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Journal of Mechanical Engineering Science and Technology (JMEST)

Abstract

Corrosion of aluminum radiators can reduce cooling system reliability and shorten service life in automotive applications. This study examines the effect of TiO2-Al2O3 hybrid nanofluid concentration and temperature on the corrosion rate of commercially available aluminum radiator material. Hybrid nanoparticles with a TiO2-Al2O3 mass ratio of 50:50 were dispersed in distilled water at concentrations of 0.6 wt.%, 0.8 wt.%, and 1.0 wt.%. Corrosion behavior was evaluated using a 14-day accelerated immersion test at 60°C and 80°C, and the corrosion rate was determined using the gravimetric mass loss method. The results showed that the corrosion response was not linearly proportional to nanoparticle concentration. At 60°C, the lowest corrosion rate was observed at 0.6 wt.% with 0.000049 mm/year, corresponding to an 88.84% lower value compared with the room temperature distilled water baseline. At 80°C, the lowest corrosion rate was observed at 0.8 wt.% with 0.000027 mm/year, corresponding to a 93.85% lower value compared with the same baseline. In contrast, the 1.0 wt.% concentration produced higher corrosion rates, especially at 80°C, where the corrosion rate reached 0.003983 mm/year. This behavior may be associated with changes in particle distribution or suspension stability at higher nanoparticle loading, although further dispersion, electrochemical, and surface characterization is required to confirm the mechanism. Macroscopic surface observation showed visible localized corrosion features that qualitatively supported the gravimetric trend. These findings provide preliminary experimental evidence that the corrosion response of aluminum radiator material in TiO2-Al2O3 hybrid nanofluid depends on both nanoparticle concentration and immersion temperature within the tested range.

Publisher

State University of Malang (UM)

First Page

180

Last Page

196

Additional Files
JMEST_Revised_Copyeding_TrackChanges.docx (2184 kB)
Dear Editor, We have revised the manuscript according to the copyediting comments and journal template requirements. The revisions include clarification of replication and standard deviation, correction of figure decimal formatting, addition of error bars in Figure 2, revision of the Author Contribution, Conflict of Interest, and Artificial Intelligence statements, and adjustment of the reference format according to the JMEST style. Thank you for your kind consideration.
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