Abstract
Corrosion behaviors of DP-type and TRIP-type cold rolled steel sheet have been investigated using cathodic Tafel extrapolation test and immersion test, measuring nano-scale hardness of various phases and the volume fraction of various phases, and analyzing inclusion and nitride. Based upon nano-scale hardness of various phases before and after potentiodynamic anodic polarization test in deaerated 5 mass% NaCl at 35 � C, the phase with the most inferior corrosion resistance in DP-type steel is martensite (� 0 ) and that in TRIP-type steel is bainite (� B). The reasons why corrosion rate of TRIP-type steel is lower than that of DP-type steel are first, the volume fraction (39.8 vol%) of bainite (� B) in TRIP-type steel is higher than that (15.9 vol%) of martensite (� 0 ) in DP-type steel and second, the corrosion resistance of oxide and nitride formed in TRIPtype steel is more than that of sulfide formed in DP-type steel. [doi:10.2320/matertrans.MRA2008252]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
