Research investigates how anodizing and conversion treatment influence adhesion in magnesium alloys, suggesting improved bonding strength.
The effects of anodizing and conversion treatment following laser irradiation on the adhesion of AZ91D magnesium alloy were investigated. Laser irradiation produced surface irregularities of approximately 10-50 μm, which increased as the scanning speed decreased. These irregularities remained after subsequent anodizing and conversion treatment, resulting in a surface morphology that was markedly different from that of the non-irradiated specimen. Adhesion tests revealed that the adhesion strength increased with decreasing laser scanning speed, indicating that the anchoring effect associated with increased surface roughness was a key factor in improving adhesion. Moreover, the conversion treatment exhibited superior adhesion to polyamide-based adhesives compared with anodizing.
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Sugita et al. (2026) studied this question.
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