View in EDS HTML Full Text PDF Full Text

Corrosion Behavior of Ultra-High-Strength Hot-Press-Formed B-Pillar Parts.

Saved in:
Bibliographic Details
Title: Corrosion Behavior of Ultra-High-Strength Hot-Press-Formed B-Pillar Parts.
Authors: Ahn, KyungBin1 (AUTHOR), Jin, JuYeon2 (AUTHOR), Oh, JoungSeok3 (AUTHOR), Jang, HeeJin1,2 (AUTHOR) heejin@chosun.ac.kr
Source: Materials (1996-1944). Mar2026, Vol. 19 Issue 5, p976. 13p.
Subjects: Crack formation in solids, Corrosion engineering, High strength steel, Aluminum-silicon alloys, Hot pressing, Polarization (Electrochemistry), Automobile parts
Abstract: The corrosion behavior of hot-press-formed (HPF) B-pillar components fabricated from Al–Si-coated boron steel was investigated with an emphasis on the forming-induced crack morphology. The specimens were extracted from the inner and outer surfaces of the top, flat, and radius regions. Microstructural characteristics and coating cracks were examined using optical microscopy, as well as field-emission scanning electron microscopy (FE-SEM) in combination with energy-dispersive spectroscopy (EDS), and corrosion behavior was evaluated using cyclic corrosion immersion and potentiodynamic polarization tests in a 3.5 wt.% NaCl aqueous solution. The Al–Si coating exhibited a multilayered structure composed of alternating Al- and Fe-rich layers. The crack morphology strongly depended on the local stress state: wide macrocracks were mainly formed on the outer surface of the radius region under tensile deformation, whereas the narrow microcracks predominated on the inner surface subjected to compressive deformation. Cyclic corrosion immersion tests showed that the corrosion propagated preferentially along the coating cracks and was more severe on the inner surfaces, where narrow microcracks promoted aggressive crevice corrosion owing to chloride ion accumulation and local acidification. By contrast, wider macrocracks on the outer surface mitigated crevice corrosion by allowing electrolyte exchange. Potentiodynamic polarization tests indicated similar corrosion rates for all regions; however, the outer radius region exhibited a relatively noble corrosion potential owing to oxide film formation on the locally exposed substrate areas. These results demonstrate that the crack morphology induced by curved forming is a key factor governing the corrosion behavior of HPF B-pillar components. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) 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.)
Database: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 192640248
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Corrosion Behavior of Ultra-High-Strength Hot-Press-Formed B-Pillar Parts.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Ahn%2C+KyungBin%22">Ahn, KyungBin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jin%2C+JuYeon%22">Jin, JuYeon</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Oh%2C+JoungSeok%22">Oh, JoungSeok</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jang%2C+HeeJin%22">Jang, HeeJin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> heejin@chosun.ac.kr</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Mar2026, Vol. 19 Issue 5, p976. 13p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Crack+formation+in+solids%22">Crack formation in solids</searchLink><br /><searchLink fieldCode="DE" term="%22Corrosion+engineering%22">Corrosion engineering</searchLink><br /><searchLink fieldCode="DE" term="%22High+strength+steel%22">High strength steel</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum-silicon+alloys%22">Aluminum-silicon alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Hot+pressing%22">Hot pressing</searchLink><br /><searchLink fieldCode="DE" term="%22Polarization+%28Electrochemistry%29%22">Polarization (Electrochemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Automobile+parts%22">Automobile parts</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The corrosion behavior of hot-press-formed (HPF) B-pillar components fabricated from Al–Si-coated boron steel was investigated with an emphasis on the forming-induced crack morphology. The specimens were extracted from the inner and outer surfaces of the top, flat, and radius regions. Microstructural characteristics and coating cracks were examined using optical microscopy, as well as field-emission scanning electron microscopy (FE-SEM) in combination with energy-dispersive spectroscopy (EDS), and corrosion behavior was evaluated using cyclic corrosion immersion and potentiodynamic polarization tests in a 3.5 wt.% NaCl aqueous solution. The Al–Si coating exhibited a multilayered structure composed of alternating Al- and Fe-rich layers. The crack morphology strongly depended on the local stress state: wide macrocracks were mainly formed on the outer surface of the radius region under tensile deformation, whereas the narrow microcracks predominated on the inner surface subjected to compressive deformation. Cyclic corrosion immersion tests showed that the corrosion propagated preferentially along the coating cracks and was more severe on the inner surfaces, where narrow microcracks promoted aggressive crevice corrosion owing to chloride ion accumulation and local acidification. By contrast, wider macrocracks on the outer surface mitigated crevice corrosion by allowing electrolyte exchange. Potentiodynamic polarization tests indicated similar corrosion rates for all regions; however, the outer radius region exhibited a relatively noble corrosion potential owing to oxide film formation on the locally exposed substrate areas. These results demonstrate that the crack morphology induced by curved forming is a key factor governing the corrosion behavior of HPF B-pillar components. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=192640248
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/ma19050976
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 976
    Subjects:
      – SubjectFull: Crack formation in solids
        Type: general
      – SubjectFull: Corrosion engineering
        Type: general
      – SubjectFull: High strength steel
        Type: general
      – SubjectFull: Aluminum-silicon alloys
        Type: general
      – SubjectFull: Hot pressing
        Type: general
      – SubjectFull: Polarization (Electrochemistry)
        Type: general
      – SubjectFull: Automobile parts
        Type: general
    Titles:
      – TitleFull: Corrosion Behavior of Ultra-High-Strength Hot-Press-Formed B-Pillar Parts.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Ahn, KyungBin
      – PersonEntity:
          Name:
            NameFull: Jin, JuYeon
      – PersonEntity:
          Name:
            NameFull: Oh, JoungSeok
      – PersonEntity:
          Name:
            NameFull: Jang, HeeJin
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 19961944
          Numbering:
            – Type: volume
              Value: 19
            – Type: issue
              Value: 5
          Titles:
            – TitleFull: Materials (1996-1944)
              Type: main
ResultId 1