JOURNAL ARTICLE

Effect of Ai–Si coating weights on corrosion of ultra-high-strength steel UsiborR 1500 used in automotive structures.

  • Published In: Corrosion Engineering, Science & Technology, 2023, v. 58, n. 7. P. 659 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Onyishi, Hilary A.; Okafor, Anthony C.; Sohmshetty, Raj 3 of 3

Abstract

This article investigates the corrosion behavior of indirect hot-stamped Ultra-High-Strength Steel (UHSS) Usibor® 1500 coated with two different Aluminium-Silicon (Al–Si) coating weights, AS80 (80 g/m²) and AS150 (150 g/m²), under cyclic corrosion testing conditions. The study found that both AS80 and AS150 coatings provide significantly better perforation corrosion resistance than bare 22MnB5 steel, with corrosion depths under 200 µm compared to approximately 900 µm for the bare steel. AS150 exhibited superior resistance to cosmetic corrosion, while AS80 showed higher resistance to red rust pitting corrosion, attributed to its finer surface morphology and more uniform paint distribution; additionally, thicker electrodeposited (e-coat) paint layers (15 µm) improved red rust pitting resistance over thinner layers (8 µm). These findings support the use of Al–Si coatings on Usibor® 1500 for enhanced corrosion protection in automotive structural components such as A-pillars, B-pillars, and bumper beams.

Additional Information

  • Source:Corrosion Engineering, Science & Technology. 2023/10, Vol. 58, Issue 7, p659
  • Document Type:Article
  • Subject Area:Social Sciences and Humanities
  • Publication Date:2023
  • ISSN:1478-422X
  • DOI:10.1080/1478422X.2023.2245643
  • Accession Number:172309864
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