Letter 11431

Teflon Coating Aluminum 

We have a customer that has experienced better corrosion resistance on Teflon coated, anodized aluminum than with non-teflon coated. Can Teflon coating be applied to Type II anodize or only Type III? Does the teflon coating actually ADD protection? Is there a salt spray rating on teflon coating as compared to plain anodize?

David Lair
- Phoenix

It does impart added protection if you have observed this. Why don't you get some standard aluminum panels, and do a small experiment yourself?

There doesn't seem to be any reason why an additional coating on a surface wouldn't improve protection, but you need to define the corrosive atmosphere and test it. It may improve the protection in one condition and not in another.

Tom Pullizzi Platronica.com Falls Township, PA

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