motive force in steel-reinforced concrete ocean structures. The effects 

 of differential oxygen concentrations and hydrostatic pressure on corrosion 

 need to be investigated. The electromotive forces between structural 

 elements of reinforced concrete and steel need to be analyzed. Certain 

 portions of the OTEC structure are likely to be massive plain steel com- 

 ponents (for example, the mooring line ) . The question of whether or not 

 the reinforcing steel will be anodic to the plain steel needs to be 

 studied. Also, information is needed on the potential effects on rein- 

 forcing steel of possible "stray electrical currents" associated with an 

 in-water power plant, and of the presence of huge quantities of other 

 metals such as aluminum or titanium in the heat exchangers. 



Development of methods to prevent corrosion and also to passivate 

 existing corrosion needs to be conducted. Techniques or products that 

 produce a less permeable concrete are desirable. The effectiveness of 

 existing methods to seal pores with crystalline compounds needs to be 

 tested. New methods such as impregnating concrete with corrosion inhibi- 

 tors should be studied. Coating techniques also should be evaluated; 

 this includes coatings such as polymer— impregnated concrete. 



A document discussing the state of art needs to be published to dis- 

 cuss potential corrosion problems, methods of designing against corrosion, 

 nondestructive methods to detect incipient corrosion before the concrete 

 is damaged, and remedial methods to inhibit further corrosion and to repair 

 corrosion-damaged concrete. This document will provide a guide to research 

 and development studies. 



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