Double Lap Shear Testing of Coating Modified Ice Adhesion to Liquid Oxygen Food Line Bracket, Space Shuttle External Tank

The brackets that secure the liquid oxygen feed line to the external tank are known locations of frost and ice growth during the period following fuel loading. This experiment quantified the reduced adhesion when ice phobic coating were applied to test coupons simulating the bracket surface. Double...

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Bibliographic Details
Main Authors: Ferrick, M. G., Mulherin, N. D., Haehnel, R. B., Coutermarsh, B. A., Durell, G. D., Tantillo, T. J., St.Clair, T. L., Welser, E. S., Cano, R. J., Smith, T. M., Martinez, E. C.
Other Authors: ENGINEERING RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
Format: Text
Language:English
Published: 2006
Subjects:
Inorganic Chemistry
Snow
Ice and Permafrost
Containers and Packaging
Test Facilities
Equipment and Methods
*ICE FORMATION
*COATINGS
*TANKS(CONTAINERS)
*LIQUID OXYGEN
*SPACE SHUTTLES
*SHEAR TESTS
TEST AND EVALUATION
POSITION(LOCATION)
TEMPERATURE
ICE
TEMPERATURE CONTROL
MOUNTING BRACKETS
FEEDING
RANGE(EXTREMES)
FROST
PATTERNS
EXTERNAL STORES
ALUMINUM
REDUCTION
CONSISTENCY
ADHESION
PROTOTYPES
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA447148
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA447148
Description
Summary:The brackets that secure the liquid oxygen feed line to the external tank are known locations of frost and ice growth during the period following fuel loading. This experiment quantified the reduced adhesion when ice phobic coating were applied to test coupons simulating the bracket surface. Double lap shear testing of coated and uncoated coupons provided robust test specimens and consistent load response patterns with exceptional resolution. For these tests ice was grown as strong and consistently as possible, subject to temperature decreases comparable to those of the prototype bracket, and tested at a controlled temperature of -112 degrees C. The tests evolved in three phases, with uncoated controls included in each group of tested samples. The first phase of testing evaluated a wide range of coatings, and showed that Rain-X mixed with MP-55 powdered Teflon (RXM) was outstanding coating to reduce ice adhesion to Koropon coated aluminum. The original document contains color images.

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