Table 11. Continued 



Alloy 



CDA No. fl 



Environment 



Exposure 

 (day) 



Depth 

 (ft) 



Corrosion 

 Rate 

 (mpy) 



Type of 

 Corrosion' 



Source 



Be-Cu* 



172 



W 



181 



5 



0.1 



ET 



CEL (4) 



Be-Cu* 



172 



W 



364 



5 



1.1 



U 



CEL (4) 



Be-Cu* 



172 



W 



111 



5 



0.7 



U 



CEL (4) 



Be-Cu* 



172 



w 



763 



5 



0.7 



U 



CEL (4) 



Be-Cu chain 



825 



w 



402 



2,370 



0.5 



U 



CEL (4) 



Be-Cu chain 



825 



s 



402 



2,370 



0.4 



U 



CEL (4) 



Be-Cu chain 



825 



w 



181 



5 



0.1 



u 



CEL (4) 



Be-Cu chain 



825 



w 



364 



5 



1.0 



u 



CEL (4) 



Be-Cu chain 



825 



w 



723 



5 



0.8 



u 



CEL (4) 



Be-Cu chain 



825 



w 



763 



5 



0.8 



P (30.5m), C (7m) 



CEL (4) 



''Copper Development Association alloy numbers. 



W = totally exposed in seawater on sides of structure. 



S = exposed in base of structure so that the lower portions of the specimens were embedded in the 

 bottom sediments. 



c Symbols for types of corrosion: 



C = Crevice P = Pitting 



ET = Etching U = Uniform 



G = General 



NC = No corrosion 



Numbers indicate mils (i.e., 20 = 20 mils; 20m = 20 mils maximum) 



Numbers refer to references at end of report. 



6 Francis L. LaQue Corrosion Laboratory, INCO, Wrightsville Beach, N.C. 



■'Beryllium-copper 



g Aged at 600°F 



^Agcd at 800°F 



'MIG weld 



•'Uniform, weld bead etched 



*TIG weld 



'Cast 



59 



