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Author Farber, M.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword METALS, CERAMICS, AND MATERIALS ♦ ACTIVATION ♦ CHROMIUM ♦ COPPER ♦ CORROSION ♦ ELECTRICITY ♦ ENERGY ♦ HIGH TEMPERATURE ♦ HYDROCHLORIC ACID ♦ IRON ♦ MEASURED VALUES ♦ NICKEL ♦ NICKEL ALLOYS ♦ REACTION KINETICS ♦ STAINLESS STEELS ♦ TUNGSTEN ♦ VAPORS ♦ WATER
Abstract An experimental study was made of the hightemperature reaction rates of various metal filaments with HCl and H/sub 2/0 vapors and mixtures of the two. Measurements were made by an electrical method in which the change in resistance of the metal filament was related to the loss in pure metal due to the vapor- metal reaction. Measurable reaction rates were determined for both nickel and iron in a temperature range from 1000 to 1600 deg K. Specific reaction rate constants and apparent activation energies are presented. The reaction rates of tungsten with H/sub 2/0 vapor were measured in a temperature range from 1600 to 2000 deg K. The reaction rates of chromium, Inconel, stainless steel 18-8, and tungsten did not proceed af a measurable rate in either pure HCl or in mixtures of HCl and H20. Nickel, copper, inconel, and stainless steel 18-8 did not react appreciably with water vapor at temperatures approaching the melting points. The reaction rates for iron in pure HCl varied from 0.03 to 0.04% area loss per second over the temperature range investigated with an apparent activation energy of 10.5 kcal/mole. The reaction rates of iron in mixtures of HCl and H20 varied from 0.08 to 0.17% area loss per second in the same temperature range with an apparent activation energy of 8.5 kcal/mole. Reaction rates of nickel in pure HCl varied from 0.005 to 0.03% area loss per second in the temperature range of 1000 to 1600 deg K with an apparent activation energy of 13 kcal/mole. The reaction rates of nickel in ihe HCl and H/sub 2/0 mixtures varied from 0.004 to 0.03% area loss per second in the same temperature range with an apparent activation energy of 22 kcal/mole below 1300 deg K and 13 kcal/mole above ihis temperature. Reaction rates of iron in H/sub 2/0 vapor varied from 0.002 to 0.05% area loss per second from 1120 to 1415 deg K with an activation energy of 28 kcal/mole. Reaction rates of tungsten in H/sub 2/0 vapor varied from 0.02 to 0.03% area loss per second from 1700 to 2000 deg K with an activation energy of 14.5 kcal/mole. (auth)
ISSN 00134651
Educational Use Research
Learning Resource Type Article
Publisher Date 1959-09-01
Publisher Department Rocket Power, Inc., Pasadena, Calif.
Journal Journal of the Electrochemical Society
Volume Number 106
Organization Rocket Power, Inc., Pasadena, Calif.


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