INHIBITED N2O4
Abstract
This program is concerned with evaluating a new storable liquid oxidizer INTO, which is nitrogen tetroxide (NTO) inhibited with FNO2. Corrosion tests of steel and aluminum alloys are being conducted in wet NTO, dry NTO, and dry NTO + HF. The tests are being conducted at ambient temperature for 30 days and for 20 months, and at 70 C for 30 days. The results of the 30-day ambient temperature test is reported herein. A definite passivation layer was noted both visually and by weight change on the aluminum samples exposed to INTO made from dry NTO. Storability tests of INTO in stainless-steel, aluminum, and nickel containers at 70 C have now been in progress for 4 months with no apparent change in the composition of the propellants. INTO has been prepared by bubbling F2 through liquid-propellant-grade NTO at ambient temperature. The reaction proceeded smoothly and no difficulties are anticipated in scaling up the operation. The conductivities of INTO prepared from wet and dry NTO have been measured. They were found to be 3.4 and 4.0 x 10 to the minus 11th power/ohm-cm. It is not anticipated that INTO will present more galvanic corrosion problems than does NTO. Measurements of the vapor pressures and freezing points of INTO solutions have been initiated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1966
- Accession Number
- AD0486476
Entities
People
- Hubert E. Dubb