POTENTIAL-pH DIAGRAMS FOR THE TANTALUM-WATER SYSTEM AT ELEVATED TEMPERATURES. Conference Paper uri icon

abstract

  • The thermodynamic behavior of metals and alloys in high temperature aqueous systems is currently of great interest since it may be used to determine which corrosion processes are spontaneous under any given set of conditions. The thermodynamic properties are most commonly presented as potential-pH or Pourbaix diagrams in which equilibrium potentials for various reactions are plotted as a function of pH at the temperature of interest. These relationships define the boundaries of stability domains for various species, and hence provide a convenient format for presenting and displaying the thermodynamic equilibrium properties of any given system. Emphasis has been placed on assessing the effect of temperature on the thermodynamic properties of the metal itself and of various oxidation products which may be responsible for the high kinetic stability exhibited by tantalum in high temperature aqueous environments.

author list (cited authors)

  • Betrabe, H. S., Johnson, W. B., Macdonald, D. D., & Clark, W.

complete list of authors

  • Betrabe, HS||Johnson, WB||Macdonald, DD||Clark, WAT

publication date

  • December 1984