Long-term corrosion behavior of FeCr(Al, Ni) alloys in O2 + H2O with KCl(s) at 600 °C: Microstructural evolution after breakaway oxidation
Artikel i vetenskaplig tidskrift, 2024

The microstructural evolution of the oxide scales formed on FeCr(Al,Ni) alloys after breakaway oxidation was studied in 5 % O2 + 20 % H2O + N2 (Bal) + KCl(s)/KCl(g) at 600 °C for 168, 1000 and 8000 h. The SEM/EDS, SEM/EBSD and XRD investigation show that all alloys experience breakaway oxidation and form multi-layered scales. Experimental results, thermodynamic modelling and kinetic simulations show that FeCrAl and FeCrNi alloys form chromium-rich spinel oxide in inward-growing scales which transform into a protective corundum-type oxide as the oxidation progresses, while FeCr alloy experiences fast oxidation and maintains a non-protective spinel oxide/internal oxidation after long exposures.

Breakaway oxidation

EBSD

High temperature corrosion

Phase transformation

Alloy

Författare

Vicent Ssenteza

Chalmers, Kemi och kemiteknik, Energi och material

Johan Eklund

Chalmers, Kemi och kemiteknik, Energi och material

S. Bigdeli

Höganäs

Torbjörn Jonsson

Chalmers, Kemi och kemiteknik, Energi och material

Corrosion Science

0010-938X (ISSN)

Vol. 226 111654

Ämneskategorier

Materialkemi

Metallurgi och metalliska material

Korrosionsteknik

DOI

10.1016/j.corsci.2023.111654

Mer information

Senast uppdaterat

2023-12-08