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00285 ICI, INTELLIGENT CORROSION INDICATOR, AND ITS USE FOR THE EARLY DETECTION OF CORROSION ON ALUMINUM ALLOY SURFACES BY FLUORESCENCE

Picture for 00285 ICI, INTELLIGENT CORROSION INDICATOR,
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Product Number: 51300-00285-SG
ISBN: 00285 2000 CP
Author: Michael G. Durrett, Richard E. Johnson, Vinod S. Agarwala
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Several fluorescent materials have been used under epoxy coatings on 7075 aluminum alloy surfaces. These fluorescent materials either fluoresce upon oxidation and are thus corrosivity indicators or they fluoresce with the products of corrosion and are true corrosion indicators. Recent work has involved using a pigmented epoxy paint, such as that used on aircraft, to see if fluorescence is still visible. Although the intensity is reduced, there is still visible fluorescence. This paper reports the results of the most promising fluorescent markers in each of the two types mentioned above. Photographic data are presented with changes of fluorescent activity with time. These two types of indicators have the potential to detect corrosion or corrosive conditions under paint coatings and could greatly reduce the costs of corrosion maintenance as well as enhancing safety factors in aircraft. Keywords: aluminum alloys, coatings, corrosion detection, fluorescent materials
Several fluorescent materials have been used under epoxy coatings on 7075 aluminum alloy surfaces. These fluorescent materials either fluoresce upon oxidation and are thus corrosivity indicators or they fluoresce with the products of corrosion and are true corrosion indicators. Recent work has involved using a pigmented epoxy paint, such as that used on aircraft, to see if fluorescence is still visible. Although the intensity is reduced, there is still visible fluorescence. This paper reports the results of the most promising fluorescent markers in each of the two types mentioned above. Photographic data are presented with changes of fluorescent activity with time. These two types of indicators have the potential to detect corrosion or corrosive conditions under paint coatings and could greatly reduce the costs of corrosion maintenance as well as enhancing safety factors in aircraft. Keywords: aluminum alloys, coatings, corrosion detection, fluorescent materials
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