Tribological exams ended up completed employing a ball-on-disc T-eleven tester. The balls were being fabricated from metal, While the discs have been made from steel, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The outline in the device plus the strategies is presented while in the literature (Szczerek and Tuszyński https://johnnybkuaj.ampedpages.com/not-known-details-about-anionic-cationic-59148318