Biodeterioration of Incralac used for the protection of bronze monuments |
| |
| Authors: | Christopher J McNamara Margaret Breuker Marie Helms Thomas D Perry Ralph Mitchell |
| |
| Institution: | Laboratory of Microbial Ecology, Division of Engineering and Applied Sciences, Harvard University, 40 Oxford St, Cambridge, MA 02138, USA |
| |
| Abstract: | Outdoor bronze sculptures are highly susceptible to corrosion in many environments and organic coatings are widely used for their protection. The purpose of this study was to determine the susceptibility of the commonly used coating Incralac to biodeterioration by microorganisms. A yeast was isolated from a bronze statue treated with Incralac and its ability to degrade Incralac was determined using growth curves, scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The organism grew slowly on Incralac in liquid culture, but SEM images demonstrated its ability to adhere to Incralac coated metal. Additionally, the yeast caused a rapid drop in the low frequency impedance of Incralac coated metal that was not observed under sterile conditions, indicating that the organism accelerated deterioration of the coating. The potential for microbial growth to accelerate deterioration of Incralac should be considered when developing a maintenance strategy for the protection of outdoor metal monuments. |
| |
| Keywords: | Microorganisms EIS Coatings Growth curves SEM |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
