Investigation of effects of additives on storage properties of fuming nitric acids

Feiler, Charles E., Morrell, Gerald.

The storage properties of fuming nitric acids, with and without additives, were investigated at a temperature of 170 degrees F in closed containers of approximately 100-milliliter capacity. It was found that at equal ullages the peak decomposition pressures of white fuming nitric acid are of an order of magnitude greater than those of red fuming nitric acid. Addition of 1 percent potassium fluoride dihydrate was found to be the most effective of the additives investigated in reducing the rate of pressure rise and in reducing corrosion on aluminum and stainless steel surfaces. This additive had no effect on the ignition delay of a representative fuel at 70 degrees F even after 100 hours of storage.

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