Surface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging

The surface stoichiometry of the degraded surface of a commercial Al–Si casting was investigated. The die-cast component was previously stored in a sealed plastic envelope. After that, surface stains in the form of white layers were observed. X-ray photoelectron spectroscopy (XPS) was used to study...

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Autores principales:	Darja Steiner Petrovič, Djordje Mandrino
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Al–Si die casting technical cleaning detergent humidity 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/3099d4ea6fef40d29220d3656ecef213
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spelling	oai:doaj.org-article:3099d4ea6fef40d29220d3656ecef2132021-11-11T18:02:04ZSurface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging10.3390/ma142164581996-1944https://doaj.org/article/3099d4ea6fef40d29220d3656ecef2132021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6458https://doaj.org/toc/1996-1944The surface stoichiometry of the degraded surface of a commercial Al–Si casting was investigated. The die-cast component was previously stored in a sealed plastic envelope. After that, surface stains in the form of white layers were observed. X-ray photoelectron spectroscopy (XPS) was used to study these layers. For comparison, a seemingly unaffected area as well as a freshly cut surface of the casting were also analysed. In order to additionally assess the surface condition, surface roughnesses were measured. Based on the binding energies (BEs) of the Al and O in the XPS spectra, and the stoichiometric results, it was concluded that the surface layers of the degraded and undegraded samples consist mostly of aluminium oxide and aluminium hydroxide. Furthermore, sodium phosphate from the leftover detergent and silicon oxide were detected in both analysed areas. Analyses of the Al KLL Auger transition were used to corroborate this. The relative shares of Al oxide vs. hydroxide based on the elemental concentrations were determined. The chemical compositions and chemical states of the elements in the top layers were thus obtained. The combination of surface-sensitive analytical techniques was found to be a suitable tool for the ex-post identification of the source of defects.Darja Steiner PetrovičDjordje MandrinoMDPI AGarticleAl–Sidie castingtechnical cleaningdetergenthumiditycorrosionTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6458, p 6458 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Al–Si die casting technical cleaning detergent humidity 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	Al–Si die casting technical cleaning detergent humidity 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 Darja Steiner Petrovič Djordje Mandrino Surface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging
description	The surface stoichiometry of the degraded surface of a commercial Al–Si casting was investigated. The die-cast component was previously stored in a sealed plastic envelope. After that, surface stains in the form of white layers were observed. X-ray photoelectron spectroscopy (XPS) was used to study these layers. For comparison, a seemingly unaffected area as well as a freshly cut surface of the casting were also analysed. In order to additionally assess the surface condition, surface roughnesses were measured. Based on the binding energies (BEs) of the Al and O in the XPS spectra, and the stoichiometric results, it was concluded that the surface layers of the degraded and undegraded samples consist mostly of aluminium oxide and aluminium hydroxide. Furthermore, sodium phosphate from the leftover detergent and silicon oxide were detected in both analysed areas. Analyses of the Al KLL Auger transition were used to corroborate this. The relative shares of Al oxide vs. hydroxide based on the elemental concentrations were determined. The chemical compositions and chemical states of the elements in the top layers were thus obtained. The combination of surface-sensitive analytical techniques was found to be a suitable tool for the ex-post identification of the source of defects.
format	article
author	Darja Steiner Petrovič Djordje Mandrino
author_facet	Darja Steiner Petrovič Djordje Mandrino
author_sort	Darja Steiner Petrovič
title	Surface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging
title_short	Surface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging
title_full	Surface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging
title_fullStr	Surface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging
title_full_unstemmed	Surface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging
title_sort	surface stoichiometry and roughness of a degraded a380 alloy after casting, technical cleaning and packaging
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3099d4ea6fef40d29220d3656ecef213
work_keys_str_mv	AT darjasteinerpetrovic surfacestoichiometryandroughnessofadegradeda380alloyaftercastingtechnicalcleaningandpackaging AT djordjemandrino surfacestoichiometryandroughnessofadegradeda380alloyaftercastingtechnicalcleaningandpackaging
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Surface Stoichiometry and Roughness of a Degraded A380 Alloy after Casting, Technical Cleaning and Packaging

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