TABLE 1. SUMMARY OF SUBMERGENCE TEST RESULTS 



Sample No. 



1 



2 



3 



4 



5 







Acrylic, 

 Va in. thick 







Corrosion- 



Material 



Steel 



Steel 



Douglas Fir 



Resistant 

 Steel 





Corrosion-resistant 



None. 



Corrosion-resistant 



None. 



Uncoated. Bent 



c 



coatings with copper- 





coatings with 





to induce stress. 





organotin ontifoulant. 





cuprous oxide 





fastened with 



o 







ontifoulant. 





CRES nut and 















bolt. 



H 















Coatings were chipped 



Heavily fouled 



Thin layer of green 



Heavy branching 



Completely 





off edges of sample and 



over 90% of the 



algal-fouling growth 



bryozoa over 



fouled. Large 



c 

 o 



anti-fouling coating was 



surface. Large 



over entire surface. 



entire surface. 



clumps of bran- 



o ^- 



washed off along the 



percentage of 



Scratch in coating 



Some kelp, tun- 



ching bryozoa 



sides and some areas 



encrusting 



permitted another 



icotes, balanus. 



and white sponge 



2 o- 

 1» »> 



in the center of the 



bryozoa with 



type of fouling to 



limpets, etc.. 



were predominant. 



CT 



panel. Hydroid and 



the balance 



propagate. Too 



including, for 



Small scattering 



^ E 



JO 



bryozoon foulants 



matted with 



small to identify 



the first time. 



of filamentous 



attached along the bare 



branching bryo- 



without a micro- 



large c lumps of 



green algae ond 



o ■" 



1- -t 



edges and a tight scum 



zoa. Other 



scope. One edge 



white sponge 



j ingle shells 



o 



of bacterial and proto- 



foulants were 



of panel was chipped 



(see fig. 4). 



were found. 



-&•£ 



zoan colonies covered 



mussels (mostly 



to bore metal. 





Some corrosion 



si 



approximately 80% of 



on the chafing 



A slight feathering of 





around the bolt 



o ^ 



the surface of the 



tubes), limpets, 



branching bryozoa hod 





and nut. 



C 00 



sample. 



balanus, and 



started in this area. 







fl) ^- 





corynactus. 









o 















Panel seemed to have 



Approximately 



One corrosion 



Wood was about 



Extens ive 



_E 



been damaged during 



25% of surface 



eruption approximate- 



30% eaten away 



corrosion 



Q. 



installation on SQUAW 



covered by 



ly I'/j to 2 inches 



by borers. 



around bolt head. 



C 0) 

 O -D 



or release of coi 1. 



j ingles and 



across was located 



There were a 



One jingle and 



'■§ J 



Undamaged areas were 



15% by 



in the central area 



few jingle 



approximately 





clean. Damaged area 



hydroids. 



of the panel. Scrape 



shel Is and tube 



a dozen sea 



•2 n 



was badly corroded. 



A number of 



marks across the 



worms on the 



anemones were 



1 o 



No fouling. 



red and pink 



corroded area 



board. 15% of 



attached. 



^ 1 

 O E 





sea anemones 



provided a starting 



the remainder 







were also 



place for the oxida- 



of the panel 







attached. 



tion. The panel was 



was covered 









clean of all biologi- 



with hydroids 





G. 







cal growth. 



(fig- 5). 





