The tribological effects of nanofluids, the suspensions of nanoparticles in ordinary coolants, on heat-exchanger materials are largely unknown. Previous research explored wear on heat-exchanger materials from distilled-water-base nanofluids only, while most engine-coolants are alcohol solutions in water. In this research work the authors tested of aluminum and copper by jet impingement of 50%-ethylene-glycol in water solution and of its 2%-alumina nanofluid. The observed modifications showed that such nanofluid led to wear patterns that were different than those obtained with the base-fluid. Same tests also were performed with distilled water and its nanofluid as references. The results suggests that nanopowders can substantially enhance wear by decreasing the anticon-osion action of ethylene glycol by a synergetic mechanism of erosion-corrosion.
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