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Status
Electronic Resource
Publication
April 1980
Language
Library's review
ABSTRACT:
Corroded mirrors from a heliostat exposed at Livermore, CA for eight months have been characterized by a variety of techniques including optical and electron microscopy, reflectance and transmission spectroscopy, and surface-enhanced Raman spectroscopy. The results indicate that the
Corroded mirrors from a heliostat exposed at Livermore, CA for eight months have been characterized by a variety of techniques including optical and electron microscopy, reflectance and transmission spectroscopy, and surface-enhanced Raman spectroscopy. The results indicate that the
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chemical methods used in previous studies to remove the paint from the back surface of corroded mirrors significantly altered the morphology of the corroded film. A mechanical stripping technique has been developed which eliminates these problems. Use of this new technique, combined with studies of the reflective surface as viewed through the glass, have revealed that the corrosion spots are areas of agglomerated silver which are only loosely bonded to the glass superstrate. These agglomerates can be removed by wiping with paper tissue or by placing the sample in water or glacial acetic acid for a few seconds. These observations have led to the suggestion of a new model for the corrosion process. Show Less