Microscale investigation of the correlation between microstructure and galvanic corrosion of low alloy steel A508 and its welded 309/308L stainless steel overlayer

Journal article


Publication Details

Author(s): Okonkwo BO, Ming H, Zhang Z, Wang J, Rahimi E, Hosseinpour S, Davoodi A
Journal: Corrosion Science
Publication year: 2019
ISSN: 0010-938X


Abstract

The microscopic scale correlation between microstructure and galvanic corrosion of low alloy steel-A508 and its welded-309/308L stainless steel overlayer is investigated. Microstructural characterization shows that the welding process induces complexities at HAZ of the base metal. The microstructure of HAZ changes from tempered bainite to a non-uniform mixture of martensite and bainite, depending on the heat flow. This change in the microstructure leads to a heterogeneous corrosion attack on the base metal (anode), while the weld metal (cathode) is protected in a galvanic interaction. The extent and rate of corrosion attacks on the surface constituents are quantified by AFM.


FAU Authors / FAU Editors

Hosseinpour, Saman Dr.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik


External institutions with authors

Ferdowsi University of Mashhad
Institute of Metal Research Chinese Academy of Sciences (IMR CAS)


How to cite

APA:
Okonkwo, B.O., Ming, H., Zhang, Z., Wang, J., Rahimi, E., Hosseinpour, S., & Davoodi, A. (2019). Microscale investigation of the correlation between microstructure and galvanic corrosion of low alloy steel A508 and its welded 309/308L stainless steel overlayer. Corrosion Science. https://dx.doi.org/10.1016/j.corsci.2019.03.027

MLA:
Okonkwo, Bright O., et al. "Microscale investigation of the correlation between microstructure and galvanic corrosion of low alloy steel A508 and its welded 309/308L stainless steel overlayer." Corrosion Science (2019).

BibTeX: 

Last updated on 2019-15-05 at 23:08