CONTENTS 



Page 



INTRODUCTION 1 



BRIEF DISCUSSION OF FIELD TEST ON ANTENNA POSITIONER AT PMTC ... 1 



LABORATORY SALT-SPRAY EXPOSURE OF COATING SYSTEMS 2 



First Series 2 



Second Series 3 



CLEANING AND COATING APPLICATION EQUIPMENT 3 



Design 3 



Results 4 



FIELD EXPOSURE OF COATINGS ON VORTEX TOWERS AT PMTC 4 



Preparation of Test Areas 4 



Coating Selection 5 



Results 5 



PRACTICES RECOMMENDED BY CEL FOR PROTECTING ANTENNA TOWERS .... 6 



Types of Antennas 6 



Design for Corrosion Control 6 



Surface Preparation for Coating Repair 7 



Coating Selection 7 



Coating Antenna Guy Lines 8 



COST CONSIDERATIONS FOR NEW STEEL CONSTRUCTION 9 



SUMMARY OF RESULTS AND RECOMMENDATION 10 



ACKNOWLEDGMENTS 10 



REFERENCES 10 



APPENDIXES 



A - Type and Sources of Coating Systems Used on Second 



Series Salt-Spray Exposure 37 



B — Formulas of Experimental Paints Used 



on Vortex Towers 40 



C — Coating Systems Used on Vortex Towers 42 



