NEED HELP FOR YOUR NEXT PROJECT?
Please fill in the form below and our professionals will contact you within 12 hours! For a more prompt reply, you may reach us by phone call or WhatsApp: +86 136 9425 7500.
Why Die-casting Aluminum Difficult to Be Anodized?

Why Die-casting Aluminum Difficult to Be Anodized?

Why Die-casting Aluminum Difficult to Be Anodized?



Many customers will ask my product-aluminum die casting parts can be anodized? At present, die casting parts can be anodized, but is difficult. Silicone is an important element that affects the whole anodic oxidation. The content of silicone should not be more that 12%, because silicone is an inert element, while anodic oxidation relies on the chemical reaction between acid and aluminum alloy to generate oxide film on the surface. Cast aluminum alloys and die castings generally contain a high silicon content. The anodized film is dark. It is impossible to obtain a colorless and transparent oxide film. As the silicon content increases, the color of the anodized film changes from light gray to Dark gray to dark gray. it will react chemically with the anodization potion, and the product will be gray-black after anodizing. However, this does not affect its anti-corrosion features. Therefore, cast aluminum alloy can be anodized but is not suitable.


Also, EMP could provide several suggestions to optimize this issue as below:

1. Mold runner, gate design, mold temperature control

2. Use of raw materials to avoid pollution

3. Process control of die casting process to reduce marks and black watermarks

4. Pre-processing of rough parts


Related News
  • 7 Requirements of Die-Casting Aluminum Alloy Material

    7 Requirements of Die-Casting Aluminum Alloy Material

    Aluminum alloy die-casting products are mainly used in electronics, automobiles, motors, and some telecommunications industries. Some high-quality, high-precision, high-toughness, high-quality alumi...
  • A380 Die Cast Aluminum Properties

    A380 die-cast aluminum alloy is the most common special aluminum alloy because it combines easy casting mold, easy machining, good heat conduction, and other characteristics. Variable mobility, pres...
  • An Interesting Company Activity in EMP Company

    An Interesting Company Activity in EMP Company

    This week, EMP family organized a paintball for staff. Paintball was fun because we love working with our team to devise and implement a strategy that leads to victory. In paintball, we quickly learn...