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-----Etching aluminum foil for painting while avoiding embrittlement
I'm trying to etch aluminum foil prior to painting for an electronics application. So far, I've had decent success with a two-step process consisting of degreasing and nucleating etch pits using an NaOH solution at room temperature, followed by rinsing and then etching with an HCl solution at elevated temperatures (60-80 °C). This seems to work very well for adhering paint, but the resulting etched foil becomes very brittle and hard to work with. Are there any additives or alternate etching steps I could try to avoid causing embrittlement?
The paint has to be conductive, so I don't think any sort of anodization would work here.
Engineer - King of Prussia, Pennsylvania
October 1, 2009
October 8, 2009
Larry
Have you considered a chemical film IAW
MIL-DTL-5541
[⇦ this spec on DLA] ?
- Colorado Springs Colorado
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