Abstract
The high-performance polymer-metal hybrids (PMH) have received widespread attention in the automotive field. In this study, needle-like structures were formed on the aluminum alloy (Al) surface by secondary anodizing. Based on that, the Al surface was further silanized. The surface-treated Al was then connected to polyformaldehyde (POM) by ultrasonic-assisted hot pressing molding to fabricate POM-Al hybrids. The source of the bonding strength of POM-Al hybrids has been systematically explained. When the POM embedding rate reached 91.32 % and the interface coexisted with Al-O-Si and Al-O-C bonds, the bonding strength reached 46.89 MPa, representing a 129 % increase against primary anodization. Furthermore, the bonding strength was able to exceed 40 MPa in a salt spray environment and high-temperature conditions. In general, these results can facilitate the development and application of PMH products in practical engineering.
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