Enhanced Wear and Corrosion Resistances of Al Coated Mg Alloy Using High Pressure Cold Sprayed Commercially Pure-Zirconium Coating
Enhanced Wear and Corrosion Resistances of Al Coated Mg Alloy Using High Pressure Cold Sprayed Commercially Pure-Zirconium Coating
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DOI：
10.1016/j.matlet.2023.134473
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发表时间：
2023-05
影响因子：
3
通讯作者：
M. Daroonparvar;A. Helmer;A. Ralls;M. U. Farooq Khan;A. Kasar;P. Menezes;M. Misra;R.K. Gupta
中科院分区：
文献类型：
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作者：
M. Daroonparvar;A. Helmer;A. Ralls;M. U. Farooq Khan;A. Kasar;P. Menezes;M. Misra;R.K. Gupta
采用高压冷喷涂（HPCS）技术在镁合金表面制备了高硬度（387 ± 26 HV0.025）的工业纯锆涂层。由于Zr颗粒的喷丸影响，在沉积的Zr涂层下，观察到Al层的实质致密化。在3.5wt%NaCl电解液中浸泡24 h后的电化学阻抗谱显示最高的电荷转移电阻（Rct）、极化电阻（Rpol）和耐腐蚀性（|Z| f=0.01Hz）。此外，Zr/Al涂层的磨损率最低，这可能归因于其更高的硬度所造成的较小的晶粒尺寸和较高的位错密度。
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.