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Field electrochemical measurements of corrosion characteristics of materials in hypersaline geothermal brine [electronic resource]

Geothermal Legacy.

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Bibliographic Details
Online Access: Online Access
Corporate Author: Lawrence Livermore National Laboratory (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Livermore, Calif : Oak Ridge, Tenn. : Lawrence Livermore National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1977.
Subjects:
Information.
Diagrams.
Kinetics.
Corrosion.
Geothermal Fluids.
Images.
Brines.
Chemical Reaction Kinetics.
Testing.
Electric Potential.
Flowsheets.
Chromium Steels.
Fluids.
Alloys.
Steels.
Corrosion Protection.
Research Programs.
Iron Base Alloys.
Tables.
Titanium Alloys.
Temperature Measurement.
Scaling.
Materials Testing.
Corrosive Effects.
Ph Value.
Stainless Steels.
High Temperature.
Flow Rate.
Redox Potential.
Chromium Alloys.
Salton Sea Geothermal Field.
Chemical Reactions.
Polarization.
Geothermal Fields.
Acidification.
Reaction Kinetics.
Chromium-molybdenum Steels.
Iron Alloys.
Electrochemical Cells.
Corrosion Resistant Alloys.
Materials Science.
Geothermal Energy.
Description
Summary:Geothermal Legacy.
Abstract:A flow cell (with appropriate accessories) was developed for use in short-term testing of the corrosion behavior of materials in approximately 100°C, hypersaline geothermal brine. The apparatus was designed to accommodate commercial (Petrolite) corrosion measurement equipment and conducted experiments on-line at the Lawrence Livermore Laboratory Test Station in the Salton Sea Geothermal Field. The apparatus also permitted direct readings of corrosion potentials, solution redox potential (E{sub h}), brine flow rate, pH, and temperature. Estimates of general corrosion rates were obtained by the linear polarization resistance technique and from measurements of complete potentiodynamic polarization curves. The latter also afforded predictions of pitting susceptibilities of active-passive type materials. Twenty-two alloys (with various heat treatments) were tested and readily grouped according to general corrosion resistances in acidified hypersaline (approximately 4 M chloride) brine. Especially promising in regard to corrosion resistance-vs-cost is the series of low Cr--Mo steels. Prescaling of materials in unacidified (pH approximately 5.7) brine prior to exposure to acidified (pH 2 to 4.5) brine was found to be beneficial in reducing corrosion rates at 100°C.
Item Description:Published through the Information Bridge: DOE Scientific and Technical Information.
12/13/1977.
"ucrl-52376"
Goldberg, A.; McCright, R.D.; Harrar, J.E.
Physical Description:Pages: 24 : digital, PDF file.

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