NASA-LLIS-3097

Lessons Learned - Impurities in Propellant-Grade Ammonia Can Lead to Corrosion and Poor Hardware Performance

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:53:00Z
date available	2017-09-04T17:53:00Z
date copyright	05/18/2010
date issued	2010
identifier other	FDMGFDAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std/handle/yse/176219
description abstract	Abstract: Leaks in the Space Shuttle ammonia boiler system, as well as a single instance of a boiler shutdown during postflight operation, led to a review of the materials and processes used in the ammonia boiler. Failure analysis was performed and concluded that the corrosion was caused by high levels of chloride in the procured ammonia and that the shutdown was due to high levels of polyethylene oxide (PEO) in the propellant-grade ammonia. Since the switch to higher-purity, technical-grade ammonia, there have been no ammonia boiler leaks or shutdowns.
language	English
title	NASA-LLIS-3097	num
title	Lessons Learned - Impurities in Propellant-Grade Ammonia Can Lead to Corrosion and Poor Hardware Performance	en
type	standard
page	1
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;2010
contenttype	fulltext
subject keywords	Engineering design and project processes and standards
subject keywords	Environmental Control and Life Support Systems
subject keywords	Long term sustainability and maintenance planning