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There have been increased interests in using nanoparticle-based anticorrosion pigments in various industrial applications such as working fluids, lubricants, oil and gas fields, cooling water, anticorrosion coatings etc. In this article, nano-nickel ferrite used as corrosion inhibitor pigment for carbon steel in 1 M sulphuric acid and 3.5% NaCl solutions. The pigment has been characterized using Transmission electron microscopy and X-ray diffraction. Effects of solutions having varying concentrations of the pigment on corrosion response are studied using electrochemical cell via open circuit potential, electrochemical impedance spectroscopy, linear polarization resistance and potentiodynamic methods. Results indicate that the corrosion inhibition is inversely proportional to increasing cations concentrations. Increased corrosion with increasing cations concentration has been attributed to the domination of galvanic …