Standard Test Method for Determination of pHe of Denatured Fuel Ethanol and Ethanol Fuel Blends

Importancia y uso:

5.1 The hydrogen ion activity, as measured by pHe, is a good predictor of the corrosion potential of ethanol fuels. It is preferable to total acidity because total acidity does not measure activity of the hydrogen ions; overestimates the contribution of weak acids, such as carbonic acid; and can underestimate the corrosion potential of low concentrations of strong acids, such as sulfuric acid.

Subcomité:

D02.A0.02

Referida por:

D4806-25, D5798-25, D4806-25, D4806-25

Volúmen:

05.02

Número ICS:

27.060.10 (Liquid and solid fuel burners)

Palabras clave:

automotive spark ignition engine fuel; corrosion potential; denatured fuel ethanol; ethanol; ethanol fuel blends; ethanol-hydrocarbon blends; fuel ethanol; hydrogen ion activity; pHe;