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Hardcoat Anodize Surface Energy

I am trying to bond a hardcoat anodized aluminum part with a PC/ABS part and would like to know what the surface energy of hardcoat anodizing is. My guess is that it is a low surface energy finish but I'm not sure how low. I'd like to use an adhesive tape.

Justin Sheard
- Plymouth, MN, USA
2002

The surface energy of clean aluminum oxide is fairly low but varies considerably with impurities & chemicals adsorbed (note: adsorbed, not absorbed) on the surface. Clean and dry 6063 aluminum has a surface energy of about 90 dynes/cm2 and clean & dry polished aluminum oxide can be in the 20-30 range in dynes/cm2. As we all know, the surface energy figures vary from source to source & are dependent on temperatire & testing conditions--in other words, your mileage may vary.

Your best bet would be to test your product with a droplet procedure which measures contact angle.

Dale Woika
Surface Conversion Sciences - Bellefonte, Pennsylvania
2002

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