Harbours and Jetties :

It is now evident the piles corrode at rates far in excess of what is now acceptable due to an increase by the precence of colonies of bacteria caused primarily by Sulphur Reducing Bacteria (SRB). This phenomonon is known as Accelerated Low Water Corrosion (ALWC). Identified by orange soft organic bacteria (Ferric 3 oxides), with a black layer (Ferric Sulphide) hiding bright, pitted steel. Research revealed that Cathodic Protection greatly reduces the corrosion rate. This is thought to result from the generation of hydrogen at the surface and the high pH values which can interfere with cell metabolisms. Sulphate reducing bacteria are only active in the near neutral pH range of 5.5 to 8.5. For more information see our Online Catalogue and Click here for online Design Program.