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GAMMA RADIATION EFFECTS ON HULL SEALANTS. Final Report

Technical Report ·
OSTI ID:4175024
Ten sealants presently in use on seaplanes of the U. S. Navy and on the Princess flying boats of the British Navy were evaluated. Irradiation was completed using a 3000curie Co/sup 60/ source. The source, contained in 78 pencils, was placed in a cylindrical array about an air-tight canister and provided a dose mte of between 0.19 and 0.16 megarep per hour over the study period. Dynamic test pressure discs, sealed with the sealant in question, and the static test samples were prepared. Tensile and peel strengths, elongation, hardness, and weight change properties of each sealant, at three accumulated doses up to 200 megarep, were evaluated. Corrosion effects and jet fuel absorption properties were also studied. The 10 sealants covered were EC-801, PR- 1422, EC-1602, Silastic RTV501, PR-1321, marine glue, barium chromate, Bostik 1790, Bostix 1752, and Bostik 1751. All sealants showed a degradation of mechanical properties due to radiation damage. All the sealants with the exception of EC-801 and EC-1602 held up satisfactorily under the dynamic tests and could be used in radiation fields if they were used between metal surfaces and if they are not subjected to large structural loads. Three sealants, Bostik 1790, Pr-1321, and PR-1422, exhibited only moderate changes in the mechanical properties and could be used as sealants in radiation fields where the useful lifetime accumulated dose would not exceed 50 to 75 megarep. (auth)
Research Organization:
Martin Co. Nuclear Div., Baltimore
NSA Number:
NSA-14-019507
OSTI ID:
4175024
Report Number(s):
MND-2266
Country of Publication:
United States
Language:
English

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Related Subjects

BARIUM COMPOUNDS
CHROMATES
COBALT 60
COMBUSTION
CONFIGURATION
CORROSION
EXPANSION
GAMMA RADIATION
GAMMA SOURCES
HARDNESS
IRRADIATION
JETS
MECHANICAL PROPERTIES
METALS
METALS, CERAMICS, AND OTHER MATERIALS
RADIATION EFFECTS
SEALS
SHIPS
SURFACES
TENSILE PROPERTIES
TESTING
WEIGHT