SYMPOSIA PAPER Published: 01 January 1983
STP29506S

Effect of Sodium and Potassium on the Hot Corrosion of Gas Turbines

Source

The determination of a specification for trace metal corrosion-causing contaminants in coal-derived fuels depends on the corrosion resistance of gas turbine hot gas path materials to the deposits produced during the combustion of such fuels. The contaminants of principal concern are compounds of sodium and potassium, which produce deposits of sodium and potassium sulfate.

This report gives the results of small burner rig (SBR) accelerated corrosion tests with state-of-the-art alloys and coatings for the combustion of distillate fuel doped with sodium and potassium chlorides. The SBR data on the deposit chemistry and corrosion rates are analyzed to give corrosion data for turbine hot gas path components as a function of fuel trace metal contamination. The modes of corrosion attack when sodium and potassium are present in comparison with those when only sodium is present (distillate case) are discussed.

Author Information

Haskell, RW
General Electric Co., Schenectady, N.Y.
Doering, HvonE
General Electric Co., Schenectady, N.Y.
Grzybowski, DF
General Electric Co., Schenectady, N.Y.
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Details
Developed by Committee: D02
Pages: 156–179
DOI: 10.1520/STP29506S
ISBN-EB: 978-0-8031-4875-8
ISBN-13: 978-0-8031-0258-3