Jet-Impingement Effects of Alumina-Nanofluid on Aluminum and Copper

Figure 4

Optical microscopy images of 3003-T3 aluminum before and after (112-hour) test with (reference fluid, without nanoparticles) 50/50% ethylene glycol/water (magnification: 5000x). Preexisting pitting and enlarged ones after treatment are circled.