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The Compatibilty Of Materials With Chlorine Trifluoride, Perchloryl, Flouride and Mixtures Of These

Report Number: WADD TR 61-54
Author: Grigger, John C.
Author: Miller, Henry C.
Corporate Author: Pennsalt Chemicals Corporattion
Laboratory: Materials Central
Date of Publication: 1961-04
Pages: 108
Contract: AF 33(616)-6796
Project: 7312
Task: 73122
AD Number: AD0266391

Compatibility and corrosion rates of alloys of aluminum, copper, magnesium, nickel, titanium, steel and stainless steel, and columbium, molybdenum, carbon, graphite and fluorocarbon plastics in chlorine trifluoride, perchloryl fluoride and mixtures of these at 30°C. were investigated. Titanium, columbium, molybdenum, carbon and graphite were rapidly attacked in ClF3. Corrosion rates of others were extremely low in all liquids. In the vapors, instances of higher corrosion rates were noted. Teflon and Kel-F adsorbed moderate amounts of ClF3 and ClO3F. Passivation by ClF3 was unnecessary for reducing corrosion of properly cleaned metals. Corrosion in wet ClO3F was characterized by localized attack, but some stainless steels were resistant. Titanium exhibited increasing impact ignition in liquid ClO3F beginning at 19 ft.-lbs., but even at 140ft.-lbs. burning was not sustained. No other metals showed impact ignition in ClF3 or ClO3F. In explosive shock tests, ClO3F gave a stronger interaction with the metals tested than did ClF3, and aluminum showed a greater interaction with the fluorine chemicals than low carbon or stainless steel. Greatest enhancement of explosive shock occurred with titanium and ClO3F. In explosive denting and perforation of steel and aluminum cylinders containing ClF3, ClO3F and their mixtures, no enhancement occurred. A high order explosive interaction occurred between ClO3F and titanium cylinders perforated by a shaped explosive charge.

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