Development and Evaluation of Anti-Abrasion Polymer Coatings for Circulation Coins

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  • The motivation behind this research is to provide anti-abrasion abilities in attempt to increase the life span of coins in circulation. Polyurethane, polytetrafluoroethylene, advanced liquid glass, standard liquid glass and silicon R-2180 are selected and applied onto brass plated blank coins (loonies) and their wear resistance is investigated. Following coating application using a spin coater, polyurethane, advanced liquid glass and silicon R-2180 show satisfactory visual appearance. Pin-on-disc wear test is conducted on coated brass blanks; both advanced liquid glass and polyurethane exhibit superior results when compared to silicon R-2180. An additional abrasion test was carried out using a tumbling machine. Periodic tumbling is carried out in increments of 5 hr for 25 hr to assess the wear resistance of the three candidate materials. Over all, advanced liquid glass maintains 40% of the coating after 25 hr of tumbling compared to only 20% and 5% for polyurethane and silicon R-2180, respectively.

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  • Copyright © 2015 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
Date Created
  • 2015


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