Zinc SprayMetal spraying provides an effective and resilient barrier to corrosion on steelwork. A protective coating of zinc or aluminium in molten particles is flame sprayed ontoclean, prepared surfaces through a hand held gun. The thickness can be varied to produce different life spans depending on the environment, but are typically between 50 and 150 microns.
Hot zinc or aluminium spray fulfils all of the criteria for an excellent protective substrate.A controllable thickness, smooth even consistent finish, fused on, tough and resilient coating, well keyed surface for subsequent painting, no damage or distortion during treatment. Zinc and aluminium are anodic “sacrificial” coatings that protect by oxidising inpreference to the steel substrate, other cathodic coatings (e.g. copper or nickel) can be applied by the same method, these rely on keeping an undamaged barrier around the substrate to protect it. Electronic components can also be metal coated by the same process to prevent radio frequency interference.
Subsequent treatments availableSealing by priming is advisable to penetrate and fill pores, leaving a fully protected and smooth finish. Painting or stove enamelling can be added to provide decorative finishes and extend the longevity of the coating. Powder coating can be applied to provide a tough consistent coating over the rustproofing qualities of zinc spray.
CapacityOur fork lift and large rooms enable us to handle items up to 3 tonnes, 12m long x 7m wide x 2.8m high.
StandardsBS 2569/BS EN 22063:1993, BS5493 1977, Association of metal sprayers advisory notes.
TestingFilm thickness gauges. Cross hatch adhesion test.