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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 (Department of Mechanical Engineering, IKG Punjab Technical University, Kapurthala, India and Department of Mechanical Engineering, Chitkara University, Rajpura, Punjab)
Buta Singh Sidhu (Department of Mechanical Engineering, M.R.S. Punjab Technical University, Bathinda, India)
Vikas Chawla (Department of Mechanical Engineering, IKG Punjab Technical University, Kapurthala, India)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 5 March 2018

Issue publication date: 23 March 2018

189

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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