Accession Number : AD0474578


Title :   HYDROGEN MOVEMENT IN STEEL--ENTRY, DIFFUSION, AND ELIMINATION,


Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OH DEFENSE METALS INFORMATION CENTER


Personal Author(s) : Fletcher, E Ellis ; Elsea, Arthur R


Report Date : 30 Jun 1965


Pagination or Media Count : 84


Abstract : This report discusses the ways in which H2 enters steels, how it moves through steel, and methods whereby it may be removed from steel. The solubility of H2 is important in understanding other aspects of the behavior of H2 in steel and such aspects of solubility as preferred lattice sites, lattice expansion, measurements of solubility, and estimates of equilibrium H2 pressure in steel are discussed. The permeation of H2 through steel consisting of interactions at both the entry and exit surfaces of the metal as well as diffusion through the bulk metal is discussed. The various possibilities of H2 entry by corrosion processes, electrochemical processes, and other means are considered as well as factors which influence the rate of H2 removal from iron and steel. (Author)


Descriptors :   *HYDROGEN , *STEEL , *IRON , HYDROGEN , IMPURITIES , SOLUBILITY , CRYSTAL LATTICES , CRYSTAL DEFECTS , PHASE STUDIES , DIFFUSION , PERMEABILITY , HIGH TEMPERATURE , CORROSION , CATHODIC PROTECTION , PROCESSING , ELECTROLYSIS , ELECTROPLATING , SURFACE PROPERTIES , MICROSTRUCTURE , HYDROGEN EMBRITTLEMENT , DEUTERIUM , TRITIUM


Subject Categories : Properties of Metals and Alloys


Distribution Statement : APPROVED FOR PUBLIC RELEASE