Study on Surface Modification of Aluminum Alloys by Silicate-Based Hybrid Coating

Jia Yu Wang; Cheng Li

doi:10.4028/www.scientific.net/AMR.652-654.1792

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Dependence of the Coating Carbon Layer Configuration of Cordierite Monolith on Coating Reaction Conditions in Methane Decomposition
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Microstructures and Wear Resistance of Si-Al-Y Co-Deposition Coatings on γ-TiAl Alloy
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Study on Surface Modification of Aluminum Alloys by Silicate-Based Hybrid Coating
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The Investigation of Abrasive Jet Polishing on the Linear Micro-Channels Surface of SKD61 Mold Steel
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The Property Comparison of Coating Prepared by Oxygen-Acetylene Spray Welding Technology and High-Frequency Induction Remelting Technology
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Comparative Study of the Cyclic Oxidation Resistance of NiCrAlY and NiCoCrAlY Coatings
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The High Temperature Oxidation Resistance and Anti-Oxidation Mechanism of Plasma-Sprayed NiCrAlY Coatings on Stainless Stell
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Study on Surface Modification of Aluminum Alloys...

Study on Surface Modification of Aluminum Alloys by Silicate-Based Hybrid Coating

Abstract:

Silicate-based hybrid coatings were deposited on aluminum alloy substrates following the methodology of sol-gel procedure and are applying to survey the corrosion protective behavior. The results show that the optimal intact and uniform film can be obtained by preparing with Si:Al mole ratio 48:1 and tempering at 140°C. It was noted that this modified hybrid coating reduced the corrosion current density from 1.532×10-4A/cm2 (bare substrate) to 2.782×10-8 A/cm2 in 3.5 wt. % NaCl solution. The coating represents an excellent stability, especially at higher temperature, therefore could offer a significant protection to 2024 aluminum alloy substrates.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

1792-1798

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.1792

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Online since:

January 2013

Authors:

Jia Yu Wang, Cheng Li

Keywords:

Aluminium Alloy, Coating, Corrosion Protection, Sol-Gel Process

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