The influence of Si on the primary protection of lean FeCrAl model alloys in O2 and O2+H2O at 600 °C: A microstructural investigation
Artikel i vetenskaplig tidskrift, 2021

The present study investigates the influence of Si on the high-temperature corrosion behavior of lean FeCrAl model alloys in O2 and O2+H2O at 600 °C. The addition of Si prevented breakaway oxidation in O2+H2O which may be explained by the increased Al-content and reduced Cr-content in the oxide (O2) as well as the Si-enrichment in the outer part of the scale (O2+H2O). A proposed explanation for the impact of Si-addition on the Cr- and Al-content was given by thermodynamic calculations which showed that the presence of Si increases the activity of Al in the alloy while reducing the activity of Cr.

C. High temperature corrosion

A. Silicon

B. SEM

C. Thermodynamic diagrams

A. FeCrAl

B. STEM

Författare

Vijayshankar Asokan

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

Johan Eklund

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

Sedigheh Bigdeli

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

Torbjörn Jonsson

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

Corrosion Science

0010-938X (ISSN)

Vol. 179 109155

Ämneskategorier

Annan kemi

Metallurgi och metalliska material

Korrosionsteknik

DOI

10.1016/j.corsci.2020.109155

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Senast uppdaterat

2021-01-13