Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy

Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy

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 b...

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Bibliographic Details
Main Authors: Diping Zeng, Zhiyi Liu, Lihua Zou, Haijiang Wu
Format: Article
Language:English
Published: MDPI AG 2021-07-01
Series:Coatings
Subjects:
bis-silane prepolymer
silane-epoxy coatings
aluminum alloy
EIS
Online Access:https://www.mdpi.com/2079-6412/11/7/842
id doaj-a2759a3ff89a4413a477d0bfb92bb2ea
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spelling doaj-a2759a3ff89a4413a477d0bfb92bb2ea2021-07-23T13:36:14ZengMDPI AGCoatings2079-64122021-07-011184284210.3390/coatings11070842Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum AlloyDiping Zeng0Zhiyi Liu1Lihua Zou2Haijiang Wu3Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaDepartment of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, ChinaDepartment of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, ChinaIn 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 (C<sub>c</sub>), higher charge transfer resistances (R<sub>dl</sub>), and lower double layer capacitance (C<sub>dl</sub>) 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.https://www.mdpi.com/2079-6412/11/7/842bis-silane prepolymersilane-epoxy coatingsaluminum alloyEIS
collection DOAJ
language English
format Article
sources DOAJ
author Diping Zeng
Zhiyi Liu
Lihua Zou
Haijiang Wu
spellingShingle Diping Zeng
Zhiyi Liu
Lihua Zou
Haijiang Wu
Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy
Coatings
bis-silane prepolymer
silane-epoxy coatings
aluminum alloy
EIS
author_facet Diping Zeng
Zhiyi Liu
Lihua Zou
Haijiang Wu
author_sort Diping Zeng
title Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy
title_short Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy
title_full Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy
title_fullStr Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy
title_full_unstemmed Corrosion Resistance of Epoxy Coatings Modified by Bis-Silane Prepolymer on Aluminum Alloy
title_sort corrosion resistance of epoxy coatings modified by bis-silane prepolymer on aluminum alloy
publisher MDPI AG
series Coatings
issn 2079-6412
publishDate 2021-07-01
description 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 (C<sub>c</sub>), higher charge transfer resistances (R<sub>dl</sub>), and lower double layer capacitance (C<sub>dl</sub>) 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.
topic bis-silane prepolymer
silane-epoxy coatings
aluminum alloy
EIS
url https://www.mdpi.com/2079-6412/11/7/842
work_keys_str_mv AT dipingzeng corrosionresistanceofepoxycoatingsmodifiedbybissilaneprepolymeronaluminumalloy
AT zhiyiliu corrosionresistanceofepoxycoatingsmodifiedbybissilaneprepolymeronaluminumalloy
AT lihuazou corrosionresistanceofepoxycoatingsmodifiedbybissilaneprepolymeronaluminumalloy
AT haijiangwu corrosionresistanceofepoxycoatingsmodifiedbybissilaneprepolymeronaluminumalloy
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