Title : ( Microscale investigation of the correlation between microstructure and galvanic corrosion of low alloy steel A508 and its welded 309/308L stainless steel overlayer )
Authors: Bright O. Okonkwo , Hongliang Ming , Zhiming Zhang , Jianqiu Wang , Ehsan Rahimi , Saman Hosseinpour , Ali Davoodi ,
Full TextAbstract
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 inthe 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.
Keywords
Low alloy steel Stainless steel SEM AFM Interface Inclusion
@article{paperid:1074300,
author = {Bright O. Okonkwo and Hongliang Ming and Zhiming Zhang and Jianqiu Wang and Rahimi, Ehsan and Saman Hosseinpour and Davoodi, Ali},
title = {Microscale investigation of the correlation between microstructure and galvanic corrosion of low alloy steel A508 and its welded 309/308L stainless steel overlayer},
journal = {Corrosion Science},
year = {2019},
volume = {154},
month = {July},
issn = {0010-938X},
pages = {49--60},
numpages = {11},
keywords = {Low alloy steel
Stainless steel
SEM
AFM
Interface
Inclusion},
}
%0 Journal Article
%T Microscale investigation of the correlation between microstructure and galvanic corrosion of low alloy steel A508 and its welded 309/308L stainless steel overlayer
%A Bright O. Okonkwo
%A Hongliang Ming
%A Zhiming Zhang
%A Jianqiu Wang
%A Rahimi, Ehsan
%A Saman Hosseinpour
%A Davoodi, Ali
%J Corrosion Science
%@ 0010-938X
%D 2019
