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Enhanced wear and corrosion resistances of Al coated Mg alloy using high pressure cold sprayed commercially pure-zirconium coating
•Considerable densification of beneath deposited Al layers caused by Zr particles.•Highest Rpol and |Z|f=0.01Hz values were obtained for Zr/Al coated Mg alloy.•Surface film thickness was 34.40 for Al and 29.90 nm for Zr/Al after 24 h immersion.•Zr/Al coating immersed for 24 h showed a passive potent...
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Published in: | Materials letters 2023-09, Vol.346, p.134473, Article 134473 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •Considerable densification of beneath deposited Al layers caused by Zr particles.•Highest Rpol and |Z|f=0.01Hz values were obtained for Zr/Al coated Mg alloy.•Surface film thickness was 34.40 for Al and 29.90 nm for Zr/Al after 24 h immersion.•Zr/Al coating immersed for 24 h showed a passive potential for a wide range of pHs.•Zr with smaller crystallite size/higher dislocation density showed lower wear rate.
Commercially pure (CP) Zr coating with high microhardness (387 ± 26 HV0.025) was produced on CP-Al coated Mg alloy by a high pressure cold spray (HPCS) system. Substantial densification of Al layers, beneath deposited Zr coating, was observed because of shot-peening influence by Zr particles. The electrochemical impedance spectroscopy after 24 h of immersion in 3.5 wt% NaCl electrolyte revealed highest charge transfer resistance (Rct), polarization resistance (Rpol), and corrosion resistance (|Z|f=0.01Hz) for the Zr/Al coated Mg alloy. Also, wear rate for the Zr/Al coating was lowest which could be attributed to its higher hardness caused by smaller crystallite size and higher dislocation density. |
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ISSN: | 0167-577X 1873-4979 |
DOI: | 10.1016/j.matlet.2023.134473 |