The life of any coating is dependent on the local environment, which is often hard to quantify. The Galvanizers Association is responsible for a nationwide scientific survey that links geographic location to the lifespan of a galvanized coating. Coastal areas corrode the coating quicker due to the environment, so having a thicker coating will allow the coating to last longer.
How to use the map
  • Locate your project on the map
  • Match the colour of the square to the key
  • Read off the average background corrosion
    rate in μm per annum
  • Divide the coating thickness by the corrosion rate to obtain the expected minimum life of the galvanized coating, or just use the following table.
  • Download our PDF map here
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