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01550 ORGANIC-INORGANIC HYBRID COATINGS AS CORROSION INHIBITING SURFACE TREATMENTS FOR ALUMINUM ALLOYS

Picture for 01550 ORGANIC-INORGANIC HYBRID COATINGS
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Product Number: 51300-01550-SG
ISBN: 01550 2001 CP
Author: T. L. Metroke, E. Stesikova, O. Kachurina, and E. T. Knobbe
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Organic-inorganic hybrid films, ormosils, have been investigated as corrosion resistant coatings for 2024-T3 aluminum alloys. These films were found to provide good corrosion protection, good compatibility with organic primers, and excellent filiform corrosion resistance as evaluated using accelerated 168 hour salt spray, 2000 hour salt spray, and filiform corrosion tests. Composite coatings composed of AA surface pretreatment with either trivalent chromium or alodine conversion coatings followed by the deposition of an ormosil film were prepared. Such composite coatings resisted corrosion in a manner superior to bare aluminum or a single layer ormosil coating. The impact of the Cr(III)-based conversion coating on corrosion resistance of the composite fihns is comparable to that of the Cr(VI)-based alodine surface pretreatment. This implies that the environmentally compliant and non-toxic trivalent chromium conversion coating is a potential alternative for the hazardous and carcinogenic alodine treatment. Keywords: sol-gel, corrosion resistance, salt spray, filiform, conversion coatings, ormosil
Organic-inorganic hybrid films, ormosils, have been investigated as corrosion resistant coatings for 2024-T3 aluminum alloys. These films were found to provide good corrosion protection, good compatibility with organic primers, and excellent filiform corrosion resistance as evaluated using accelerated 168 hour salt spray, 2000 hour salt spray, and filiform corrosion tests. Composite coatings composed of AA surface pretreatment with either trivalent chromium or alodine conversion coatings followed by the deposition of an ormosil film were prepared. Such composite coatings resisted corrosion in a manner superior to bare aluminum or a single layer ormosil coating. The impact of the Cr(III)-based conversion coating on corrosion resistance of the composite fihns is comparable to that of the Cr(VI)-based alodine surface pretreatment. This implies that the environmentally compliant and non-toxic trivalent chromium conversion coating is a potential alternative for the hazardous and carcinogenic alodine treatment. Keywords: sol-gel, corrosion resistance, salt spray, filiform, conversion coatings, ormosil
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Picture for 00287 IMPACT OF TRIVALENT CHROMIUM CONVERSION
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00287 IMPACT OF TRIVALENT CHROMIUM CONVERSION LAYERS AND HYBRID SILICATE COATINGS ON CORROSION RESISTANCE OF ALUMINUM ALLOYS

Product Number: 51300-00287-SG
ISBN: 00287 2000 CP
Author: Elvira Stesikova, Tammy L. Metroke, Perry L. Reed, Vinod S. Agarwala and Edward T. Knobbe
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01551 Effects of Corrosion Control Coatings on the Pitting Behavior of Aluminum Alloy 7075-T6

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ISBN: 01551 2001 CP
Author: Joan Deffeyes, Kip Hunter, Dick Lederich, Rigo Perez, and KK Sankaran
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99491 A CHROME-FREE CONVERSION COATING AND SEALANT FOR ALUMINUM AND ITS ALLOYS

Product Number: 51300-99491-SG
ISBN: 99491 1999 CP
Author: John W. Bibber, Ph.D
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