The influence of alkali-degreasing on the chemical composition of hot-dip galvanized steel surfaces
Document identifier: oai:dalea.du.se:2687
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10.1002/sia.2364Keyword: Engineering and Technology,
Materials Engineering,
Teknik och teknologier,
Materialteknik,
AES; corrosion; galvanized steel; ToF-SIMS; XPSPublication year: 2006Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: The influence of dipping temperature and time on the surface chemistry of hot-dipped galvanized steel sheets during the alkaline degreasing process is investigated. The surface chemistry was monitored with scanning Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectroscopy (ToF-SIMS). The results show high Al concentrations on the untreated surfaces, which are significantly reduced during alkaline degreasing. The same conclusions could be drawn for the carbon compounds that accumulate on the surface during storage. The measurements reveal a gradual reduction in surface Al as the alkali solution temperature and/or degreasing time are increased. When degreasing was conducted at 70 °C for 30 s the surface was practically free from Al, which was present only in small islands. Furthermore, the experiments showed that the thickness of the oxide film covering the surfaces before and after alkaline degreasing is approximately 20 Å. The main constituents of the film varied from ZnAl hydroxide/oxide to Zn hydroxide/oxide, before and after degreasing, respectively.
Authors
Robert Berger
Högskolan Dalarna; Materialvetenskap
Other publications
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Ulf Bexell
Högskolan Dalarna; Materialvetenskap
Other publications
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N. Stavlid
Other publications
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Mikael Grehk
Högskolan Dalarna; Materialvetenskap
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>>
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header:
identifier: oai:dalea.du.se:2687
datestamp: 2021-04-15T12:55:12Z
setSpec: SwePub-du
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recordCreationDate: 2007-04-04
identifier:
http://urn.kb.se/resolve?urn=urn:nbn:se:du-2687
10.1002/sia.2364
titleInfo:
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lang: eng
title: The influence of alkali-degreasing on the chemical composition of hot-dip galvanized steel surfaces
abstract: The influence of dipping temperature and time on the surface chemistry of hot-dipped galvanized steel sheets during the alkaline degreasing process is investigated. The surface chemistry was monitored with scanning Auger electron spectroscopy (AES) X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectroscopy (ToF-SIMS). The results show high Al concentrations on the untreated surfaces which are significantly reduced during alkaline degreasing. The same conclusions could be drawn for the carbon compounds that accumulate on the surface during storage. The measurements reveal a gradual reduction in surface Al as the alkali solution temperature and/or degreasing time are increased. When degreasing was conducted at 70 °C for 30 s the surface was practically free from Al which was present only in small islands. Furthermore the experiments showed that the thickness of the oxide film covering the surfaces before and after alkaline degreasing is approximately 20 Å. The main constituents of the film varied from ZnAl hydroxide/oxide to Zn hydroxide/oxide before and after degreasing respectively.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Materials Engineering
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Materialteknik
@attributes:
lang: eng
topic: AES; corrosion; galvanized steel; ToF-SIMS; XPS
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
4
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Berger
Robert
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affiliation:
Högskolan Dalarna
Materialvetenskap
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authority: du
namePart:
Bexell
Ulf
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roleTerm: aut
affiliation:
Högskolan Dalarna
Materialvetenskap
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Stavlid
N.
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roleTerm: aut
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type: personal
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Grehk
Mikael
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Högskolan Dalarna
Materialvetenskap
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originInfo:
dateIssued: 2006
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type: host
titleInfo:
title: Surface and Interface Analysis
identifier:
0142-2421
1096-9918
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type: volume
number: 38
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type: issue
number: 7
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start: 1130
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