_ 20 











O 



1 1 1 1 1 



Exposed on plastic strip 















Cylinder— ends left open 



Cylinder— ends covered with nylon screen cloth 











V 











D 



Cylinder— ends covered with membrane filter 

 » STU 1-5 Exposed panels. 1.34 mpy 

 B STU 1-5 Control panels. 0.48 mpy 













i 



\ 









— 



Plotted 

 Extrapolated 



o 



y \^ 











\ 



v^ O 



o 



















\o 



"^ 



~^_ 



O 

















o 



o^~^ 



^. 

























rrr 



D 



^ 



n 



G 























o 











1 









25 



50 



75 



200 



225 



250 



100 125 150 175 



Length of Exposure (days) 

 Figure 35. Corrosion rates of 1010 carbon steel near ocean surface from data 

 presented in Tables 2, 3, and 5. 



30 









1 



o 



1 1 1 1 1 



Exposed on plastic strip 



















Cylinder— ends left open 



Cylinder— ends covered with nylon screen cloth 



2b 



















D 



Cylinder— ends covered with membrane filte 





20 











® STU 1-5 Exposed panels. 3.65 mpy 













8) STU 1-5 Control panels. 1.85 mpy 





15 









— 



Plotted 





^ 









Extrapolated 







o^ 



V 





























^ 



——a- 



















































® 













■ — a 



Sn 



















-. 



^ 















^ 



25 



50 



75 



200 



225 



250 



100 125 150 175 



Length of Exposure (days) 



Figure 36. Corrosion rates of 7178-T6 aluminum alloy near ocean surface from 

 data presented in Tables 2, 3, and 5. 



41 



