A Dense Cr2O3/Al2O3 Composite Ceramic Coating Prepared by Electrodeposition and Sealing with Al2O3

A dense Cr2O3/Al2O3 composite coating was fabricated on 321L stainless steel by electrodepositing an Al2O3 layer on a Cr2O3 coating. The composition, structure, and properties of the obtained ceramic coating were investigated. The results showed that Al2O3 fully infiltrated the Cr2O3 coating and sig...

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Published inCoatings (Basel) Vol. 9; no. 1; p. 14
Main Authors Di, Jiao, Liu, Wei, Xue, Lihong, Zhou, Qilai, Yan, Youwei
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.01.2019
Subjects
Aluminum oxide
Bonding strength
Ceramic coatings
Ceramic glazes
Ceramics
Chromium oxides
Coated electrodes
Corrosion prevention
Corrosion resistance
Deuterium
Electrodes
Epoxy resins
Heat
Heat treatment
Microhardness
Morphology
Protective coatings
Stainless steels
Japan
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Summary:A dense Cr2O3/Al2O3 composite coating was fabricated on 321L stainless steel by electrodepositing an Al2O3 layer on a Cr2O3 coating. The composition, structure, and properties of the obtained ceramic coating were investigated. The results showed that Al2O3 fully infiltrated the Cr2O3 coating and significantly improved the compactness of the ceramic coating by filling in the pores and cracks between the Cr2O3 grains. The composite ceramic coating was heat-treated at 750 °C and exhibited a high microhardness of 219.4 HV500g, a bonding strength of 46.5 MPa, and excellent anti-corrosion and deuterium permeation suppression properties.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 14
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings9010014