Woo:J3K; 



FOULING eF SHIPS' BOTTOMS: IDENTI- 

 FICATION OF MARINE GROWTHS.! 



By the marine CORROSION SUB-COMMITTEE.2 

 (Figs. 2 to 45 = Plates I. to VUI.) 



Paper No. 14/1944 of the Corrosion Committee {submitted by the Marine 

 Corrosion Sub-Committee). 



Contents 



(1) Objects of this Booklet 



(2) The Significance of Fouling 



(3) The Growth of Fouling 



(4) The Anti-Fouling Problem 



(5) The Fouling Organisms 



(a) Slimes . 



(6) Plants (" Weeds ") 



(c) Animals 



(6) The Identification of Fouling Organisms 



(7) Dry-Docking Report and Key 



(8) Notes on the Recognition of Specific Organisms 



(a) Diatom Slimes ..... 



{h) Plants 



' (c) Animals . . . . . • 



PAGE 



1 

 2 

 3 

 5 

 6 

 6 

 7 

 7 



(1) Objects of this Booklet. 

 The objects of this booklet are : 



(1) To emphasise the deleterious effects of fouling on the 

 operation of a ship, 



(2) to give a brief account of the settlement and growth of 

 the marine organisms which are mainly responsible for fouling, 



(3) to discuss briefly the methods of anti-fouling research, 

 and the means of preventing fouling, and 



(4) to describe the characteristics of marine growths in 

 sufficient detail so that they may be correctly identified when 

 present on ships. 



A questionnaire in the form of a dry-docking report is provided on pp. 

 11-12. This form, additional copies of which may be obtained from 

 the Secretary of The Iron and Steel Institute, is intended to serve as a 

 research tool in furthering our knowledge of the growths on ships in 

 relation to the various factors concerned. It is hoped that as many 

 shipowners as possible will make use of this docking report. 



^ Received November 16, 1943. 



2 A Sub -Committee of the Joint Corrosion Committee of The Iron and 

 Steel Institute and the British Iron and Steel Federation reporting to tlie 

 Iron and Steel Industrial Research Council. 



