Effect of microstructure on corrosion behavior of dual-phase steels

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SALAMCİ E., CANDAN Ş., Kabakci F.

Kovove Materialy, vol.55, no.2, pp.133-139, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 2
  • Publication Date: 2017
  • Doi Number: 10.4149/km_2017_2_133
  • Journal Name: Kovove Materialy
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.133-139
  • Keywords: Corrosion, Dual-phase steel, Epitaxial ferrite, Martensite
  • Bilecik Şeyh Edebali University Affiliated: Yes

Abstract

© 2017 Institute of Materials and Machine Mechanics, Slovak Academy of Sciences. All rights reserved.Dual phase (DP) steels with different volume fractions of martensite and epitaxial ferrite were produced in different intercritical annealing temperatures and cooling rates. Corrosion behaviors of four different DP steels were investigated in 3.5 % NaCl solution by using potentiodynamic polarization and immersion tests. The results showed that both amounts of martensite and epitaxial ferrite have an influence on the corrosion behavior of DP steels. It was observed that corrosion resistance increased considerably with the presence of epitaxial ferrite as compared to dual phase steel containing non-epitaxial ferrite. On the other hand, the corrosion resistance of DP steels decreased with an increase in the martensite volume fraction (MVF).