Manufacturers of Organics Tested 
UNMOUNTED COATINGS 
A-89-A-Black—Gordon-Lacey Chemi- 
cal Products Co., N. Y., N. Y. 
Amercoat Strip, Amerplate 
(T-Locked, Black and White)—Amer- 
coat Corp., South Gate, Cal. 
Brevon-Black—Atlas Powder Co., N. 
Chicago, Ill. 
GE Cocoon—R. M. Hollingshead 
Corp., Camden, N. J. 
Tygofilm-Blue—U. S. Stoneware, Ak- 
ron, O. 
Flame-sprayed polyethylene—Pow- 
der Weld Process Co., Brooklyn, N. Y. 
MOUNTED COATINGS 
Alkaloy-550, Amphesive-801, Am- 
preg-E, Neobon, Zerox-110—Atlas 
Mineral Products Co., Houston, Texas. 
Amercoat-23, 33, 44, 55 and 1574 
SE—Amercoat Corp., South Gate, Cal. 
Barrett silicone—Barrett Varnish Co., 
Cicero, Ill. 
Corrosite-22—Corrosite Corp., N. Y., 
Nee 
Duralon-36— U.S. Stoneware, Akron, 
0. 
DuPont White—DuPont Co., Inc., 
Wilmington, Del. 
products may have received incorrect 
ratings. 
Protective Coatings 
The most important uses of protec- 
tive coatings in radiochemical process- 
ing are to: (a) prevent corrosion of 
auxiliary process equipment (equip- 
TABLE 1—How a Gamma Dose of 1.05 X 10° -* Damages Unmounted Coatings 
Dyna-clad— Merchants Chemical Co., 
Incs N. Y., Ne Ye 
Epon-395—Glidden Co., Chicago, Ill. 
Epon-1001—Shell Chemical Corp., 
N= Yen NOY: 
Nukemite-40—Nukem Products 
Corp., Buffalo, N. Y. 
Phenoline-3, Polyclad Sealeoat— 
Carboline Co., St. Louis, Mo. 
Prufcoat—Prufcoat Laboratory, Inc., 
Cambridge, Mass. 
Solar Silicone Alkyd—Solar Corp., 
Milwaukee, Wis. 
Ucilon—United Chromium, Inc., N.Y., 
Now: 
GASKETS AND ELASTOMERS 
Polyethylene, plain and _ carbon- 
filled—A merican Agile Co., Cleveland, O. 
Polystyrene—Dow Chemical Co., 
Midland, Mich. 
Teflon—Du Pont Co., Inc., Wilming- 
ton, Del. 
Kel-F—Kellex Corp., N. ¥., N. Y. 
Silicone rubber 12602 and 12603— 
General Electric Co., Waterford, N. Y. 
Hycar rubber PA-21 and OR-25— 
B. F. Goodrich Chemical Co., Cleveland, 
0. 
ment not normally in contact with 
main process streams), and (b) improve 
the decontaminability of auxiliary 
equipment, the outside surface of main 
process equipment, and other surfaces 
such as the walls and floors of high- 
activity cells. 
Coatings applied in various ways 
Coating Polymer base 
Strip coats 
A-89-A Vinyl 
Amercoat Strip Vinyl 
Brevon Vinyl 
GE Cocoon Vinyl copolymer 
Tygofilm Vinyl copolymer 
Plastic sheets 
Amer Plate Vinyl 
(T-locked, black) 
Amer Plate Polyethylene 
(T-locked, white) 
Polyethylene Polyethylene 
(flame-sprayed) 
* As measured in air. 
From Teflon molding 
powder during’ 
irradiation \ 
° 
\ 4 
From Tetion disks | 
during 30 days after 
: irradiation 4 
0.01 se 
_ From Teflon disks (lin. dia, 
Ugin. thick) during - ; 
s 
irradiation . 
Fivorine Evolution {mg fivorine/gm ot specimen) 
ve} 
10% 107 to® 
eu phe bac Gammo Dose {r) meg 
FIG. 1. Fluorine evolution from Teflon 
during and after irradiation 
were irradiated with the Co gamma 
source. For convenignce, several 
types of coatings that in actual use 
would be subjected to radiation while 
mounted on a surface were irradiated 
in an unmounted sheet form. These 
include stripcoats, a flame-sprayed 
polyethylene coating, and examples of 
““T-locked”’ plastic sheet. All other 
coatings were applied to either panels 
(aluminum, steel or concrete) or steel 
immersion rods. 
The acceptability or failure of an 
irradiated coating depends on the 
requirements of its use. In the same 
way, the types of tests used to study 
the effect of gamma radiation vary with 
the projected use of the coating. 
Unmounted coatings. For the three 
types of coatings irradiated in sheet 
form, the strength of a coating-to-sur- 
Color change Flexibility 180-deg-bend test Remarks 
Black—unchanged Stiff Breaks Sample curled 
White to gray Stiff Breaks Sample curled 
Black—unchanged Stiff Breaks Sample curled 
Orange to black Flexible Bends Tacky surface 
Blue to gray Stiff Breaks Not curled 
Black—unchanged Stiff Breaks Not curled 
White to amber Stiff Breaks Not curled 
Red, yellow, and blue to darker shades _ Stiff Breaks Not curled 
102 
