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  Geothermal corrosion

Thermal vents, hot springs and other features in geothermal areas can release sulphur-containing gases such as hydrogen sulphide (H2S) and sulphur dioxide (SO2) into the environment. These gases can be aggressive towards susceptible building and construction materials.

BRANZ conducted field trials in Rotorua to examine how different building materials corrode and deteriorate in geothermal environments.

These four factsheets outline the results of these trials and provide possible explanations:

  1. Which metals are more sensitive to geothermal corrosion?
  2. Distance effects of corrosion in geothermal environments
  3. Discolouration and deterioration of wood in geothermal environments
  4. The performance of aluminium-zinc alloy coating in geothermal environments