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Pre-treatments applied to oxidized aluminum surfaces to modify the interfacial bonding with bis-1,2-(triethoxysilyl)ethane (BTSE) - Part II. Anodized 7075-T6 Al alloy

TitlePre-treatments applied to oxidized aluminum surfaces to modify the interfacial bonding with bis-1,2-(triethoxysilyl)ethane (BTSE) - Part II. Anodized 7075-T6 Al alloy
Publication TypeJournal Article
Year of Publication2005
AuthorsKim, J, Teo, M, Wong, PC, Wong, KC, Mitchell, KAR
JournalApplied Surface Science
Volume252
Pagination1305-1312
Date PublishedDec
Type of ArticleArticle
ISBN Number0169-4332
Keywords2024-T3, AGENTS, aluminum, corrosion, COUPLING, ESCA, HYDROXIDES, silane adsorption, SIMS, SPECTROSCOPY, surface pre-treatment, THIN-FILMS, X-ray photoelectron, XPS, XPS INVESTIGATIONS, ZIRCONIUM-OXIDE
Abstract

The methods of X-ray pbotoelectron spectroscopy (XPS), secondary-ion mass spectrometry (SIMS), and scanning electron microscopy (SEM) have been used to investigate aspects of the bonding of bis-1,2-(triethoxysilyl)ethane (BTSE) onto anodized samples of 7075-T6 aluminum alloy that have been subjected to the various pre-treatments considered in Part I. The oxide layer thins when this sample is subjected to a Forest Products Laboratory (FPL) treatment; topographical changes are detected by SEM after only 5 min, and the "scallop structures" increase in size for longer times of the FPL treatment. These 7075-Al surfaces adsorb more BTSE than the high-purity Al samples considered in Part I, although the interfacial bonding indicated by the [AlOSi](+)/[Al2O](+) SIMS ratios measured for the former samples are constant for different times of FPL treatment, unlike the situation for high-purity Al. Heating anodized 7075-Al samples, either before or after FPL treatment, has no significant effect on the subsequent BTSE adsorption, but a H-2 plasma treatment can enhance the interfacial Al-O-Si bonding with a decrease in the total BTSE polymerization. (c) 2005 Elsevier B.V. All rights reserved.

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