Organic surfactant based corrosion inhibitors have been used to control corrosion in challenging environments in oil and gas production. As these environments become harsher the amount of corrosion inhibitor required to mitigate the corrosion increases. Increasing the amount of corrosion inhibitor (i.e. surfactant) may impact separation of the oil and water. In the process of selecting the appropriate corrosion inhibitor one major factor that should be considered is the corrosion inhibitor’s impact on emulsion stability. Thus a test to determine the extent to which a particular CI will impact oil/water separation is a necessity. This paper will address some factors that impact emulsion stability in the presence of corrosion inhibitors various methods for determining emulsion tendency and how changing water cuts can drastically alter the emulsion stability.