100 

 80 

 60 



40 



20 



10 



A 4 



§ 2 



.6 



.4 



A 



O MPY 



• Max. Pit Depth, Mils. 



A Crevice Corrosion, Depth, Mils. 



b'iiH ift»Al ftt«Ai 1o«a1 to»Al lo'irAl Io»a1 IoIaI 



Days 182 197 123 366 402 403 751 1064 

 Depth, Ft. 5 2,500 6,000 5 2,500 6,000 6,000 6,000 



Figure 13. Corrosion rates, maximum pit depths and crevice corrosion of AISI 

 Type 309 stainless steel in seawater at the surface and at depth. 



72 



