A time-resolved study of PbCl2-induced corrosion of low-alloyed steel in the presence of water vapour at 400 °C
Journal article, 2024
A laboratory study of a low-alloyed steel (T22) exposed to an 5% O2 + 20% H2O + N2 bal. gas in the presence of PbCl2(s) and PbO(s) at 400 °C is presented. The presence of PbCl2(s) strongly accelerates corrosion by promoting oxide delamination and crack formation. The corrosion attack is explained according to an electrochemical mechanism, involving the inward diffusion of chlorine ions and formation of metal chlorides at the metal/oxide interface. The role of Cl in PbCl2-indcued corrosion of low-alloyed steels is argued to be the major driving force while the role of Pb in the corrosion attack is minor.
PbO
PbCl -induced corrosion 2
Low-alloyed steel
High temperature corrosion
Author
Hampus Lindmark
Chalmers, Chemistry and Chemical Engineering, Energy and Material
Torbjörn Jonsson
Chalmers, Chemistry and Chemical Engineering, Energy and Material
Jesper Liske
Chalmers, Chemistry and Chemical Engineering, Energy and Material
Published in
Corrosion Science
0010-938X (ISSN)
Vol. 229 art. no 111843Categorizing
Subject Categories (SSIF 2011)
Materials Chemistry
Identifiers
DOI
10.1016/j.corsci.2024.111843