When converting between measurement standards, what is a common conversion factor for mV SCE to mV CAS?

When converting from millivolts referenced to a saturated calomel electrode (mV SCE) to millivolts referenced to a silver/silver chloride electrode (mV CAS), a common conversion factor of 1.2 is used. This is due to the specific electrochemical characteristics and reference potentials of the two electrode types.

The saturated calomel electrode has a known and stable potential relative to the standard hydrogen electrode (SHE), while the silver/silver chloride electrode has a different reference potential. The conversion factor accounts for the difference in potential between these two electrodes, capturing the shift in voltage readings that may be observed when transitioning from one reference to the other in electrochemical measurements.

Understanding this conversion is crucial for ensuring accuracy in interpreting and comparing electrochemical data, especially in corrosion science and other fields that rely on precise electrode potentials.