Ni0.5Zn0.5Fe2O4 as a Potential Corrosion Inhibitor for API 5L X80 Steel in Acidic Environment

Corrosion inhibitors are widely used in acid solutions during pickling, cleaning/descaling of boilers and several other industrial applications. Mostly the organic compounds containing N, O and S are employed; however they are high toxic and environmentally non-friendly. In this study, the inhibition performance of nano-powder of ferrites of Ni, Zn and Fe in varying concentrations of 1M sulphuric acid on the corrosion behavior of API 5L X80 steel has been investigated. The nano-powder has been characterized using TEM, FESEM, XRD and its corrosion behavior in 1M H2SO4 has been studied using various advanced electrochemical tools such as EIS and potentiodynamic polarization (PD). It has been found that under the given acidic conditions, ferrites act as efficient corrosion inhibitors of steel. The order of inhibition effcencies of ferrite concentrations is 0.008> 0.01> 0.05> 0.07> 1M sulphuric acid. This inhibition is considerable and can be of significant importance for the oil and gas industry