Powder coating galvanized steel is better; |
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 Steels with varying silicone contents can produce different gloss galvanizing, this can sometimes help predict whether the galvanize will produce pin holing during powder coating. |
Ask for Tri-Resin™ System (Galvanise) Powder coating galvanized steel: Powder coat galvanizing ensures a professional look, free from amateurish runs and brush marks. With the Tri-Resin™ System the galvanized steel will be better protected. Disadvantages:  More difficult to achieve smooth, blemish free paint finish.Can produce gas holes (pin holes) in paint finish.Galvanise can be a rough finish, requires a lot of fettling.Galvanising is an extra expense to the finishing.Possible distortion of light material.Advantages Well proven method of protecting steelwork.Component should not produce brown rust marks.Component should remain structurally sound, for longer compared to non galvanised.Seals inaccessible areas that paint cannot reach. |
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Galvanize gets where paint cannot. This design is a good example of what should be galvanised. The use of circles has produced areas where it would be very difficult to seal with just paint. For this and other designs, which would cause similar areas of no panting, get it galvanised first. The Tri-Resin System where applied, makes a very good paint barrier for corrosion resistance, but the metal design has to be appropriate for good cover |
 Good example of what should be galvanised. |
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 Galvanised steel oxidising under the paint. |
When there is not enough paint protection. Zinc is a very is reactive metal that will readily oxidize under the paint if it has access to air and moisture. This is why the Tri-Resin System is used. Three coats of paint are applied to seal the zinc. (Not painted by Windridge Coatings.) |
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