TABLE 2—How Gamma Radiation Affects Protective Coatings 
Total gamma dose 
Coating Polymer base Surface (10®r) Visual observations 
Alkaloy-550 Furane Concrete panel TD IEE No visible change 
Steel immersion rod 10* No blistering or checking 
Amercoat-23 Vinyl chloride Concrete panel 12.3 Blistered, some cracks 
Steel panel 5 Blistered 
Steel panel—wet 10 One large blister on panel surface 
Amercoat-33 Vinyl chloride Aluminum panel 2.4 Blistered 
Concrete panel 12.2 Blistered, some cracks 
Steel panel—wet 10 Many pinpoint blisters 
Amercoat-44 Vinyl Steel panel—wet 10 Many pinpoint blisters 
Amercoat-55 Vinyl Aluminum panel 2.4 Blistered 
Concrete panel 12.3 Small blisters 
Steel panel 5 Blistered 
Steel panel—wet 10 Blistered 
Amercoat-1574-SE — Epoxy Concrete panel 12* Tacky, some brittleness, discoloration 
Steel panel—wet 10* Color streaked, some hardening 
Amphesive-801 Modified phenolic Concrete panel WSR hs No visible change 
Steel immersion rod 10* Drastically embrittled 
Ampreg-E Polyester resin Concrete panel 10* Layer of crystals on surface of coating 
Steel immersion rod—wet 2.3 
Barrett Silicone Silicone-alkyd Concrete panel 8* 
Steel immersion rod 8* 
Steel panel Se Blistered 
Corrosite-22 Vinyl Aluminum panel 2.4 Blistered, cracked 
Concrete panel 12.3 Dark orange spots (borderline case) 
Duralon-36 Furane Concrete panel 10* Brittle 
Steel immersion rod 10* Entire surface badly blistered 
Dupont White Vinyl chloride Steel panel—wet 10 Entire surface badly blistered 
Dyna-clad Vinyl chloride Steel panel—wet 10 
Epon-395 I-poxy Steel immersion rod 8* 
Steel panel 8* Color, change from gray to green, hardened 
Steel panel—wet 10* Tacky, some brittleness, splotchy 
Epon-1001 Epoxy Concrete panel 12* discoloration 
Steel immersion rod he 
Steel panel 8* Hardened but no cracks or blisters 
Neobon Neoprene Concrete panel 10* Hardened on tip of rod 
Steel immersion rod 10* 
Steel immersion rod—wet 2.3 Some crystallization below surface, much 
Steel panel 10* harder surface 
Nukemite-40 Vinyl Aluminum panel 3.5 Blistered 
Concrete panel 12.3* Surface soft, roughened 
Steel immersion rod 10* 
Steel panel—wet 10 Few small blisters, color much darkened 
Phenoline-3 Phenolic Concrete panel 10 Visible cracks 
Steel immersion rod 10 Visible cracks 
Polyclad Sealcoat Vinyl chloride Steel panel—wet 10 Surface badly wrinkled 
Prufcoat Styrene Concrete panel 10 Hard, brittle craters, no blisters, dark- 
ened layer under surface 
Steel immersion rod 10 Checked, cracked, blistered 
Steel panel wet 1 Paint cracked from panel 
Solar silicone alkyd — Silicone-alkyd Concrete panel 8* 
Steel immersion rod 8* 
Steel panel 8* 
Ucilon Vinyl chloride Steel panel—wet 10 Surface 'blistered, 
Zerox-110 Styrene butadiene Concrete panel eos Extreme checking, darkened 
Steel immersion rod—wet 2.3 
* Discontinued before failure; all others were discontinued because of failure. 
dn TETTEEEIEEEEEEEEEEEEEEEEEEEEEEEEEEEEERERE 
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