31-Jul-2010, 03:16 AM
Frank, it's not a film it's zinc chromate primer, I believe it's MIL STD. MIL-P-23377. The space shuttle external tank uses the same primer. It's always amazed me that a coat of paint is the only thing that holds the foam on, but it's never failed yet.
When foam comes off it's a failure of the foam itself due to minute trapped air bubbles expanding due to the outside air pressure dropping on ascent.
John
When foam comes off it's a failure of the foam itself due to minute trapped air bubbles expanding due to the outside air pressure dropping on ascent.
John

