Accession Number : AD0285093

Title :   ADHESION-SHEAR STRENGTH OF ICE FROZEN TO CLEAN AND LUBRICATED SURFACES

Descriptive Note : Interim rept.

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : FORD,T.F. ; NICHOLS,O.D.

Report Date : 30 AUG 1962

Pagination or Media Count : 13

Abstract : The adhesion-shear strength of ice to bulk plastics, plastic films, lubricated plastics, and lubricated metals has been measured at three temperatures. The bulk plastics used were nylon, polyethylene, and Teflon; the plastic films were Teflon and two polymerizable silicones. The adhesion strength of ice frozen to clean bulk nylon and polyethylene and to clean Teflon films was higher than for ice frozen to bulk Teflon. In most cases the laboratory tests show self-detachment of the ice from bulk Teflon at -1 and -20 C, but not at -6 C. Adhesion of ice to clean bulk plastics and to plastic films is low compared with that to metals, but still too high for ease of separation. Ice was removed easily from lubricated plastics. With some plastic-lubricant systems as many as 12 zero-adhesion freeze-shearthaw cycles were obtained in laboratory tests before replenishing the lubricant; on metals, five or six cycles were possible. Experiments indicate that an effective coating must be a fluid or semifluid material on which the ice will slide and which will resist displacement by water through several icing-deicing cycles. Bis(2ethylhexyl) sebacate and silicone greases are promising materials. (Author)

Descriptors :   *ADHESION, *METALS, *PLASTICS, COATINGS, ETHYLENES, FILMS, ICE, LUBRICATION, NYLON, OILS, POLYMERS, SILICONES, SURFACES, TEMPERATURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE