For aluminum alloy die-cast parts, which require high levels of safety, stability, and durability, serving as structural supports, housings, or functional components, the quality of their surface coating directly impacts product performance and appearance.
During the forming process, aluminum alloy die-cast parts may exhibit issues such as porosity, shrinkage cavities, or uneven surface structure. Therefore, thorough pretreatment is essential before spraying or oxidation, including degreasing, cleaning, passivation, or sandblasting. The coating should possess excellent adhesion to prevent peeling or flaking during transportation, installation, or use. Common testing methods include cross-cut adhesion testing, impact testing, and abrasion testing.
