Corrosion Mitigation of Metallic and Alloy Substrates Using Nanofluids Based Coolants

Nanofluids are stable colloidal suspensions of nanoparticles in solvents. This research topic has evolved over the past few decades as promising candidates for a variety of applications due to attractive tunable material properties. This study is focused on ascertaining the corrosion mitigation characteristics of nanofluids, especially for metallic substrates. Electrochemical experiments were performed in this study to evaluate the corrosivity of different nanofluids. To evaluate the feasibility of adding nanoparticles to coolants, aluminum and brass surfaces were exposed to 0.01 M NaCl water solutions doped with silica nanoparticles at concentrations of 0.05% and 0.1% by mass, along with sodium dodecyl benzene sulfonate (SDBS) at 0.1% by mass. The results showed that the relative corrosivity of the nanofluid samples is highly sensitive to the material properties of the test coupons. Both brass and aluminum demonstrated improved corrosion resistance upon the introduction of silica SDBS additives into the fluid.