RENEWED ANTIFOULING WITHOUT DRYDOCKING

A Norwegian Paint manufacturer and the Ship Research Institute of Norway, have come up with an antifouling system which could extend periods between VLCC drydocking to four or five years with resultant savings of up to $300,000. In essence, the system works on the simple premise that the effectiveness of any antifouling paint decreases as the poison in the paint's outer layer is leached out. By removing this dead outer layer and exposing the unleached paint underneath, the antifouling properties should be fully restored without the need to drydock and re-paint. The principle of reactivating unused antifouling has been known for some time but the problem has always been just how the reactivation should be accomplished. The removal of the dead, outer layer of paint is achieved by using diver-operated Scamp underwater automatic hull-cleaning machines. These machines drive along the ships' sides underwater and are fitted with hydraulically operated rotary brushes, giving an accurate control of pressure on the surface. The system starts with careful suface preparation of the hull and precisely controlled paint application from bare steel to the last coat of antifouling. Ships already in service would need to be dry docked and blast cleaned down to bare steel to a minimum of Sa 2.5. The balance of the article explains the application and cleaning procedures including costs and projected savings.

  • Availability:
  • Corporate Authors:

    Seatrade Publications Limited

    Fairfax House
    Colchester CO1 1RJ, Essex,   England 
  • Authors:
    • LONES, T
  • Publication Date: 1975-2

Media Info

  • Pagination: p. 65-67
  • Serial:
    • Seatrade
    • Volume: 5
    • Issue Number: 2
    • Publisher: Seatrade Publications, Limited
    • ISSN: 0037-0428

Subject/Index Terms

Filing Info

  • Accession Number: 00084626
  • Record Type: Publication
  • Source Agency: Seatrade Publications Limited
  • Files: TRIS
  • Created Date: May 7 1975 12:00AM