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http://hdl.handle.net/2445/173107
Title: | Effect of the outer layer of Al coatings deposited by cold gas spray on the microstructure, mechanical properties and corrosion resistance of the AA 7075-T6 aluminum alloy |
Author: | Da Silva, F. S. Cinca i Luis, Núria Dosta Parras, Sergi García Cano, Irene Guilemany, J. M. (José María) Benedetti, Assis Vicente |
Keywords: | Alumini Revestiment metàl·lic Corrosió i anticorrosius Aluminum Metal coating Corrosion and anti-corrosives |
Issue Date: | 31-Mar-2020 |
Publisher: | ASM International |
Abstract: | The corrosion of AA 7075-T6 aluminum alloy is a critical issue for many industries. In this study, aluminum coatings were deposited onto AA 7075-T6 by cold gas spray and the effect of the porous outer layer on different properties of the coating, including corrosion-resistance was investigated. As-prepared and polished samples were used to study the microstructure, morphology, mechanical properties and corrosion resistance of the coating in 3.5 wt.% NaCl solution. Cross-sectional analysis showed a dense structure, low porosity (0.8%) and thickness up to 300 lm (* 100 lm for the porous outer layer and * 200 lm for the compact inner layer). The sliding wear test resulted in a volume loss of 3.2 9 10-4 mm3/Nm with an adhesive wear mechanism. The abrasive wear test showed a wear rate of 1.1 9 10-4 mm3/Nm for the asprepared coating and 0.8 9 10-4 mm3/Nm for the polished coating. The as-prepared coating pores and interparticle spacing in the outer layer were mostly responsible for the increase in wear rate. For the polished coating immersed in 3.5 wt.% NaCl solution during 900 h, the electrolyte reached some specific points of the substrate as revealed by the cross-sectional analysis. Inspection of the as-prepared coating demonstrated that the coating/substrate interface. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/s11666-020-01023-8 |
It is part of: | Journal of Thermal Spray Technology, 2020, vol. 29, p. 1040-1053 |
URI: | http://hdl.handle.net/2445/173107 |
Related resource: | https://doi.org/10.1007/s11666-020-01023-8 |
ISSN: | 1059-9630 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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File | Description | Size | Format | |
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705944.pdf | 2.89 MB | Adobe PDF | View/Open |
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