Flow Decay
Abstract
The compound Fe(NO3)3.N2O4 (NO(+)Fe(NO3)4(-)) was previously identified as the principal constituent of deposits responsible for flow-decay of liquid propellant N2O4 in steel systems. In the light of this, an extensive investigation of N2O4 adducts of Fe(NO3)3 has been carried out including synthesis, analysis, vibrational spectroscopy and X-ray studies. The work indicates that the constituent species of the solid adducts Fe(NO3)3(x)N2O4 (where x is typically 1.0-1.5) are NO(+), NO(+) (solvated by NO2 or N2O4), Fe(NO3)4(-), and N2O4. The behaviour of these adducts has also been studied in HNO3 solution and in HNO3/N2O4 mixtures. The properties of the Fe(NO3)3(x)N2O4/ HNO3/N2O4 system are interpreted in terms of a gross modification of the HNO3/ N2O4 phase diagram by Fe(NO3)3(x)N2O4. A flow apparatus has been constructed so that flow-decay deposit may be collected and its chemical identity and physical form studied as a function of the 'water' (HNO3) content of N2O4 (monitored by H n.m.r.). A number of projected investigations is also discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1971
- Accession Number
- AD0728731
Entities
People
- C. C. Addison
Organizations
- University of Nottingham