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Surface science studies of the effect of Mn2+ on zinc phosphating of 2024-T3 Al alloy

TitleSurface science studies of the effect of Mn2+ on zinc phosphating of 2024-T3 Al alloy
Publication TypeBook Chapter
Year of Publication2006
AuthorsAkhtar, AS, Susac, D, Wong, KC, Wong, PC, Mitchell, KAR
EditorPoole, WJ, Wells, MA, Lloyd, DJ
Book TitleAluminium Alloys 2006, Pts 1 and 2 - Research through Innovation and Technology
Series TitleMaterials Science Forum
Volume519-521
Pagination753-758
PublisherTrans Tech Publications Ltd
CityZurich-Uetikon
ISBN Number0255-54760-87849-408-1
Keywordsaluminum alloy, ALUMINUM-ALLOY, Auger, COATINGS, CONVERSION COATINGS, electron spectroscopy, Mn2+ additive, photoelectron spectroscopy, scanning electron microscopy, STEEL, zinc phosphate
Abstract

The present work is part of a broader investigation of the effects of additives in zinc phosphate (ZPO) coating solutions that are designed for specific applications to Al and its alloys. ZPO conversion coatings improve the corrosion resistance of the Al substrate and increase the adhesion of paint. Coatings formed on 2024-T3 aluminum alloy, after dipping in ZPO coating baths containing Mn2+, have been studied by X-ray photoelectron spectroscopy (XPS), SEM, and scanning Auger microscopy (SAM). Variations are observed in coating morphology and composition as the amount of Mn2+ in the coating solution increases through the 0 to 2500 ppm range. Adhesion tests give information on the relative strength of the coating-substrate interaction at different microstructural areas.

URL<Go to ISI>://000240309000118