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Erosion-Corrosion Wear of Heat-Exchanger Materials by Water/ Ethylene-Glycol/Alumina Nanofluids

机译:水/乙烯-乙二醇/氧化铝纳米流体对换热器材料的冲蚀磨损

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摘要

Nanofluids are suspensions of nanoparticles in ordinary coolants, but their tribological effects on heat-exchanger materials are unknown. Previous research has explored wear from distilled-water-base nanofluids only, while most engine-coolants are alcohol solutions in water. This article presents testing of aluminum and copper by jet impingement of 50%-ethylene-glycol in water solution and of its 2%-alumina nanofluid. The effects are investigated of nanoparticle addition on the anticorrosion protection provided by ethylene glycol. The observed modifications showed that ethylene-glycol in water nanofluid led to wear patterns that were different than those obtained with the base-fluid; nanoalumina addition enhanced erosion and corrosion on aluminum and copper. Comparing the effects of ethylene glycol and its nanofluid solutions to those from same tests performed with distilled-water and its nanofluid suggests that nanopowders can substantially enhance wear by decreasing the anticorrosion action of ethylene glycol by a synergetic mechanism of erosion-corrosion.
机译:纳米流体是纳米颗粒在普通冷却剂中的悬浮液,但是它们对热交换器材料的摩擦学影响尚不清楚。先前的研究仅探索了基于蒸馏水的纳米流体的磨损,而大多数发动机冷却剂是水中的酒精溶液。本文介绍了通过50%乙二醇水溶液及其2%氧化铝纳米流体的射流撞击测试铝和铜。研究了纳米颗粒添加对乙二醇提供的防腐保护的影响。观察到的变化表明,水纳米流体中的乙二醇导致的磨损模式与基础流体所产生的磨损模式不同。纳米氧化铝的添加增强了铝和铜的腐蚀和腐蚀。将乙二醇及其纳米流体溶液的效果与用蒸馏水及其纳米流体进行的相同测试的效果进行比较,结果表明,纳米粉末可通过腐蚀-腐蚀的协同作用机理降低乙二醇的抗腐蚀作用,从而显着提高磨损。

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