A rotating cylinder autoclave test has been used to screen corrosion inhibitors for field testing. A number of seemingly insignificant variables have been found which can greatly affect the measured corrosion rate in the test which can affect the relative ranking of the inhibitors evaluated in the test. These variables include the brine stability, rotation
smoothness, CO2 pressure, coupon metallurgy, test duration, and selected inhibitor dosage. Other variables were noted in the course of the work and their effects on results quantified. The reproducibility of the test method has been significantly improved by elimination of each variable in a systematic manner.
Keywords: Inhibitor, rotating cylinder autoclave, CO2 corrosion