|Source||United States Department of Energy Office of Scientific and Technical Information|
|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)|
|Learning Resource Type||Article|
|Publisher Department||Rocket Power, Inc., Pasadena, Calif.|
|Journal||Journal of the Electrochemical Society|
|Organization||Rocket Power, Inc., Pasadena, Calif.|
Ministry of Human Resource Development (MHRD) under its National Mission on Education through Information and Communication Technology (NMEICT) has initiated the National Digital Library of India (NDLI) project to develop a framework of virtual repository of learning resources with a single-window search facility. Filtered and federated searching is employed to facilitate focused searching so that learners can find out the right resource with least effort and in minimum time. NDLI is designed to hold content of any language and provides interface support for leading vernacular languages, (currently Hindi, Bengali and several other languages are available). It is designed to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is being developed to help students to prepare for entrance and competitive examinations, to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is being developed at Indian Institute of Technology Kharagpur.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Human Resource Development (MHRD), through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
For any issue or feedback, please write to email@example.com