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

Okonkwo BO, Ming H, Zhang Z, Wang J, Rahimi E, Hosseinpour S, Davoodi A (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Corrosion Science Elsevier

DOI: 10.1016/j.corsci.2019.03.027

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.

Authors with CRIS profile

Saman Hosseinpour Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik

Involved external institutions

Institute of Metal Research Chinese Academy of Sciences (IMR CAS) CN China (CN) Ferdowsi University of Mashhad IR Iran, Islamic Republic of (IR)

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).

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