Abstract
In the automobile industry, efforts have been devoted for reducing the weight of vehicles to diminish their CO2 emissions. One effective strategy is building specific car components with multi-materials, especially lightweight metals bonded to resins. It is often challenging to combine a metal and a resin; as a solution, many studies report attempts to induce fine defects on metal surfaces through laser treatments, aiming to increase resin penetration on the surface and promote the “anchor effect.” However, because thermoplastic resins exhibit high melt viscosities, they can fail to penetrate sufficiently into surface defects. In this study, we propose a new metal-surface treatment method wherein polymer particles are adsorbed onto the metal surface through the application of a voltage in the colloid solution. We demonstrate how this technique can rapidly and simultaneously introduce defects on the metal surface through electrolysis and promote resin impregnation through adsorption of the particles into the fine defects.
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