Microstructure and corrosion resistance of warm sprayed titanium coatings with polymer sealing for corrosion protection of AZ91E magnesium alloy

B. Morończyk , E. Ura-Bińczyk , S. Kuroda , J. Jaroszewicz , Rafał Molak

Abstract

Thermally sprayed coatings are one of the potential ways to increase corrosion performance of Mg alloys dedicated for aircraft applications. In our research, a novel thermal spray process called Warm Spraying (WS) was used to deposit Ti coatings onto AZ91E magnesium alloy. WS gives us the possibility to control the temperature of the sprayed particles by changing the nitrogen flow rate (NFR) what as a result determine the porosity of WS coatings. The microstructure, porosity and oxygen content of coatings deposited under three different NFR was determined. A relation between porosity, oxygen content and NFR was revealed. The corrosion testing in 3.5% NaCl solution of as-sprayed coatings revealed their poor corrosion resistance that led to fast degradation of the substrate. The following post-treatment with epoxy-based polymer resulted in a significant improvement of the corrosion performance of Ti warm sprayed coatings.
Author B. Morończyk
B. Morończyk,,
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, E. Ura-Bińczyk
E. Ura-Bińczyk,,
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, S. Kuroda
S. Kuroda,,
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, J. Jaroszewicz
J. Jaroszewicz,,
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, Rafał Molak (FME / DMPE)
Rafał Molak,,
- Department of Material and Production Engineering
Journal seriesSurface and Coatings Technology, ISSN 0257-8972, (N/A 100 pkt)
Issue year2019
Vol363
Pages142-151
Publication size in sheets0.5
Keywords in Englishcorrosion resistance, Magnesium alloys, Titanium coatings, warm spraying
ASJC Classification2505 Materials Chemistry; 2508 Surfaces, Coatings and Films; 3110 Surfaces and Interfaces; 3104 Condensed Matter Physics; 1600 General Chemistry
DOIDOI:10.1016/j.surfcoat.2019.02.023
Internal identifier000045184
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreBUT score = 42.0
Ministerial score = 100.0, 12-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.359; WoS Impact Factor: 2018 = 3.192 (2) - 2018=3.11 (5)
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