The objective of maintenance painting of a ship's hull is to maintain smoothness throughout its life, but problems arise which call for a cost/ benefit yardstick and some means of measuring the degree of success of failure. The Author, of Camrex Ltd. discusses these problems. Hull roughness and its measurement are first considered, and it is mentioned that the Monotester from NSFI and the new gauge from BSRA now make it possible to monitor the roughness not only when the ship is new but also at later routine dockings. The consequences for hull fouling and roughness are discussed, and some numerical data are included on the effects on performance. Two numerical examples, one for a 1,890-dwt container/feeder vessel and the other for a 270,000-dwt tanker, are given to illustrate the cost/benefit results of hull cleaning and coating. Assuming the effect of severe fouling on performance to cost 50 English Pound/sq m per annum, an antifouling system providing freedom from fouling and presenting a smooth surface for 2-3 years would certainly be worth 10 English Pounds a litre at an application rate of 1 litre/sq m. The saving of energy by maintaining a smooth hull (in the case of an 80,000-dwt bulk carrier) is shown to be more economical than the installation of a waste-heat recovery system. The standard of application of coatings is discussed with particular reference to uniform distribution. Order from: BSRA as 78,227.

  • Corporate Authors:

    IPC Industrial Press Limited

    Dorset House, Stamford Street
    London SE1 9LU,   England 
  • Authors:
    • Milne, A
  • Publication Date: 1978-1-20

Media Info

  • Pagination: 2 p.
  • Serial:
    • Marine Week
    • Volume: 5
    • Publisher: IPC Business Press Limited

Subject/Index Terms

Filing Info

  • Accession Number: 00177059
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jun 28 1978 12:00AM