HDG Datasheet 15: Painting and Powder Coating on Hot Dip Galvanizing

Typically a galvanized coating on its own will provide adequate corrosion protection.

HDG Datasheet 15 - Painting and Powder Coating on Hot Dip GalvanizingHowever, an organic may be applied over the galvanized finish for a number of reasons such as to add colour for improved aesthetics, to try and blend the structure into its surroundings, to try and make the structure stand out from its surroundings or to provide additional corrosion protection in a very severe environment.

Duplex Coating

A duplex coating is defined as a combination of two different coating systems which often complement one another. Typically this means a metallic coating overcoated by an organic system. Examples of such systems are hot dip galvanizing surfaces which have been painted or powder coated.

This datasheet offers information on the following:

  • what is a duplex coating
  • benefits of a duplex system
  • specification of the different components of a duplex system
  • surface preparation for duplex coatings

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