Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum Alloy

Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum Alloy

A dense alumina ceramic coating was formed on UNS A97075 Al alloy by plasma electrolytic oxidation (PEO). An efficient and environmentally friendly silane layer was prepared to seal the PEO coating. The scanning electron microscopy (SEM) results showed that the PEO coating was completely sealed by t...

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Bibliographic Details
Main Authors: Diping Zeng, Zhiyi Liu, Song Bai, Juangang Zhao
Format: Article
Language:English
Published: MDPI AG 2021-05-01
Series:Coatings
Subjects:
corrosion resistance
electrochemical impedance spectroscopy (EIS)
electrochemical corrosion evolution
PEO/silane composite coating
Online Access:https://www.mdpi.com/2079-6412/11/5/549
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spelling doaj-55f18457ec02419b91a4aa6f9b2516062021-05-31T23:20:26ZengMDPI AGCoatings2079-64122021-05-011154954910.3390/coatings11050549Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum AlloyDiping Zeng0Zhiyi Liu1Song Bai2Juangang Zhao3Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaA dense alumina ceramic coating was formed on UNS A97075 Al alloy by plasma electrolytic oxidation (PEO). An efficient and environmentally friendly silane layer was prepared to seal the PEO coating. The scanning electron microscopy (SEM) results showed that the PEO coating was completely sealed by the silane layer. The electrochemical corrosion evolution of the silane sealed PEO composite coating was studied by electrochemical impedance spectroscopy (EIS). Based on the EIS data, the corrosion evolution of the silane sealed composite coating could be divided to three stages during 576 h of immersion test, and the silane coating acted as a good physical barrier in the immersion test, effectively delayed the corrosion process and improved the corrosion resistance.https://www.mdpi.com/2079-6412/11/5/549corrosion resistanceelectrochemical impedance spectroscopy (EIS)electrochemical corrosion evolutionPEO/silane composite coating
collection DOAJ
language English
format Article
sources DOAJ
author Diping Zeng
Zhiyi Liu
Song Bai
Juangang Zhao
spellingShingle Diping Zeng
Zhiyi Liu
Song Bai
Juangang Zhao
Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum Alloy
Coatings
corrosion resistance
electrochemical impedance spectroscopy (EIS)
electrochemical corrosion evolution
PEO/silane composite coating
author_facet Diping Zeng
Zhiyi Liu
Song Bai
Juangang Zhao
author_sort Diping Zeng
title Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum Alloy
title_short Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum Alloy
title_full Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum Alloy
title_fullStr Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum Alloy
title_full_unstemmed Preparation and Characterization of a Silane Sealed PEO Coating on Aluminum Alloy
title_sort preparation and characterization of a silane sealed peo coating on aluminum alloy
publisher MDPI AG
series Coatings
issn 2079-6412
publishDate 2021-05-01
description A dense alumina ceramic coating was formed on UNS A97075 Al alloy by plasma electrolytic oxidation (PEO). An efficient and environmentally friendly silane layer was prepared to seal the PEO coating. The scanning electron microscopy (SEM) results showed that the PEO coating was completely sealed by the silane layer. The electrochemical corrosion evolution of the silane sealed PEO composite coating was studied by electrochemical impedance spectroscopy (EIS). Based on the EIS data, the corrosion evolution of the silane sealed composite coating could be divided to three stages during 576 h of immersion test, and the silane coating acted as a good physical barrier in the immersion test, effectively delayed the corrosion process and improved the corrosion resistance.
topic corrosion resistance
electrochemical impedance spectroscopy (EIS)
electrochemical corrosion evolution
PEO/silane composite coating
url https://www.mdpi.com/2079-6412/11/5/549
work_keys_str_mv AT dipingzeng preparationandcharacterizationofasilanesealedpeocoatingonaluminumalloy
AT zhiyiliu preparationandcharacterizationofasilanesealedpeocoatingonaluminumalloy
AT songbai preparationandcharacterizationofasilanesealedpeocoatingonaluminumalloy
AT juangangzhao preparationandcharacterizationofasilanesealedpeocoatingonaluminumalloy
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