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Improving the high-temperature oxidation resistance of ASME-SA213-T11 boiler tube steel by plasma spraying with CNT-reinforced alumina coatings

Rakesh Goyal, Buta Singh Sidhu, Vikas Chawla

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 5 March 2018

Issue publication date: 23 March 2018

203

Abstract

Purpose

This paper aims to discuss that a conventional Al2O3, 1.5 Wt.% carbon nanotubes (CNTs)-Al2O3, 2 Wt.% CNTs-Al2O3 and 4 Wt.% CNTs-Al2O3 composite coatings were deposited with the help of Plasma spray process.

Design/methodology/approach

To better understand the effect of CNT reinforcement on oxidation resistance, high-temperature oxidation behaviour of conventional Al2O3, 1.5 Wt.% CNTs-Al2O3, 2 Wt.% CNTs-Al2O3 and 4 Wt.% CNTs-Al2O3 composite coatings at 900°C was compared with the performance of the uncoated ASME-SA213-T11 boiler tube steel substrate.

Findings

The results showed that the CNT-reinforced alumina coatings exhibited better oxidation resistance and thermal stability than uncoated ASME-SA213-T11 boiler tube steel. The coated steel substrates had a lower mass gain rate than the substrate after different oxidation times.

Originality/value

Limited literature is available where the CNT have been reinforced into the composite alloy powders and has been thermally spray-deposited for various surface engineering applications. This research showed that with the increase in the percentage of CNTs into the alloy powder mixture, there is a significant reduction in weight gain and hence higher resistance to oxidation.

Keywords

Citation

Goyal, R., Sidhu, B.S. and Chawla, V. (2018), "Improving the high-temperature oxidation resistance of ASME-SA213-T11 boiler tube steel by plasma spraying with CNT-reinforced alumina coatings", Anti-Corrosion Methods and Materials, Vol. 65 No. 2, pp. 217-223. https://doi.org/10.1108/ACMM-03-2017-1778

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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