Ionic Monopropellant Compatibility Study

Metadata Updated: November 12, 2020

High performance green monopropellants require means of detection and remediation of spills and residues. This project investigated color tests for spill detection and methods for remediation. Innovation was achieved using COTS test kits, and both fundamental and novel chemistry applied to the monopropellant ingredients.  The second phase examined candidate materials for use in AF-M315E propulsion systems. Pairs of representative alloys, passivated and native, were immersed in AF-M315E at 71 °C for 31 d, fluid samples were periodically characterized and post-test materials and fluids were finally characterized. Typical corrosion studies use only the total time of immersion; this study also obtained interim data points.  The image shows a surface treated alloy on the left and the untreated alloy on the right.Candidate hydrazine alternatives have been developed for spacecraft propulsion. The U.S. Air Force AF-M315E and the Swedish ammonium dinitramide propellants have received the most attention, while ammonium dinitramide propellants are a possible contender. While greenness relates to environmentally benign and relative toxicity, neither of these propellants is completely "nontoxic" or completely safe; if their energetic nature was not inherent they would not be used as monopropellants. This is particularly important with ammonium dinitramide (ADN) and hydrazinum nitroformate (HNF) propellants, which ESA and the EU has favored while the U.S. Air Force has focused on AF-M315E and the U.S. Army has investigated hydroxylammonium nitrate/triethanolammonium nitrate (HAN/TEAN; XM-46) propellants.  The first phase of the project's focus will be to evaluate detection and decontamination methods for these propellants.  The second phase examined candidate materials for use in AF-M315E propulsion systems. Pairs of representative alloys, passivated and native, were immersed in AF-M315E at 71 °C for 31 d, fluid samples were periodically characterized and post-test materials and fluids were finally characterized. Typical corrosion studies use only the total time of immersion; this study also obtained interim data points.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Maintainer
Identifier TECHPORT_12072
Data First Published 2013-09-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Homepage URL https://techport.nasa.gov/view/12072
Program Code 026:027
Source Datajson Identifier True
Source Hash 29a7affa7c496b8e02819fdbaada5610b8bd6f5c
Source Schema Version 1.1

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