An anti-fouling having an extended active life has been developed by Research Consultants Ltd. Known as Plantex, the product has been subjected to extensive tests over a ten-year period during which it has been shown to provide protection against slime, seaweed and barnacles for two years. Development of Planktex followed the discovery by the company that the paint on a boat that had started fouling still contained a large quantity of toxin but had stopped emitting any of this toxin into the sea. On closer analysis it was discovered that the metal oxide at the sea interface had been converted into metallic sulphide which is insoluble in water and therefore drastically lowers the activity of the oxide. Further research proved this to be due to the presence in seawater of a sulphate-reducing bacteria which converts the material in the toxicant to sulphide. This is believed to be due to reduction by the bacteria to sulphide ions of the sulphate ions present in seawater. The presence of only a small amount of metallic sulphide deposited on the surface of the composition has been found to lower drastically its activity against barnacles and other marine growths. Planktex is therefore, basically an antifouling paint containing a high quantity of copper oxide to which has been added a compound which inhibits the effect of this bacteria and keeps the antifouling active so long as there is any copper oxide in the paint.

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  • Corporate Authors:

    Intec Press Limited

    3 Station Parade
    Whyteleafe, Surrey,   England 
  • Publication Date: 1981-2

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  • Accession Number: 00330938
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM