Thermodynamics of corrosion for geothermal systems

Conference · Mon Dec 31 23:00:00 EST 1979 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:5139436

Macdonald, D

Potential-pH diagrams, which summarize the thermodynamic properties of a system, are extensively used for interpreting the corrosion behavior of metals in condensed media. In this paper, E-pH diagrams are presented for iron and nickel in sulfide-containing high-salinity geothermal brine at 25/sup 0/C and 250/sup 0/C. The diagrams have been constructed on the assumption of a constant total sulfide constraint which leads to nonlinearity of the equilibrium relationships in potential-pH space. The application of these diagrams in the interpretation of chemical and corrosion processes in geothermal systems is briefly discussed. 19 refs.

• Research Organization: Ohio State Univ., Columbus
• OSTI ID: 5139436
• Report Number(s): CONF-790283-; CONF-7904194-
• Journal Information: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Vol. 717; ISSN ASTTA
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150903 -- Geothermal Engineering-- Corrosion
Scaling & Materials Development
152001* -- Geothermal Data & Theory-- Properties of Aqueous Solutions
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
CHALCOGENIDES
CHEMICAL REACTIONS
CORROSION
ELEMENTS
FLUIDS
GEOTHERMAL FLUIDS
HIGH TEMPERATURE
IRON
MEDIUM TEMPERATURE
METALS
NICKEL
PH VALUE
PHYSICAL PROPERTIES
SCALING
SULFIDES
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS