2. Calibration of instruments for use in the deep ocean. 



3. Investigation of the effects of high hydrostatic pressiire 

 (sea water or fresh water) on materials, devices^, electrical 

 equipment, instruments, and other equipment, 



h. Investigation of the effects of variations in sea -water 



chemistry, pressiire^, and temperature on corrosion, and possibly 

 other deep-sea deterioration processes. 



5. Investigation of the effects of a high hydrostatic-pressure 

 sea -water environment on structural joining systems. 



6. Investigation of the effects of a high hydrostatic-pressure 

 sea-water environment on cathodic protection systems. 



?• Investigation of the effects of a high hydrostatic -pressure 

 sea -water environment on protective coatings. 



Deep-Ocean Laboratory Equipment 



Pumps . Sea water is supplied to the pressure vessels by two types 

 of high -pressure pumps. One of these is an air-operated pump capable 

 of supplying and automatically maintaining sea water at any pressure up 

 to 20,000 psi for an indefinite period. The other pump is an electrically 

 driven, reciprocating, manually regulated unit capable of delivering sea 

 water at pressures up to 30j>000 psi. 



Small (l-l/2-inch°ID) Pres sure Vessel (see Figure 10) . This vessel, 

 constructed of chrome -vanadium steel, has an inside length of IO-I/2 

 inches and a maximum operating pressure of 15,000 psi. It is provided 

 with two closures j one closure has one fluid inlet and the other (shown 

 in Figure 10 ) has one fluid inlet plus six electrical lead-in connections. 

 This vessel is used for evaluating the effects of hydrostatic pressure 

 on materials, small devices, and components. Figure 11 shows the safety- 

 housing cabinet for this vessel and its pump. Figure 12 illustrates the 

 interior of the cabinet and shows a test in progress. The reciprocating, 

 adjustable-stroke, electric=motor-driven pump appears in the center fore- 

 ground. All valves are hand-operated thro\:igh an indirect chain-drive so 

 that in the event of a valve stem "blowout" the valve stem will be con- 

 fined within the cabinet and not create a missile type of hazard. In 

 Figure 12 a lead-through test bomb holder is shown resting on the bracket 

 used to hold the l-l/2-inch=ID vessel while in use. 



Ik 



