NDLI: Ssme main combustion chamber (mcc) 'hot oil' dewaxing

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Ssme main combustion chamber (mcc) 'hot oil' dewaxing

Content Provider	NASA Technical Reports Server (NTRS)
Author	Akpati, Anthony U.
Copyright Year	1994
Description	In an attempt to comply with the changing environmental regulations, a process was developed for the replacement of perchloroethylene in the dewaxing of the Space Shuttle Main Engine (SSME) Main Combustion Chamber (MCC) and other associated hardware filled with the Rigidax(registered mark) casting compound. Rigidax(registered mark) is a hard blue-dyed, calcium carbonate filled thermoplastic casting compound (melting point 77 C) that is melted and poured into hardware cavities to prevent contamination during material removal processes, i.e. machining, grinding, drilling, and deburring. Additionally, it serves as a maskant for designated areas during electroforming processes. Laboratory testing was conducted to evaluate seven alternate fluids for the replacement of perchloroethylene in the dewaxing process. Based upon successful laboratory results, a mineral oil was selected for testing on actual hardware. The final process developed involves simultaneous immersion and flushing of the MCC channels using a distinct eight stage process. A nonvolatile hydrocarbon analysis of a solvent flush sample is performed to determine the hardware cleanliness for comparison to the previous perchloroethylene dewaxing process.
File Size	1655971
Page Count	27
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19960049712
Archival Resource Key	ark:/13960/t8cg4n844
Language	English
Publisher Date	1994-08-10
Access Restriction	Open
Subject Keyword	Spacecraft Propulsion And Power Solvents Temperature Dependence Cleanliness Metal Finishing Performance Tests Calcium Carbonates Hydrocarbons Laboratory Equipment Cleaners Dewaxing Casting Time Dependence Space Shuttle Main Engine Mineral Oils Combustion Chambers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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