CONTENTS (Continued) 



Page 



Section VII (Continued, 



3. Concrete Jackets 3d 



h. Cathodic Protection ^0 



a. General ^0 



b. Principle of Cathodic Protection ^0 



c. Types of Cathodic Protection ^0 



d. Galvanic System ^2 



e. Electrolytic (impressed Current) System ^3 



f. Anode Installation ^T 



Section VIII, CONCLUSIONS ^8 



LITERATURE CITED ^9 



Appendix A. TABLES I THROUGH XV 

 Appendix B. GLOSSARY OF CORROSION TERMS 



ILLUSTRATIONS 

 Figure 



1. Corrosion of iron in 3% sodium chloride solution showing the 

 effect of temperature and aeration 8 



2. Effect of pH on corrosion of mild steel 9 



3. Variation of corrosion of iron as a function of the salinity, 



T = T5F 10 



h. Effect of velocity on corrosion of steel by seawater at 



atmospheric temperature 12 



5. Corrosion rates of unprotected steel piling in seawater ... ik 



6. Corrosion rates of unprotected steel piling at Boston 



and Alameda 15 



T. Corrosion rates of unprotected steel piling at Norfolk 



and Coco Solo l6 



8. Pitting profile l8 



9. Seawater corrosion comparison for A-328 steel and mariner steel 19 



10. Effect of seawater velocity on corrosion rate of zinc at 



ambient temperature 22 



