1. A method for preparing alloy coating on the aluminum alloy substrate via laser cladding technology to prevent the galvanic corrosion of TC4/5083 couple.
- Author
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Liu, Quanbing, Liu, Zongde, Shen, Yue, Chang, Yanru, Li, Jiaxuan, and Xiao, Yi
- Subjects
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ALUMINUM alloys , *ALUMINUM alloying , *ELECTROLYTIC corrosion , *TITANIUM alloys , *SALT spray testing , *CORROSION resistance , *SHEAR strength - Abstract
• The laser-cladded Cu-Ni-Cr alloy coating was prepared on aluminum alloy substrate. • The shear strength of Cu-Ni-Cr alloy coating is larger than the substrate. • The Cu-Ni-Cr alloy coating has excellent resistance to galvanic corrosion with TC4. The Cu-Ni-Cr alloy coating was prepared on 5083 aluminum alloy substrate using laser cladding technology. The microstructure of the coating and its galvanic corrosion resistance in contact with TC4 alloy were studied. The results indicate that the Cu-Ni-Cr alloy coating primarily consists of Al-rich dendrite phase and Cu-rich matrix phase. The shear strength of the Cu-Ni-Cr alloy coating is 154.68 MPa, which is greater than that of the aluminum alloy substrate. The galvanic current density of the TC4/Cu-Ni-Cr couple is 0.05 μA·cm−2. The neutral salt spray corrosion test results demonstrate that the Cu-Ni-Cr alloy coating exhibits excellent resistance to galvanic corrosion. The coating can attenuate the galvanic corrosion effect when it is in contact with the TC4 titanium alloy, offering new solutions to address the galvanic corrosion challenges between titanium alloy and aluminum alloy in marine environments. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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