Thermal Spraying Zinc (TSZ, TSA) more commonly known as ‘Metal Spraying’ is an anti-corrosion protection system which is used to extend the service life of another material.
Grade2 IMPACT use modern flame spray technology for application of 3 specific materials – pure zinc, aluminium or zinc/aluminium alloy metal wire.
Zinc & Aluminium are the two most commonly used materials for corrosion protection. The third least common is zinc/aluminium alloy which is generally used in environments where corrosion resistance of zinc is borderline.
In this thermal spray process, the pure wire is melted using a precisely measured oxy-propane system, atomised using compressed air and sprayed in molten form onto a grit-blasted substrate. Upon contact, the particles flatten onto the surface, freeze and mechanically bond, firstly onto the roughened substrate and then onto each other as the coating thickness is increased.
As the heat energy in the molten particles is small relative to the size of the sprayed component, the process imparts very little heat to the substrate. As the temperature increase of the coated parts is minimal, heat distortion is not normally experienced. This is a major advantage over hot-dipped galvanising.
As a protective system for structural steelwork it is unsurpassed being the only system, recommended by International and European standards EN ISO 14713 as giving greater than 20 years to first maintenance in very aggressive environments such the marine splash zones (category lm2) as well as all other categories.
In general terms, zinc is used in reasonably low corrosion applications such as water tanks, bridges and general structural steel. Aluminium is used in the harsher corrosion applications such as salt water and splash-zone areas. Aluminium is also used in high temperature areas such as flare booms or pipework on off-shore oil rigs, this is because aluminium effectively dissolves into the substrate when exposed to high temperatures – traditionally known as aluminising.
Pipes & Risers
Oil & Gas Platform Structures
Balustrades, Balconies & Handrails
Refinery Process Tanks/Pipes
Curtain Walling Systems
Bridges & Jetties
Fire Escapes & Staircases
Storage & Process Vessels
Gates & Railings
Valves & Control Gear
Security Door Systems
Rail & Transport Industries