The influence of alkali-degreasing on the chemical composition of hot-dip galvanized steel surfaces

Document identifier: oai:dalea.du.se:2687
Access full text here:10.1002/sia.2364
Keyword: Engineering and Technology, Materials Engineering, Teknik och teknologier, Materialteknik, AES; corrosion; galvanized steel; ToF-SIMS; XPS
Publication year: 2006
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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. 

Authors

Robert Berger

Högskolan Dalarna; Materialvetenskap
Other publications >>

Ulf Bexell

Högskolan Dalarna; Materialvetenskap
Other publications >>

N. Stavlid

Other publications >>

Mikael Grehk

Högskolan Dalarna; Materialvetenskap
Other publications >>

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    header: 
        identifier: oai:dalea.du.se:2687
        datestamp: 2021-04-15T12:55:12Z
        setSpec: SwePub-du
    metadata: 
        mods: 
            @attributes: 
                version: 3.7
            recordInfo: 
                recordContentSource: du
                recordCreationDate: 2007-04-04
            identifier: 
                http://urn.kb.se/resolve?urn=urn:nbn:se:du-2687
                10.1002/sia.2364
            titleInfo: 
                @attributes: 
                    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
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                Published
                4
            name: 
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                        type: personal
                    namePart: 
                        Berger
                        Robert
                    role: 
                        roleTerm: aut
                    affiliation: 
                        Högskolan Dalarna
                        Materialvetenskap
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                        type: personal
                        authority: du
                    namePart: 
                        Bexell
                        Ulf
                    role: 
                        roleTerm: aut
                    affiliation: 
                        Högskolan Dalarna
                        Materialvetenskap
                    nameIdentifier: ubx
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                        type: personal
                    namePart: 
                        Stavlid
                        N.
                    role: 
                        roleTerm: aut
                    @attributes: 
                        type: personal
                        authority: du
                    namePart: 
                        Grehk
                        Mikael
                    role: 
                        roleTerm: aut
                    affiliation: 
                        Högskolan Dalarna
                        Materialvetenskap
                    nameIdentifier: mge
            originInfo: 
                dateIssued: 2006
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                    type: host
                titleInfo: 
                    title: Surface and Interface Analysis
                identifier: 
                    0142-2421
                    1096-9918
                part: 
                    detail: 
                            @attributes: 
                                type: volume
                            number: 38
                            @attributes: 
                                type: issue
                            number: 7
                    extent: 
                        start: 1130
                        end: 1138
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            typeOfResource: text