V. Laboratory Analysis 



The techniques used for the analysis of corrosion product, biological, 

 and material samples will, of course, depend on the material to be 

 analyzed and the desired results. Written or photographic documentation 

 of observations and results of testing performed are an important part 

 of the laboratory analysis. 



A. Corrosion Products. Corrosion products should be analyzed in 

 accordance with Section 5 of NACE Standard RP-01-73*. Microscopy, X-ray 

 diffraction. X-ray emmission spectography, electron probe microanalysis, 

 infrared spectroscopy, and wet analysis are among the analytical techniques 

 covered in this standard. The main elemental constituent and chemical 

 compounds present in the corrosion products should be identified.' 



B. Biological Samples. The genus and species of the samples 

 should be identified by a marine biologist. Often, in the deep ocean, 

 new species are discovered or known species are found outside their 

 normally defined habitat. 



C. Metallic Samples. Specimens should be subjected to mechanical 

 tests, hardness tests, metallographic examination, and other tests as 

 necessary to evaluate the extent and type of damage to the test samples. 



D. Other Materials. Samples of other materials should be analyzed 



in the laboratory with guidance or assistance from personnel with expertise 

 in their field. 



VI. Personnel Requirements for On- Site Inspection 



A. Basic Requirements 



1 . Inspector - a corrosion engineer experienced in evaluating 

 structures after deep-ocean exposure. 



B. Desirable Additional Requirements 



1 . Photographer - person familiar with closeup photographic 

 techniques; preferably a qualified, professional. Navy 

 photographer. 



2. Technical Assistant - person familiar with the inspection, 

 sampling, and sample-preservation techniques to be utilized. 



3. Mechanical Assistant - person assigned to the inspector 

 for removing material samples, and for other duties. 



See Reference 1 



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