CONTENTS 



page 



INTRODUCTION 1 



MATERIALS AND EXPERIMENTAL METHODS 2 



Preparation of Test Specimens 2 



Design of Plastic Test Chambers 3 



Design of Plastic-Exposure Strips 5 



Sterilization of Test Chambers 5 



Shallow-Water Exposure Site 5 



Analysis of Seawater 10 



Chemical Tests 10 



Bacteriological Tests 11 



Evaluation of Test Specimens 12 



RESULTS AND DISCUSSION 12 



Shallow Water Tests 12 



Exposure Test No. 1 (70, 112, and 268 Days) . ... 12 



Exposure Test No. 2 (64 and 92 Days) 25 



Exposure Test No. 3 (23 and 43 Days) 32 



Deep-Ocean Exposure Test 42 



Corrosion Rates — Surface Versus Deep Ocean 49 



FINDINGS AND CONCLUSIONS 50 



FUTURE PLANS 50 



REFERENCES 51 



, MBL/WHOI 



0301 0040M00 



