NOTE: The bars indicate the corrosion rate range 

 for three samples tested at the given level. 

 Lines drawn through the midpoint of these 



— ■ 1959 Measurement bars show the corrosion rote profile 



— □ 1965 Measurement determined from the samples. 



Coco Solo. Canol Zone 











Norfo 



k , Vir 



g in la 









5 



i^^_ 















4 



T"" 











- 



^ 



Referred to MLW 



— tV> OJ 



X%-/« 





MHW 









<u 

 o 

 i5 



■^ 











- 







\ N 















MLW 



\ 



\ 













\ 



\ 















\ 



\ 













-1 





V \ 













1 



-■ 





\ \ 

 \ 

 1 ^ 1 



\J 













/X 



S^""* 









Half depth 





£, 













^m 



^ 













^ 



/ 









'' 



1' 







mud 



c 



1 -1 



1 

 rL 















a> 



^ 















c 

 o 



Q 



Referred to 



OJ 



1 



1 











- 



















MHW 



5 10 15 20 25 5 10 



Corrosion Rate (Mils/ Year) 



Figure 7. Corrosion rates of unprotected steel piling at Norfolk and 

 Coco Solo. (After Brouillette and Hanna, I960) 



16 



