Corrosion Behavior of the CoNiCrAlY-Al2O3 Composite Coating Based on Core-Shell Structured Powder Design

The oxidation of the metal powder during the thermal spraying process usually leads to significant deterioration of the microstructure and performance of the coating. In order to isolate the metal powder from oxygen during the spraying process, the CoNiCrAlY-Al2O3&l...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Wenmin Guo, Honglin Zhang, Shan Zhao, Zhibing Ding, Bin Liu, Wenjuan Li, Huanhuan Xu, Huiyuan Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	core-shell structured powder high velocity oxy-fuel spray microstructure corrosion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/2fb358f564b24564b85d96136412c430
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:2fb358f564b24564b85d96136412c430
record_format	dspace
spelling	oai:doaj.org-article:2fb358f564b24564b85d96136412c4302021-11-25T18:16:20ZCorrosion Behavior of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> Composite Coating Based on Core-Shell Structured Powder Design10.3390/ma142270931996-1944https://doaj.org/article/2fb358f564b24564b85d96136412c4302021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/7093https://doaj.org/toc/1996-1944The oxidation of the metal powder during the thermal spraying process usually leads to significant deterioration of the microstructure and performance of the coating. In order to isolate the metal powder from oxygen during the spraying process, the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> core-shell structured powder with Al<sub>2</sub>O<sub>3</sub> as the shell was designed in this study. The influence of the core-shell structured powder on the microstructure and corrosion resistance of the HVOF coating has been studied in detail. The results show that the temperature field of the molten CoNiCrAlY powder during the spraying process is significantly changed by the Al<sub>2</sub>O<sub>3</sub> shell. The poor deformability of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> droplets leads to an increase in the porosity and unmelted particles of the coating. In addition, the significant difference is that the coating also maintains a high content of β-NiAl phase. The lower oxide content in the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> coating indicates that the core-shell structured powder significantly inhibits the oxidation of the CoNiCrAlY core powder during the spraying process. The CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> coating exhibits high corrosion potential, passive film resistance, charge transfer resistance, and low corrosion current density in 3.5 wt.% NaCl solution, indicating that the coating has excellent corrosion resistance.Wenmin GuoHonglin ZhangShan ZhaoZhibing DingBin LiuWenjuan LiHuanhuan XuHuiyuan LiuMDPI AGarticlecore-shell structured powderhigh velocity oxy-fuel spraymicrostructurecorrosionTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 7093, p 7093 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	core-shell structured powder high velocity oxy-fuel spray microstructure corrosion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	core-shell structured powder high velocity oxy-fuel spray microstructure corrosion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Wenmin Guo Honglin Zhang Shan Zhao Zhibing Ding Bin Liu Wenjuan Li Huanhuan Xu Huiyuan Liu Corrosion Behavior of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> Composite Coating Based on Core-Shell Structured Powder Design
description	The oxidation of the metal powder during the thermal spraying process usually leads to significant deterioration of the microstructure and performance of the coating. In order to isolate the metal powder from oxygen during the spraying process, the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> core-shell structured powder with Al<sub>2</sub>O<sub>3</sub> as the shell was designed in this study. The influence of the core-shell structured powder on the microstructure and corrosion resistance of the HVOF coating has been studied in detail. The results show that the temperature field of the molten CoNiCrAlY powder during the spraying process is significantly changed by the Al<sub>2</sub>O<sub>3</sub> shell. The poor deformability of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> droplets leads to an increase in the porosity and unmelted particles of the coating. In addition, the significant difference is that the coating also maintains a high content of β-NiAl phase. The lower oxide content in the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> coating indicates that the core-shell structured powder significantly inhibits the oxidation of the CoNiCrAlY core powder during the spraying process. The CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> coating exhibits high corrosion potential, passive film resistance, charge transfer resistance, and low corrosion current density in 3.5 wt.% NaCl solution, indicating that the coating has excellent corrosion resistance.
format	article
author	Wenmin Guo Honglin Zhang Shan Zhao Zhibing Ding Bin Liu Wenjuan Li Huanhuan Xu Huiyuan Liu
author_facet	Wenmin Guo Honglin Zhang Shan Zhao Zhibing Ding Bin Liu Wenjuan Li Huanhuan Xu Huiyuan Liu
author_sort	Wenmin Guo
title	Corrosion Behavior of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> Composite Coating Based on Core-Shell Structured Powder Design
title_short	Corrosion Behavior of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> Composite Coating Based on Core-Shell Structured Powder Design
title_full	Corrosion Behavior of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> Composite Coating Based on Core-Shell Structured Powder Design
title_fullStr	Corrosion Behavior of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> Composite Coating Based on Core-Shell Structured Powder Design
title_full_unstemmed	Corrosion Behavior of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> Composite Coating Based on Core-Shell Structured Powder Design
title_sort	corrosion behavior of the conicraly-al<sub>2</sub>o<sub>3</sub> composite coating based on core-shell structured powder design
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2fb358f564b24564b85d96136412c430
work_keys_str_mv	AT wenminguo corrosionbehavioroftheconicralyalsub2subosub3subcompositecoatingbasedoncoreshellstructuredpowderdesign AT honglinzhang corrosionbehavioroftheconicralyalsub2subosub3subcompositecoatingbasedoncoreshellstructuredpowderdesign AT shanzhao corrosionbehavioroftheconicralyalsub2subosub3subcompositecoatingbasedoncoreshellstructuredpowderdesign AT zhibingding corrosionbehavioroftheconicralyalsub2subosub3subcompositecoatingbasedoncoreshellstructuredpowderdesign AT binliu corrosionbehavioroftheconicralyalsub2subosub3subcompositecoatingbasedoncoreshellstructuredpowderdesign AT wenjuanli corrosionbehavioroftheconicralyalsub2subosub3subcompositecoatingbasedoncoreshellstructuredpowderdesign AT huanhuanxu corrosionbehavioroftheconicralyalsub2subosub3subcompositecoatingbasedoncoreshellstructuredpowderdesign AT huiyuanliu corrosionbehavioroftheconicralyalsub2subosub3subcompositecoatingbasedoncoreshellstructuredpowderdesign
_version_	1718411371442339840

Corrosion Behavior of the CoNiCrAlY-Al<sub>2</sub>O<sub>3</sub> Composite Coating Based on Core-Shell Structured Powder Design

Ejemplares similares