WFNA was sometimes used with an inhibitor compound to reduce corrosiveness, often hydrogen fluoride. Without inhibitors, WFNA will corrode nearly all structural metals. Inhibited WFNA is often called IWFNA. The hydrogen fluoride addition causes formation of protective layer of fluoride on the metal surfaces.
WFNA as an oxidizer has somewhat less performance than red fuming nitric acid but is considerably safer (though extremely corrosive), as it has little to no dissolved nitrogen tetroxide, which is an extremely toxic and volatile chemical. If not inhibited, it will form nitrogen tetroxide on contact with most metal and some organic materials.
WFNA and IWFNA are considered hypergolic with a long list of other propellants, including:
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Last updated on Thursday November 01, 2007 at 08:17:20 PDT (GMT -0700)
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