■'■•■ y^^^c^ 



Figure 7. K-Monel panels after biological growth and plastic coverings had 

 been removed. The entire surface of control panel 4 is covered 

 with pits due to corrosion. Panels 5 and 6 were protected by 

 TFE film. The surfaces of these panels are free of corrosion. 

 Lines of discoloration are shown on panel 5. 





Figure 8. Painted carbon steel panels after biological growth and plastic 



covering had been removed. Control panel 7 has a large number 

 of barnacle baseplates still attached to the surface. Panels 8 and 

 9 were protected with TFE film. Barnacles grew over one small 

 area of panel 9 where a small section of plastic covering was torn. 



12 



