Table 6. Weight of Test Panels Before and After 8.5 Months of Marine Exposure 



Panel No. 



Test Panel 



Type of 

 Protection 



Weight 



Before 



Exposure 



(gm) 



Weight 



After 



Exposure 



(gm) 



Weight Loss 



Due To 



Corrosion 



(%) 



1 

 2 

 3 



4 

 5 

 6 



7 

 8 

 9 



10 

 11 

 12 



unpainted 

 carbon steel 



K-Monel 



painted 

 carbon steel 



stainless 

 steel 



none (control) 



skived TFE 

 glass-fiber TFE 



none (control) 



skived TFE 

 glass-fiber TFE 



none (control) 



skived TFE 

 glass-fiber TFE 



none (control) 



skived TFE 

 glass-fiber TFE 



1,310.0* 

 1,333.2* 

 1,310.2* 



1,116.5 

 1,119.0 

 1,117.2 



1,378.4 

 1,395.0 

 1,387.8 



497.61 

 489.18 

 495.18 



1,195.0** 

 1,325.8** 

 1,301.2** 



1 ,093.2 

 1,118.0 



1,116.7 



1 ,377.9 

 1 ,394.5 

 1 ,387.7 



493.18 



488.7 



493.57 



8.80 

 0.55 

 0.68 



2.08 

 0.09 

 0.04 



0.03 

 0.03 

 0.01 



0.89 

 0.09 

 0.32 



Weight after sandblasting. 

 Weight after chemical cleaning. 



Figure 10. Close-up of K-Monel panel 4, showing pits and circular 

 corrosion pattern around barnacle growth. 



17 



