Applicability of ToF-SIMS and stable oxygen isotopes in KCl-induced
corrosion studies at high temperatures

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Juho Lehmusto, Mikael Bergelin, Jingxin Sui, Jyrki Juhanoja, Bengt-Johan Skrifvars, Patrik Yrjas
Publisher: Elsevier
Publication year: 2017
Journal: Corrosion Science
Journal acronym: Corros. Sci.
Volume number: 125
Start page: 1
End page: 11


Abstract

The applicability of Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) in combination with the use of stable oxygen isotopes (16O and 18O) in high-temperature corrosion research was addressed in this study. In terms of the corrosion reaction timescale, the focus was on the initiation of KCl-induced high-temperature corrosion and on the behaviour of three commercial alloys under conditions where multiple oxygen sources (air and water vapour) were present.
ToF-SIMS proved to be an applicable tool in high-temperature corrosion studies, in this case, providing detailed information about the distribution of the two oxygen isotopes at the sample surfaces. Oxygen from air prefers to form a solid intermediate, potassium chromate (K2CrO4), when reacting with a chromia-forming alloy, whereas oxygen from both sources was found in the oxide formed at the alloy surface. Regardless of the prevailing conditions, the nickel-based austenitic alloy withstood corrosion the best, then the iron-based high alloy austenitic steel, whereas the low alloy ferritic steel had the poorest corrosion resistance ability.


Keywords

high-temperature corrosion, Low alloy steel, Oxidation, Stainless steel

Last updated on 2019-26-06 at 06:09