Abstract
Electrochemical impedance spectroscopy (EIS) is a technique that quantitatively measures the amount of corrosion protection provided by a coating to a metal substrate. This article illustrates the theory of EIS along with its potential for application in the evaluation of protective coatings for outdoor bronze sculpture and ornamentation. Three coating systems were evaluated on a monumental cast bronze: a microcrystalline wax; the methyl methacrylate copolymer sold under the trade name Incralac; and an acrylic/acrylic urethane topcoat. Each coating system was aged using accelerated weathering and evaluated via EIS. This information was then used to calculate the impedance modulus of the samples, which is displayed in Bode plots and interpreted in terms of coating performance.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
