Table 12. Corrosion of Steels in Sea Water (Cont'd) 



Alloy 



Exposed 



Corrosion 



Rate. 



MPY^ 1 ' 



(13) 

 Corrosion, 



Type 



Source' 2 ' 



Days 



Depth, 

 Feet 



AISI Type 502 



181 

 181 

 197 

 123 



5 



5 



2340 



5640 



7.0 



13.0 



1.2 



3.6 



p(14> 



G 

 C,P< 15 ) 

 p (16) 



NCEL 

 INCoW 



NCEL 

 NCEL 



1. MPY-Mils penetration per 



2. Numbers refer to referenc 



3. Crevice corrosion to 8 mils. 



4. HSLA signifies a high strength -low alloy 



5. Maximum pit depth 11 mils average 10,1. 



6. Maximum pit depth 20 mils average 16.5. 



7. Crevice corrosion to 9 mils. 



8. Crevice corrosion to 4 mils. 



9. Maximum pit depth 12 mils average 10.6. 



10. HS signifies high strength steel. 



11. Only 1 pit 22 mils deep. 



12. Broad pits. 



13. Types of corrosion: 

 C - Crevice 



G - General 

 IP - Incipient pitting 

 P - Pitting 

 U - Uniform 



14. Maximum pit depth 18 mils average 15.4. 



15. Maximum pit depth 20 mils average 16.3, - 



16. Maximum pit depth 23 mils average 18.2. 



alculated from weight loss, 

 end of paper. 



corrosion to 13 



