Thermal stability of the CoWO4 layer formed on ferritic stainless steel

Lu Gan; Toshiyuki Nishimura; Saad Ahmed Sheikh; Isao Saeki; Hideyuki Murakami

doi:10.1016/j.corsci.2020.109037

Thermal stability of the CoWO₄ layer formed on ferritic stainless steel

Lu Gan, Toshiyuki Nishimura, Saad Ahmed Sheikh, Isao Saeki, Hideyuki Murakami^*

^*Corresponding author for this work

Graduate School of Advanced Science and Engineering

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

4 Citations (Scopus)

Abstract

This study focuses on the temperature capability of CoWO₄ as the oxidation protection layer of ferritic stainless steel (FSS). The thermogravimetric-differential thermal analysis revealed that until CoWO₄ started to melt at 1297 °C, little mass change was observed. In addition, the coefficient of thermal expansion of CoWO₄ was 11.5 ± 0.2 (×10⁻⁶ K⁻¹), which was similar to that of FSS, evidencing its good thermal stability and compatibility for the protection of FSS. The oxidation test of the Co–W coated specimens at 700 °C – 1000 °C in air confirmed effectiveness of the CoWO₄ layer at T ≤ 850 °C.

Original language	English
Article number	109037
Journal	Corrosion Science
Volume	176
DOIs	https://doi.org/10.1016/j.corsci.2020.109037
Publication status	Published - 2020 Nov

Keywords

Oxidation
Oxide coatings
SEM
Stainless steel

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

Access to Document

10.1016/j.corsci.2020.109037

Cite this

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title = "Thermal stability of the CoWO4 layer formed on ferritic stainless steel",

abstract = "This study focuses on the temperature capability of CoWO4 as the oxidation protection layer of ferritic stainless steel (FSS). The thermogravimetric-differential thermal analysis revealed that until CoWO4 started to melt at 1297 °C, little mass change was observed. In addition, the coefficient of thermal expansion of CoWO4 was 11.5 ± 0.2 (×10−6 K−1), which was similar to that of FSS, evidencing its good thermal stability and compatibility for the protection of FSS. The oxidation test of the Co–W coated specimens at 700 °C – 1000 °C in air confirmed effectiveness of the CoWO4 layer at T ≤ 850 °C.",

keywords = "Oxidation, Oxide coatings, SEM, Stainless steel",

author = "Lu Gan and Toshiyuki Nishimura and Sheikh, {Saad Ahmed} and Isao Saeki and Hideyuki Murakami",

note = "Funding Information: This research was financially supported by the NIMS research program . The authors are thankful to Ms. H. GAO from NIMS for her assistance with the SEM analysis. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

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doi = "10.1016/j.corsci.2020.109037",

language = "English",

volume = "176",

journal = "Corrosion Science",

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T1 - Thermal stability of the CoWO4 layer formed on ferritic stainless steel

AU - Gan, Lu

AU - Nishimura, Toshiyuki

AU - Sheikh, Saad Ahmed

AU - Saeki, Isao

AU - Murakami, Hideyuki

N1 - Funding Information: This research was financially supported by the NIMS research program . The authors are thankful to Ms. H. GAO from NIMS for her assistance with the SEM analysis. Publisher Copyright: © 2020 Elsevier Ltd

PY - 2020/11

Y1 - 2020/11

N2 - This study focuses on the temperature capability of CoWO4 as the oxidation protection layer of ferritic stainless steel (FSS). The thermogravimetric-differential thermal analysis revealed that until CoWO4 started to melt at 1297 °C, little mass change was observed. In addition, the coefficient of thermal expansion of CoWO4 was 11.5 ± 0.2 (×10−6 K−1), which was similar to that of FSS, evidencing its good thermal stability and compatibility for the protection of FSS. The oxidation test of the Co–W coated specimens at 700 °C – 1000 °C in air confirmed effectiveness of the CoWO4 layer at T ≤ 850 °C.

AB - This study focuses on the temperature capability of CoWO4 as the oxidation protection layer of ferritic stainless steel (FSS). The thermogravimetric-differential thermal analysis revealed that until CoWO4 started to melt at 1297 °C, little mass change was observed. In addition, the coefficient of thermal expansion of CoWO4 was 11.5 ± 0.2 (×10−6 K−1), which was similar to that of FSS, evidencing its good thermal stability and compatibility for the protection of FSS. The oxidation test of the Co–W coated specimens at 700 °C – 1000 °C in air confirmed effectiveness of the CoWO4 layer at T ≤ 850 °C.

KW - Oxidation

KW - Oxide coatings

KW - SEM

KW - Stainless steel

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