SYMPOSIA PAPER Published: 01 January 1993
STP15953S

Methods for Using Water Impingement in Lieu of Chlorofluorocarbon 113 for Determining the Non-Volatile Residue Level on Precision Cleaned Hardware

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Chlorofluorocarbon (CFC) 113 is currently in use at the John F. Kennedy Space Center as a cleaning verification solvent. A CFC 113 rinse is routinely used to verify that valves and other large components meet a non-volatile residue (NVR) requirement of less than 1 mg per 0.09 m2 (1 ft2) of surface area. The National Aeronautics and Space Administration plans to eliminate the use of CFC 113 for NVR analysis by 1995. Data is presented from a test program in progress to develop water impingement NVR processes. Contaminant removal tests were conducted on stainless steel test plates using three water impingement methods, liquid, steam, and gas/liquid. The use of total organic carbon analysis to determine the NVR cleanliness level is also discussed.

Author Information

Dearing, WL
Materials Science Laboratory, John F. Kennedy Space Center, FL
Bales, LD
Materials Science Laboratory, John F. Kennedy Space Center, FL
Bassett, CW
Materials Science Laboratory, John F. Kennedy Space Center, FL
Caimi, RE
John F. Kennedy Space Center, FL
Lafferty, GM
Materials Science Laboratory, John F. Kennedy Space Center, FL
Melton, GS
Materials Science Laboratory, John F. Kennedy Space Center, FL
Sorrell, DL
Materials Science Laboratory, John F. Kennedy Space Center, FL
Thaxton, EA
John F. Kennedy Space Center, FL
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Details
Developed by Committee: G04
Pages: 66–77
DOI: 10.1520/STP15953S
ISBN-EB: 978-0-8031-5236-6
ISBN-13: 978-0-8031-1496-8