Should the oxygen source be considered in the initiation of KCl-induced high-temperature corrosion?

Juho Lehmusto; Mohammad Sattari; Mats Halvarsson; Leena Hupa

doi:10.1016/j.corsci.2021.109332

Should the oxygen source be considered in the initiation of KCl-induced high-temperature corrosion?

Juho Lehmusto^*
, Mohammad Sattari
, Mats Halvarsson
, Leena Hupa

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

10 Citations (Scopus)

Abstract

The role of two oxygen sources, oxygen and water vapor, in the initiation of KCl-induced high-temperature corrosion was addressed by studying two high-alloyed commercial materials at 550 °C. The differentiation between the two oxygen sources was implemented with ¹⁸O-enriched water and ¹⁶O₂.
Based on the results, the solid-solid reaction between KCl(s) and the protective oxide on the alloy surface appeared to be more responsible for corrosion than the gas-solid reaction between KCl(g) and the protective oxide. Water was more involved in the abovementioned reactions than O₂: ¹⁸O was the main oxygen isotope found in the formed surface oxides and intermediates.

Original language	English
Article number	109332
Journal	Corrosion Science
Volume	183
DOIs	https://doi.org/10.1016/j.corsci.2021.109332
Publication status	Published - 1 May 2021
MoE publication type	A1 Journal article-refereed

Keywords

Alloy
Stainless steel
SEM
SIMS
TEM
XPS
High-temperature corrosion

Access to Document

10.1016/j.corsci.2021.109332Licence: CC BY-NC-ND

Cite this

@article{9baf1a40a1eb49d0ac0cf986461bd2e4,

title = "Should the oxygen source be considered in the initiation of KCl-induced high-temperature corrosion?",

abstract = "The role of two oxygen sources, oxygen and water vapor, in the initiation of KCl-induced high-temperature corrosion was addressed by studying two high-alloyed commercial materials at 550 °C. The differentiation between the two oxygen sources was implemented with 18O-enriched water and 16O2. Based on the results, the solid-solid reaction between KCl(s) and the protective oxide on the alloy surface appeared to be more responsible for corrosion than the gas-solid reaction between KCl(g) and the protective oxide. Water was more involved in the abovementioned reactions than O2: 18O was the main oxygen isotope found in the formed surface oxides and intermediates.",

keywords = "Alloy, Stainless steel, SEM, SIMS, TEM, XPS, High-temperature corrosion",

author = "Juho Lehmusto and Mohammad Sattari and Mats Halvarsson and Leena Hupa",

year = "2021",

month = may,

day = "1",

doi = "10.1016/j.corsci.2021.109332",

language = "English",

volume = "183",

journal = "Corrosion Science",