CONTENTS 



page 



INTRODUCTION 1 



BACKGROUND 1 



CATHODIC PROTECTION SYSTEMS 2 



Magnesium Anodes 2 



Fabrication 2 



Installation 7 



Performance 7 



Zinc Anodes 10 



Installation of Zinc Anodes 10 



Performance 11 



Zinc Anodes With Additional Leads 12 



Specialized Zinc Anodes 15 



Specialized Zinc Anodes With Steel Cables 22 



Repairs and Fabrication 22 



Performance 25 



Relocation of Mooring 30 



DISCUSSION 38 



ANALYSIS OF MAINTENANCE AND REPLACEMENT 



COSTS 39 



FINDINGS 50 



CONCLUSIONS 50 



RECOMMENDATIONS 50 



ACKNOWLEDGMENT 50 



REFERENCES 51 



MBL/WHOI 



D 03D1 QOMDBTb D 



