Effect of Filler Loading on Erosive Characteristics of Epoxy/SiO2 Coatings
Abstract
Epoxy is among of the most commonly coatings used in the industry that for their wear resistance and excellent adhesion to metal surfaces. The present work investigates the solid particle erosion of coating layer made of SiO2 nanoparticles reinforced epoxy. The epoxy coatings prepared by adding SiO2 nanoparticles directly into the epoxy matrix which was previously diluted by Thinner. Erosion wear was evaluated using a solid impact erosion tester, sand particles with different sizes varied from 150 to 300 µm, the impact distance was 15 and 20 cm at impingement angles of 30°, 60° and 90°. The ratio of weight loss to the weight of the impact particles produces this loss is computed as the erosion rate. The results show that the erosion rate was higher when the particles impact with an impingement angle of 60° than at 30°, and 90°. The resultant Epoxy/SiO2 nano-coatings exhibit excellent anti-wear performance than the neat epoxy. The abrasive resistance and hardness value of epoxy coatings enhanced approximately 70 % and 24 %, respectively on loading of SiO2 nano filler.
