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Corrosion reduction in steam turbine blades using nano-composite coating

Sattar, S, Alaiwi, Y, Radhi, NS, Al-Khafaji, Z, Al-Hashimi, O, Alzahrani, H and Yaseen, ZM (2023) Corrosion reduction in steam turbine blades using nano-composite coating. Journal of King Saud University - Science, 35 (8). ISSN 1018-3647

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The current study aims to reduce the hot corrosion issues in steam turbines for Al-Mussaib thermal power stations. To gain the aim of the study, many experimental tests were conducted by taking a sample from an existing broken steam turbine blade to identify the alloy composition and preparing samples with exact composition by powder metallurgy method, then using the electro-deposition method to coat the prepared samples by three different coating composite materials consists of TiO2 in different ratios (5, 10 and 15) g/l and 5 g/l SiO2 added to Watt's solution. To verify the efficiency of coating, several tests were conducted (surface roughness, hardness, wear, and oxidation test). The obtained results indicated that increasing the Ni-5%SiO2-TiO2 (5, 10 and 15) g/l caused an increase in the coating thickness, which is compatible with increasing the surface roughness. Also, the sample hardness increased after coating, which returned to increasing TiO2 amount (5, 10 and 15) g/l. However, wear resistance for the samples after coating by selected coating composite and 10 g/l TiO2 amount records the highest reduction in the wear of the sample.

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Civil Engineering & Built Environment
Publisher: Elsevier
SWORD Depositor: A Symplectic
Date Deposited: 20 Nov 2023 12:20
Last Modified: 20 Nov 2023 12:30
DOI or ID number: 10.1016/j.jksus.2023.102861
URI: https://researchonline.ljmu.ac.uk/id/eprint/21890
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