Abstract
The degradation of a paint coating applied to the backs of mirrors was studied using infrared spectroscopy during a standard test. This analytical tool showed that the protective coating is subject to alterations within a thickness ranging from the surface to at least 7.65μm. The effects of the normalized test lead to the dissolution of the calcium carbonate extenders and to chemical modifications of the paint binder. These phenomena are responsible for the progressive erosion of the paint coating surface and for a weakening of its protective properties. The paint film's degradation lead to random corrosion of the metallic layers that make up the mirror backs. ©
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