300 

 200 



100 

 80 



60 



40 



20 



10 



8 

 6 



.2 



Circular Weld 



Transverse Butt Weld 



• A 



O 



*A 



#A 



♦ A 



♦ & 



O mpy I j [ 



• Max. Pit Depth, Mils. 



A Crevice Corrosion, Depth, Mils 



P Perforated 



o 



Days 



181 



197 



398 



402 



403 



Depth, Ft. 



5 



2,500 



5 



2,500 



6,000 



181 197 402 403 



5 2,500 2,500 6,000 



Figure 29. Corrosion rates, maximum pit depths and crevice corrosion of 

 welded AISI Type 631-TH1050 precipitation hardening stainless 

 steel in seawater at the surface and at depth. 



