50 



40 



20 



10 



>* 4 



a 2 



_ O MPY 



Max. Pit Depth, Mils. 



A Crevice Corrosion, Depth, Mils. 



- 1 1 b-L : :l;:;J 



.■.:.'' 



! ,.i. 



L«il 



A 



Q ♦ 



Days 181 

 Depth, Ft. 5 



197 

 2,500 



123 

 6,000 



398 

 5 



402 

 2,500 



403 

 6,000 



751 

 6,000 



1064 

 6,000 



Figure 39. Corrosion rates, maximum pit depths and crevice corrosion of 20Cb 

 stainless steel in seawater at the surface and at depth. 



98 



