A Comparative Study of the Initial Corrosion of KCl and PbCl2 on a Low-Alloyed Steel
Artikel i vetenskaplig tidskrift, 2017

Heat exchange surfaces in biomass- and waste-fired boilers are exposed to corrosive species due to the considerable amounts of alkali chlorides and PbCl2 which are released during combustion. The corrosivity of alkali chlorides toward superheater alloys exposed at high temperature has been studied extensively. However, at lower material temperatures, i.e., at waterwall conditions, considerably less research has been performed. In order to investigate the effect of small amounts of KCl and PbCl2 during the initial stages of the corrosion attack, a Fe–2.25Cr–1Mo steel was exposed for 24 h in an atmospheres consisting of O2 + H2O + N2 at 400 °C. Both KCl and PbCl2 resulted in an increased corrosion rate compared to the reference. The aim of the present paper is to investigate the influence of KCl and PbCl2 on the initial oxidation of a Fe–2.25Cr–1Mo steel. The work involves a detailed microstructural investigation as well as thermodynamic equilibrium calculations.

Waste combustion

Low-alloyed steel

PbCl2

Waterwalls

KCl

Författare

Erik Larsson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Hans Gruber

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Kristina M Hellström

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Torbjörn Jonsson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Jesper Liske

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Jan-Erik Svensson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. 87 5-6 779-787

Ämneskategorier

Kemi

DOI

10.1007/s11085-017-9765-x

Mer information

Skapat

2017-10-07