How to improve the adhesion during electroplating of aluminum alloy die-cast parts?
Precautions Before Electroplating Zinc Alloy Die-Cast Parts
Electroplating is a key process in ensuring the quality of zinc alloy die-cast parts. Therefore, zinc alloy die casting manufacturers must pay special attention to details during electroplating to ensure that the final products meet high-quality standards.
So, what should be noted when electroplating zinc alloy die-cast parts?
1. Understand the Structural Characteristics of Zinc Alloy Die-Cast Parts
The surface of zinc alloy die-cast parts has a smooth and dense metallic layer, while the layer beneath is relatively porous and loose. During polishing, it is essential not to break through the dense surface layer, as this may cause issues such as blistering or peeling of the electroplated layer.
2. Be Aware of the Chemical Properties of Zinc Alloys
During degreasing or etching, avoid using strong acids or strong alkalis, as these can lead to blistering or peeling during the electroplating process. Harsh chemicals damage the substrate and reduce plating success rates.
3. Minimize Delay Between Pre-treatment and Electroplating
After removing oil and oxide films from the surface, components should be immediately placed into the electroplating bath. Delays can allow new oxide films or hydrates to form, which weakens the adhesion of the electroplated layer.
Since electroplating is one of the most common surface treatments for zinc alloy die-cast parts, thorough preparation before plating is essential. Doing so not only improves the yield of high-quality plated parts but also enhances the appearance and perceived value of the final product, making it more premium and attractive.