Thermogravimetric studies of high temperature reactions between potassium salts and chromium

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Lehmusto J, Lindberg D, Yrjas P, Skrifvars BJ, Hupa M
Förläggare: PERGAMON-ELSEVIER SCIENCE LTD
Publiceringsår: 2012
Tidskrift: Corrosion Science
Tidskriftsakronym: CORROS SCI
Volym: 59
Artikelns första sida, sidnummer: 55
Artikelns sista sida, sidnummer: 62
Antal sidor: 8
ISSN: 0010-938X


Abstrakt

This study compares the high temperature reactions of potassium chloride (KCl) and potassium carbonate (K2CO3), two salts found in fly ashes formed in biomass combustion, with both pure metallic chromium (Cr) and chromium oxide (Cr2O3). The reactions were investigated with thermogravimetric measurements and the results discussed based on thermodynamic calculations. In simple terms: potassium chloride reacted with chromium forming potassium chromate (K2CrO4) and chromium oxide. Potassium chloride did not react with chromium oxide. Potassium carbonate reacted with chromium oxide, but not with chromium. The presence of potassium is sufficient to initiate accelerated oxidation, but chloride is needed to sustain it.


Nyckelord

High temperature corrosion, Molten salts, SEM

Senast uppdaterad 2019-16-10 vid 03:10