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PREPARATION AND CORROSION CHARACTERIZATION OF ORGANIC-INORGANIC HYBRID COATIGNS

Sheng Ye-qing

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Abstract

Organic-inorganic hybrid coatings are prepared by sol-gel process,using methyltriethoxy silane(MTEOS) and tetraethoxy silane(TEOS) precursors.The as-prepared hybrid coatings were dense,uniform and defect-free.The corrosion resistance of the hybrid coatings applied on aluminum alloys is particular tested.The coatings show excellent corrosion resistant properties.So the new hybrid chromate-free coating systems can provide long-term and environmental friendly corrosion protection,in the contrast,the traditional chromate-based conversion coatings are toxic and suspicious of carcinogenic danger.

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What this paper is about

Organic-inorganic hybrid coatings are prepared by sol-gel process,using methyltriethoxy silane(MTEOS) and tetraethoxy silane(TEOS) precursors.The as-prepared hybrid coatings were dense,uniform and defect-free.The corrosion resistance of the hybrid coatings applied on aluminum alloys is particular tested.The coatings show excellent corrosion resistant properties.So the new hybrid chromate-free coating systems can provide long-term and environmental friendly corrosion protection,in the contrast,the traditional chromate-based conversion coatings are toxic and suspicious of carcinogenic danger.

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Available abstract

Organic-inorganic hybrid coatings are prepared by sol-gel process,using methyltriethoxy silane(MTEOS) and tetraethoxy silane(TEOS) precursors.The as-prepared hybrid coatings were dense,uniform and defect-free.The corrosion resistance of the hybrid coatings applied on aluminum alloys is particular tested.The coatings show excellent corrosion resistant properties.So the new hybrid chromate-free coating systems can provide long-term and environmental friendly corrosion protection,in the contrast,the traditional chromate-based conversion coatings are toxic and suspicious of carcinogenic danger.

Key concepts: Chromate conversion coating, Corrosion, Materials science, Silane, Coating, Hybrid material, Conversion coating, Aluminium

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