Table 3. Corrosion Rates and Types of Corrosion of 200 Series Stainless Steels 



Alloy 



(1) 



Environment 



Exposure, 



Depth, 



Corrosion 



Maximum 



Corrosion, 



Corrosion 



Source 





Days 



Feet 



^te 

 MPY*- ,; 



Pit 



Crevice, 



Type( 4 ) 











Depth, 



MilsW 















Mils 









W 



182 



5 



<0.1 







I 



C 



INC0(} 2 ) 



W 



366 



5 



0.6 











SE 



INCO (125 



W 



197 



2340 



<0.1 







4 



C 



IN0OJ12J 



inco; t. 



S 



197 



2340 



<0.1 







3 



C 



W 



402 



2370 



<0.1 







1 



C 



INC0 (12 ) 



S 



402 



2370 



<0.1 







2 



C 



INC0( 12 ) 



W 



123 



5640 



<0.1 







I 



C 



INCo( 12 ) 



S 



123 



5640 



<0.1 











NC 



INOO^ 12 ) 



w 



403 



6780 



<0.1 







I 



C 



INCO^ 12 ) 



S 



403 



6780 



<0.1 







2 



C 



INCO^ 12 ) 



w 



751 



5640 



<0.1 







I 



C 



INC0^ 12) 



s 



751 



5640 



<0.1 











NC 



incqC 12 ) 



w 



1064 



5300 



<0.1 







I 



c 



INCo( 12 ) 



s 



1064 



5300 



0.5 



50(PR) 



I 



C,P 



INCO^ 12 ) 



w 



182 



5 



0.6 



50 (PR) 



50 (PR) 



c? 



INCO^ 12 ) 



w 



366 



5 



0.5 



50 (PR) 



50(PR) 



C,P 



INCO^ 12 ) 



w 

 s 

 w 

 s 

 w 

 s 

 w 

 s 

 w 

 s 

 w 

 s 



197 

 197 

 402 

 402 

 123 

 123 

 403 

 403 

 751 

 751 

 1064 

 1064 



2340 

 2340 

 2370 

 2370 

 5640 

 5640 

 6780 

 6780 

 5640 

 5640 

 5300 

 5300 



<0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 

 <0.1 





 

 

 17 

 

 

 

 

 

 

 D 

 



I 



I 

 17 

 

 

 

 I 

 I 

 I 

 I 

 

 50(PR) 



c 

 c 

 c 

 p 



NC 



NC 



C 



C 



C 



c 



NC 

 C 



INCO^ 12 ) 

 INCO^ 12 ) 

 INCO^ 12 ) 

 INCO^ 12 ) 

 INCO (12 > 

 INCO^ 12 ) 

 INCO^ 12 ) 

 INCO^ 12 ) 

 INCO (12 ) 

 INC0 (12 ) 

 INCO^ 12 ) 

 INCO^ 12 ) 



201 

 201 

 201 

 201 

 201 

 201 

 201 

 201 

 201 

 201 

 201 

 201 

 201 

 201 



202 

 202 

 202 

 202 

 202 

 202 

 202 

 202 

 202 

 202 

 202 

 202 

 202 

 202 



1. AISI Type 



2. W - Specimens exposed on sides of STU in water. 



S - Specimens exposed in base of STU, partially embedded in the bottom sediment. 



3. MPY - mils penetration per year calculated from weight loss. 



4. Abbreviations signify the following types of corrosion; 

 I - Incipient 



C - Crevice 



P - Pitting 



S - Severe 



E - Edge 

 NC - No visible corrosion 

 PR - Perforated 

 Number indicate maximum depth in mils. 



5. Numbers refer to references at end of paper. 



25 



