The Effect of Salt and Sea-Water Contamination on the Mechanical Properties of Cord and Webbing.

摘要

The effects of immersing a braided nylon cord, a flax webbing and a nylon webbing in salt solutions of various concentrations and in sea water have been investigated. Increases in mass per unit length were related to salt concentration and the calculated unoccupied space within the structures. No reduction in strength could be attributed to sodium chloride crystals. Reductions in the strength of nylon webbing occurred after immersion in sea water, consistent with the increased local relative humidity due to the deliquescing substances present in sea water. Washing did not remove all the contaminant from webbing. The additional loss in strength due to immersion in sea water could be of concern in parachutes near the end of their Service life. (Author)