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Study on Constructing Indoor Accelerated Simulation Methods for Steel with Galvalume Coating Exposed to Marine Atmosphere.

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Názov: Study on Constructing Indoor Accelerated Simulation Methods for Steel with Galvalume Coating Exposed to Marine Atmosphere.
Autori: Wang, Luntao, Wang, Hongkai, Li, Bo, Yu, Hao, Zhang, Hao, Chen, Junhang, Yin, Chenghui, Xiao, Kui
Zdroj: Metals (2075-4701); Oct2025, Vol. 15 Issue 10, p1143, 20p
Predmety: STEEL corrosion, CORROSION resistance, METAL coating, SCANNING electron microscopy, ACCELERATED life testing, X-ray diffraction, MARINE pollution, ELECTROCHEMICAL analysis
Abstrakt: To investigate the corrosion behavior and mechanism of steel with galvalume coating (Zn–55%Al–1.6%Si) in marine atmospheric environments, an indoor accelerated corrosion test method was constructed. Both marine atmospheric exposure tests and spectrum-based accelerated corrosion tests were carried out to compare the corrosion kinetics, corrosion products, and electrochemical behavior. A corrosion prediction model was established using the weight-loss method. Surface morphologies were observed by scanning electron microscopy (SEM), the compositions of corrosion products were identified by X-ray diffraction (XRD), and electrochemical tests were conducted to elucidate the time-dependent electrochemical characteristics. The results showed that after two years of natural exposure and 16 cycles of accelerated testing, the specimens exhibited mainly uniform corrosion of the galvalume coating without significant localized corrosion. The corrosion products were primarily composed of ZnO, Zn5(OH)6(CO3)2, Zn5(OH)8Cl2·H2O, and Al2O3. The corrosion potential increased while the corrosion current density decreased with prolonged testing, indicating that the corrosion product film effectively inhibited corrosion and enhanced protection. By integrating the corrosion kinetics, product composition, and electrochemical mechanism from both outdoor and indoor tests, the constructed spectrum-based accelerated test method demonstrated good correlation with actual marine atmospheric corrosion processes, providing a reliable approach for evaluating the corrosion resistance and service life of steel with galvalume coating in marine environments. [ABSTRACT FROM AUTHOR]
Copyright of Metals (2075-4701) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Study on Constructing Indoor Accelerated Simulation Methods for Steel with Galvalume Coating Exposed to Marine Atmosphere.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Luntao%22">Wang, Luntao</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+Hongkai%22">Wang, Hongkai</searchLink><br /><searchLink fieldCode="AR" term="%22Li%2C+Bo%22">Li, Bo</searchLink><br /><searchLink fieldCode="AR" term="%22Yu%2C+Hao%22">Yu, Hao</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Hao%22">Zhang, Hao</searchLink><br /><searchLink fieldCode="AR" term="%22Chen%2C+Junhang%22">Chen, Junhang</searchLink><br /><searchLink fieldCode="AR" term="%22Yin%2C+Chenghui%22">Yin, Chenghui</searchLink><br /><searchLink fieldCode="AR" term="%22Xiao%2C+Kui%22">Xiao, Kui</searchLink>
– Name: TitleSource
  Label: Source
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  Data: Metals (2075-4701); Oct2025, Vol. 15 Issue 10, p1143, 20p
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22STEEL+corrosion%22">STEEL corrosion</searchLink><br /><searchLink fieldCode="DE" term="%22CORROSION+resistance%22">CORROSION resistance</searchLink><br /><searchLink fieldCode="DE" term="%22METAL+coating%22">METAL coating</searchLink><br /><searchLink fieldCode="DE" term="%22SCANNING+electron+microscopy%22">SCANNING electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22ACCELERATED+life+testing%22">ACCELERATED life testing</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22MARINE+pollution%22">MARINE pollution</searchLink><br /><searchLink fieldCode="DE" term="%22ELECTROCHEMICAL+analysis%22">ELECTROCHEMICAL analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To investigate the corrosion behavior and mechanism of steel with galvalume coating (Zn–55%Al–1.6%Si) in marine atmospheric environments, an indoor accelerated corrosion test method was constructed. Both marine atmospheric exposure tests and spectrum-based accelerated corrosion tests were carried out to compare the corrosion kinetics, corrosion products, and electrochemical behavior. A corrosion prediction model was established using the weight-loss method. Surface morphologies were observed by scanning electron microscopy (SEM), the compositions of corrosion products were identified by X-ray diffraction (XRD), and electrochemical tests were conducted to elucidate the time-dependent electrochemical characteristics. The results showed that after two years of natural exposure and 16 cycles of accelerated testing, the specimens exhibited mainly uniform corrosion of the galvalume coating without significant localized corrosion. The corrosion products were primarily composed of ZnO, Zn<subscript>5</subscript>(OH)<subscript>6</subscript>(CO<subscript>3</subscript>)<subscript>2</subscript>, Zn<subscript>5</subscript>(OH)<subscript>8</subscript>Cl<subscript>2</subscript>·H<subscript>2</subscript>O, and Al<subscript>2</subscript>O<subscript>3</subscript>. The corrosion potential increased while the corrosion current density decreased with prolonged testing, indicating that the corrosion product film effectively inhibited corrosion and enhanced protection. By integrating the corrosion kinetics, product composition, and electrochemical mechanism from both outdoor and indoor tests, the constructed spectrum-based accelerated test method demonstrated good correlation with actual marine atmospheric corrosion processes, providing a reliable approach for evaluating the corrosion resistance and service life of steel with galvalume coating in marine environments. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Metals (2075-4701) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/met15101143
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 20
        StartPage: 1143
    Subjects:
      – SubjectFull: STEEL corrosion
        Type: general
      – SubjectFull: CORROSION resistance
        Type: general
      – SubjectFull: METAL coating
        Type: general
      – SubjectFull: SCANNING electron microscopy
        Type: general
      – SubjectFull: ACCELERATED life testing
        Type: general
      – SubjectFull: X-ray diffraction
        Type: general
      – SubjectFull: MARINE pollution
        Type: general
      – SubjectFull: ELECTROCHEMICAL analysis
        Type: general
    Titles:
      – TitleFull: Study on Constructing Indoor Accelerated Simulation Methods for Steel with Galvalume Coating Exposed to Marine Atmosphere.
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          Name:
            NameFull: Wang, Luntao
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            NameFull: Wang, Hongkai
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            NameFull: Li, Bo
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            NameFull: Yu, Hao
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            – D: 01
              M: 10
              Text: Oct2025
              Type: published
              Y: 2025
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