Accession Number:

ADA000605

Title:

A Study of Microfouling on Antifouling Coatings Using Electron Microscopy,

Descriptive Note:

Corporate Author:

DEFENCE STANDARDS LABS MARIBYRNONG (AUSTRALIA)

Personal Author(s):

Report Date:

1973-02-09

Pagination or Media Count:

9.0

Abstract:

Scanning electron microscopy has shown that diatoms are the predominant microfouling organisms on a number of antifouling coating specimens from ships and test panels. Surface deposits of amorphous material, attributed to bacteria, have been infrequently observed. Transmission electron microscopy has shown that relatively few species of small, pennate diatoms are present, predominantly of the genus Amphora. Diatoms alter the surface topography and coating structure in such a way that both the frictional resistance and the service life of the coating could be affected. The adhesion of paint applied over diatom layers is adversely affected. The effects of both diatomaceous and bacterial slimes upon the toxic release rate are discussed. Coating composition and the amount of light reaching the coating surface are considered to be major factors affecting the growth of microfouling organisms on antifouling coatings. Author

Subject Categories:

  • Coatings, Colorants and Finishes
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE