Effect of Chromium on the Corrosion Behaviour of Low-Alloy Steels Containing Copper in FGD Environment

The effects of chromium addition on the corrosion resistance of low alloy steels containing copper in FGD systems, were examined by electrochemical techniques in a sulphuric acid solution containing HCl. All measurements (potentiodynamic polarization test and EIS) reveal an increase in corrosion rat...

Full description

Saved in:
Bibliographic Details
Published in:International journal of electrochemical science 2013-06, Vol.8 (6), p.7498-7509
Main Authors: Park, Sun Ah, Ji, Woo Soo, Kim, Jung Gu
Format: Article
Language:English
Subjects:
Corrosion
EIS
Low-alloy steel
Polarization
Sulphuric acid
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effects of chromium addition on the corrosion resistance of low alloy steels containing copper in FGD systems, were examined by electrochemical techniques in a sulphuric acid solution containing HCl. All measurements (potentiodynamic polarization test and EIS) reveal an increase in corrosion rate with Cr content, confirming the deterioration of corrosion resistance by Cr addition. EPMA, XPS and SEM examinations of the corroded surface indicated that the addition of chromium increased corrosion damage to the steels by microgalvanic corrosion between a grain as an anode and a grain boundary as a cathode because Cu-containing steel increases the tendency to chromium segregation at grain boundaries.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)12821-5