Accession Number:

ADA224999

Title:

Processes for Assessing the Thermal Stability of Han-Based Liquid Propellants. Revision

Descriptive Note:

Final rept. Oct 1985-Oct 1988

Corporate Author:

FRAUNHOFER-INST FUER CHEMISCHE TECHNOLOGIE BERGHAUSEN (GERMANY F R)

Report Date:

1990-07-01

Pagination or Media Count:

82.0

Abstract:

Liquid Propellants containing hydroxylammonium nitrate HAN react with metallic and non-metallic impurities. Two tests were developed to monitor gas evolution during storage at 90 C in 5-cc sealed glass ampoules or 3-cc glass containers fitted with miniature pressure transducers. Time to bursting of the ampoule or to a specific pressure in the container are the data obtained. The propellants stability is dependent on pH with 2.1 being optimum. The effects of numerous metals, both as elements and ions, and plastics on the stability of LGP1846 are examined. Iron, copper, and vanadium ions caused the most reaction, and vanadium shows an effect at concentrations as low as 0.5 ppm. Magnesium, zinc, and manganese ions had no effect in storage life by this test criterion. Of the 30 metals and alloys investigated, 2 gunmetals and 3 stainless steels were subject to pronounced attack, but gold, silver, and tantalum remain unaffected. Keywords Liquid propellants, HAN, Decomposition, Thermal stability, Stabilizers, Chemical analysis, Glass ampoules, Storage life. jes

Subject Categories:

  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE