I am trying to do some basic electrochemical corrosion tests (OCP, EIS, LPR) on steel samples in an oil-based lubricant. The resistivity of the oil poses a problem for the measurements of potential and impedance. So to minimize this, I coated a silver wire with AgCl and use it bare in the lubricant as a reference electrode. I am using a graphite rod as a counter electrode and there is about 0.5 cm of space between the sample and reference electrode and the same between the counter and reference.

I ran OCP and EIS. The results are noisy and inconsistent. OCP is giving huge ranges of -10V-3V and EIS gives impedances at 1 Hz ranging from 4-400 GOhm. My questions are:

1. Is the use of a AgCl electrode bare (without KCl surrounding it) viable?

2. Are there other options to get accurate measurements in an oil-based lubricant?

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