Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy
| Autor: | Lihua Zou, Haijiang Wu, Diping Zeng, Zhiyi Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
bis-silane prepolymer Alloy Double-layer capacitance 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Corrosion chemistry.chemical_compound Coating Materials Chemistry silane-epoxy coatings Composite material Prepolymer EIS Silanes Surfaces and Interfaces Epoxy Engineering (General). Civil engineering (General) 021001 nanoscience & nanotechnology Silane 0104 chemical sciences Surfaces Coatings and Films chemistry visual_art engineering visual_art.visual_art_medium TA1-2040 aluminum alloy 0210 nano-technology |
| Zdroj: | Coatings Volume 11 Issue 7 Coatings, Vol 11, Iss 842, p 842 (2021) |
| ISSN: | 2079-6412 |
| Popis: | In this communication, a bis-silane prepolymer was used to modify epoxy resin, aiming to enhance the corrosion resistance of epoxy coatings on aluminum alloy substrates. The bis-silane prepolymer was prepared by tetraethoxysilane (TEOS) and γ-glycidoxypropyl trimethoxysilane (GPTMS). The corrosion behavior of silane-epoxy coatings was studied. Compared with silane monomer-modified epoxy coatings, bis-silane-modified epoxy coatings have lower coating capacitance (Cc), higher charge transfer resistances (Rdl), and lower double layer capacitance (Cdl) during long-time immersion. It indicates that bis-silane-modified epoxy coating has stronger waterproof permeability and substrate corrosion protection ability. In addition, due to the leaching of the silane component and cross-linking reaction between different silanes during the immersion process, the bis-silane-modified epoxy coatings exhibit much stronger “self-healing” ability. |
| Databáze: | OpenAIRE |
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