Corrosion behaviour of 304 austenitic stainless steel in simulated oilfield produced water at similar to 25 degrees C was investigated. The electrochemical properties of 304 stainless steel were assessed experimentally employing potentiodynamic polarisation and electrochemical impedance spectroscopy measurements. The corrosion mechanism of 304 stainless steel in simulated oilfield produced water along with appropriate modelling equivalent electrical circuits were deducted. Results showed that the corrosion rate is reduced with time. This behaviour does not indicate protection of 304 stainless steel. Instead, pits were formed on the surface of the specimens, and their evolution continued with time.