Figure 5. Biological growth over painted carbon steel panels. 



Saran-covered panels were also laden with marine growth composed 

 mostly of hydroids and barnacles as well as some colonial tunicates, bryozoans, 

 and algae. Mussels and tubeworms, which were found on TFE, were absent 

 from saran, probably because the latter was placed in the sea at a different 

 time of the year. There were 14 to 44 barnacles, measuring up to 1 inch in 

 diameter at the base, attached to the surface of the saran-covered panels; 

 the average wet weight of fouling accumulation was about 400 grams per 

 panel. 



Table 4 lists the kinds of fouling organisms found on the test panels. 

 There was much less fouling on the control panels of unpainted carbon steel 

 and K-Monel than on the painted and plastic-covered carbon steel panels. 

 This may be due to the thin layers of corrosion products formed over the 

 control panels. Such corrosion products may have discouraged the settling 

 of fouling organisms. 



