Verfahren zum Messen von Spannungspotentialen in öligen Flüssigkeiten

摘要

The invention relates to a method for determining the chemical reactivity, specially corrosiveness, of an oily liquid or impurities therein, whereby a field effect transistor with an ion-sensitive gate electrode is used and a reference potential is created by means of a chemically reactive reference electrode, preferably the metal housing of the oil container, and the potential difference arising from redox reactions can be detected in the field effect transistor. The inventive method uses no reagent and does not reinforce the naturally occurring chemical reactions on the metal surface. Consequently, it is particularly suitable for continuous measurement of corrosiveness in mineral oils. Water content can also be determined.