Enhancement of magnesium-composite bond-interface by a simple combined abrasion and coating method

Obtaining a strong bond when adhering magnesium alloys to other materials, especially to fiber-reinforced polymer composites, is challenging. Regardless of the strength of the adhesive used, it is the surface preparation that also significantly affects the overall bond strength and long-term performance of the mated surfaces. While optimal and established surface preparations are available for aluminum, steel alloys and polymer composites, the current method proposed for magnesium alloys is extremely onerous, time-consuming, and very expensive. The aim of the research disclosed in this paper has been to develop a relatively simple, effective and economical procedure for enhancing the bond strength between magnesium alloy to fiber-reinforced polymer composites, which had been proven to be a challenging issue. The proposed method facilitates a superior interface-bond using a relatively low-cost epoxy resin. Enhanced Mode I fracture toughness and delamination resistance are obtained. Both static and impact tests are used to assess the effectiveness of the proposed procedure.