Advanced Structural Designs

ACN 097 789 87 92 Vasey Cres CAMPBELL ACT 2612

Telephone 61612171 Facsimile 61612170

Email mal@structuraldesigns.com.au

Can I paint over freshly galvanized steel?

Hot dip galvanised steel is reliably painted every day using a number of different systems. A major benefit of this “Duplex System” is that the whole considerable outperforms the sum of the parts and warranties of up to 50 years are being given on some projects.

Surface preparation is often required prior to painting especially if a weak sodium di-chromate bath (or “chromate bath”) has been used to passivate the surface. If the chromate bath is not used it is recommended that the steelwork be painted within 10 hours of galvanising and is always protected from the elements, a practice often used on large infrastructure projects such a light poles.

If the chromate bath has been used, reliable surface preparations generally include etch primers or whip blasting but the preparation needs to be matched to the paint system. For further information on galvanizing or specifications for surface preparation click on Industrial Galvanizers or if you need a structural engineer’s perspective in Canberra ACT and surrounding districts talk to Mal Wilson of Advanced Structural Designs on Ph 61612171.

For specific information on powder coating galvanizing click on Powder Coating.

For other paint systems we recommend contacting paint manufacturers.