Effect of TiO2 nanoparticles and SDBS on corrosion behavior of 3003 aluminum alloy in aqueous ethylene glycol containing chloride ions at high temperature

The antifreeze mainly composed of aqueous ethylene glycol is easily contaminated with chloride ions, which will accelerate corrosion of aluminum alloy in the components of the engine heat transfer system at long-term high temperatures. In the present work, corrosion behavior of 3003 aluminum (Al) alloy with the addition of TiO2 nanoparticles and sodium dodecyl benzene sulfonate (SDBS) in aqueous ethylene glycol (EGW) containing chloride ions at 88 degrees C was examined. The corrosion behavior of 3003 Al alloy was investigated by potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). The scanning electron microscopy (SEM), energy dispersion X-ray (EDX) and Fourier transform infrared spectroscopy (FT-IR) were used to explore the morphology, structure, and composition of the sediment on the alloy surface. And the Turbiscan Lab (TLAB) dispersion stability analyzer was utilized to test the dispersion stability of TiO2 nanofluids. The experimental results demonstrated that the co-existence of TiO2 and SDBS performed the significant corrosion inhibition, and can protect alloy from chloride ions. (c) 2021 Elsevier B.V. All rights reserved.