Black anti-static foam corrosion

[drlegendre .]

Interesting find, thanks for posting this. I've seen this as well. with a
batch of old ICs which had been stored (in black foam) for some 20-30
years. The leads kind of just stayed behind in the foam..

My assumption was that the foam was simply hygroscopic, and held enough
atmospheric moisture & pollutants to foster corrosion.

On Sat, Dec 3, 2016 at 9:06 AM, Al Kossow <aek at bitsavers.org> wrote:

>
> I was curious what the compound is that corrodes IC leads in old black
> anti-static foam
>
> adipic acid
>
> https://www.febo.com/pipermail/time-nuts/2008-July/032531.html
>
> and google for polyurethane and adipic acid
>
> https://www.jstor.org/stable/20619421
> Corrosion on Metallic Tokens Stored in Polyurethane Foam
>
>
>