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Seal Materials Compatible with the Electroplating Solvent Used in Constellation-X MirrorsThe existing gasket seals used in electroplating of the Constellation-X mirrors are difficult to assemble, and the current seal material is hydrophobic and too thick. The combination of the above problems result in: 1) non-uniform plating; 2) defect sites such as pits on the mirror edges; 3) "bear claws" on the edges of the mandrels and mirrors causing difficulties in shell-mirror separations; and 4) leakage of the plating solution past the seals into the mandrel causing chemical etching of the mandrel interior. This paper reports the results of this summer study in searching for alternate seal materials chemically compatible with the electroplating solvent. Fifteen common elastomeric rubber seal materials made-by Parker Seals were investigated including butyl, ethylene propylene, fluorosilicone, nitrile, Viton fluorocarbon, and silicone. Test results showed that Viton fluorocarbon compounds as a group were superior to the other tested compounds for chemical compatibility with the plating bath.
Document ID
20020043261
Acquisition Source
Headquarters
Document Type
Other
Authors
Pei, Xiong-Skiba
(Austin Peay State Univ. Clarksville, TN United States)
Date Acquired
August 20, 2013
Publication Date
October 1, 1999
Publication Information
Publication: 1999 NASA/ASEE Summer Faculty Fellowship Program
Subject Category
Mechanical Engineering
Funding Number(s)
CONTRACT_GRANT: NGT8-52874
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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