Deep-Ocean Exposure Test 



Identical test specimens which were immersed at the surface at 

 Point Mugu Pier were also exposed in the deep-ocean environment to com- 

 pare biological corrosion rates. Only exposed and control test specimens 

 were placed on STU 1-5,* which was emplaced on the seafloor in 6,000 feet 

 of water for a period of 189 days (6.3 months) in the Pacific Ocean (Figure 37) 

 The test site is located about 80 miles southwest of Port Hueneme, California. 

 The initially sterile cylindrical test chambers containing control panels were 

 filled with surface seawater (5.6 ml/I of O2 ) aboard ship prior to exposure 

 in the deep sea. 



Figure 37. STU 1-5 structure with test specimens on deck of a ship. The STU 

 was emplaced on the seafloor at a depth of 6,000 feet for a period 

 of 6.3 months. 



Supported principally by Work Unit No. YF 38.005.01 . 



42 



