Trivalent conversion coating on aluminum

In summary, a trivalent conversion coating is a type of surface treatment applied to aluminum to improve corrosion resistance and paint adhesion. It works by creating a thin layer of metal oxide through a chemical reaction. The main benefits include improved corrosion resistance, increased paint adhesion, and environmental friendliness. It can be applied through immersion, spray, or brush methods. Trivalent conversion coatings are considered safe for both the environment and human health, making them a preferred choice in various industries.
  • #1
roadrunner1994
11
2
Hi!
Is anyone familiar with trivalent conversion coating on aluminum? I'm struggling with unrepeatable and too high values of contact electrical resistance of coating. I would really appreciate any advice how to deal with that coating.
Thanks a lot!
 
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1. What is trivalent conversion coating on aluminum?

Trivalent conversion coating on aluminum is a surface treatment process that involves coating aluminum with a thin layer of trivalent chromium compounds. This coating provides corrosion resistance and improves the adhesion of paints and other coatings on aluminum surfaces.

2. How is trivalent conversion coating applied to aluminum?

Trivalent conversion coating is typically applied through a chemical bath process, where the aluminum is immersed in a solution containing trivalent chromium compounds. The coating is formed through a chemical reaction between the solution and the aluminum surface.

3. What are the benefits of using trivalent conversion coating on aluminum?

Trivalent conversion coating offers several benefits for aluminum surfaces, including improved corrosion resistance, increased paint adhesion, and enhanced surface appearance. It is also a more environmentally friendly alternative to hexavalent chromium coatings.

4. Is trivalent conversion coating suitable for all types of aluminum?

Trivalent conversion coating is suitable for most types of aluminum, including pure aluminum, aluminum alloys, and anodized aluminum. However, it may not be suitable for certain types of aluminum, such as those with high copper content.

5. How long does trivalent conversion coating last on aluminum?

The longevity of trivalent conversion coating on aluminum depends on various factors, such as the thickness of the coating, the type of aluminum, and the environmental conditions. In general, it can provide corrosion protection for several years, but it may require periodic maintenance to ensure its effectiveness.

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