Table 82. Continued. 



Alloy 



Environment' 7 



Exposure 



(day) 



Depth 

 (ft) 



Corrosion 



Source 17 



Rate 

 (mpy) 



Type'' 



13V-llCr-3Al t ' 

 13V-llCr-3Al d 

 13V-llCr-3Al e 

 13V-llCr-3Al d 

 13V-llCr-3Al e 

 13V-llCr-3Al' y 

 13V-llCr-3Al e 

 13V-llCr-3Al d 

 13V-llCr-3AI e 



S 



W 



w 



w 

 w 

 w 

 w 

 w 

 w 



402 

 181 

 181 

 398 

 398 

 540 

 540 

 588 

 588 



2,370 



5 

 5 

 5 

 5 

 5 

 5 

 5 



0.0 

 0.0 

 0.0 

 0.0 

 0.0 

 0.0 

 0.0 

 0.0 

 0.0 



NC 



sec' 



NC; FS 



sec (6)> 



sec (2)* 



SCC(12y 

 SCC(l)* 

 SCC(19) 7 



seed)'' 



CEL (4) 

 CEL (4) 

 CEL (4) 

 CEL (4) 

 CEL (4) 

 CEL (4) 

 CEL (4) 

 CEL (4) 

 CEL (4) 



fl 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. 



Symbols for types of corrosion: 



BD = Bluish discoloration on portion in bottom sediment. 



CR = Cracked 



FS = Fouling stains 



HAZ = Heat-affected zone 



NC = No visible corrosion 



SCC = Stress corrosion cracking 



Numbers in parentheses are number of stress corrosion cracks 



' Numbers refer to references at end of report. 



Unrelieved 3-in.-diam weld bead in center of specimen, TIG process, nonconsumable tungsten electrode. 



e Unrelieved butt weld across width of specimen, TIG process, nonconsumable tungsten electrode. 



■'TIG welded, commercially pure titanium filler metal used, unrelieved. 



^Cracked in heat-affected zone of unrelieved transverse butt weld. 



Two cracks in each specimen perpendicular to and across circular weld beads; some branching; 

 penetrated through 0.125-in. -thick plate. Bluish discoloration on portions of specimens in sediment. 



'Exposed in Tongue-of-the-Ocean, Atlantic, 0.3-kt current, 4.5°C, 5.18-ml/l oxygen. 



•'Cracks radially across circular weld bead into base metal outside heat-affected zone. 



Cracks across weld bead normal to direction of welding. 



233 



