinga is also extremely flexible and will withstand tremendous distortion.
BNF (Fulmer laboratories) have done extensive atmospheric testing to compare Zinga with hot-dip and thermal-spray zinc. Also DNV in Norway have approved Zinga for use in the seawater ballast tanks of ships – one of the harshest environments possible. Please see the Reports section for details on these and all the other tests.
Zinga achieved NORSOK M-501 approval in April 2007 for use in the offshore Oil and Gas industry. This is commonly regarded as one of the toughest tests for coating systems and Zinga passed with the maximum score possible. Click here to read a copy of the report.
No. Steel can be coated with up to 60 microns of Zinga before welding.
Zinga has been given the following certification: (USA) MIL-P-26915A and also (NATO) 8030-13-113-7027. It has been used in Europe (Kosovo, Croatia etc) and also on the I-110 bridge over the Mississippi river in USA. Zinga was tested and approved by both the Senate and the Military because of the bridge’s significance as a major supply route. As previously mentioned Zinga has also been approved by the British Mod.
Yes. Zinganised steel can be MIG or arc welded to x-ray standard, with no porosity in the welds. Although obviously not quite as easy as welding un-coated steel, once the arc has formed the approaching weld bead is at a sufficiently high temperature to cause the binder to evaporate and the remaining zinc dust is removed from the zone by convection. Using a wire brush to remove the surface zinc oxides to reveal the zinc beneath before welding considerably improves the process.
Zinga can be coated with compatible epoxies, polyurethanes, chlorinated rubbers, vinyls and water-based coatings. Not everyone likes a grey colour! Please check the “Applying Zinga” page or contact the ZingaMetall for details.
Surface preparation is vital. Decontamination followed by a grit-blast to Sa 2.5, with a blast-profile of Rz 50-80mm and a roughness of Ra 12.5-15mm is the standard requirement. Please contact ZingaMetall to ensure the right surface preparation is achieved for any particular application.
Firstly, zinc silicates are two-component products. Zinga is a single-component. Secondly, zinc-silicates require an SA 3 standard of cleanliness, while Zinga will work on an SA 2.5 very comfortably. Thirdly, the surface has to be absolutely dry before applying a zinc-silicate, or it cures at the interface before it cures throughout the coating. Zinga goes onto slurry-blasted surfaces soon after the blasting has stopped and the surface has been air dried whilst the surface is still mildly damp. Lastly, but most importantly, Zinga is an active coating providing the same galvanic voltage as Hot Dip Galvanising.