The effect of aluminium alloy secondary phases on aniline-based silane protection capacity

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• 作者：Monica Trueba ; Stefano P. Trasatti ; Daniel O. Flamini
• 关键词：A. Aluminium alloy ; A. Polymer coatings ; C. Corrosion ; C. Inhibition
• 刊名：Corrosion Science
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：63
• 期：Complete
• 页码：59-70
• 全文大小：1868 K

文摘

Commercial wrought Al alloys with high content of intermetallic phases, namely, AA5083-H111, AA2024-T3 and AA7075-T6, were treated with N-(3-trimethoxysilylpropyl) aniline (AnSi) by a simple procedure. Characterization studies and corrosion experiments indicate that the hybrid film protection capacity is related in a complex way to the macromolecular network structure linked to the Al substrate composition. Nevertheless, barrier protection enhanced by a buffer effect and galvanic coupling, as aided by aniline units within the hybrid film, is indicated mostly. Results overall demonstrate synergistic effect against Al alloy corrosion by combining at a molecular level monomers of conducting polymers and silane functionalities.