Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

On Friday 07 March 2003 05:44 am, milwiron@... wrote:

> Hi Adam,
> Thank you for the feedback. Thankfully the screws are common sizes,
> I probably replace them with Delrin or nylon versions.

Beware that nylon is attacked by HCl. I've had nylon zip ties fall
apart when used in a FeCl etch tank.

> At 02:07 PM 03/07/2003 +1100, you wrote:
> >Yes it will, but probably not fast as Ferric Chloride. I once had
> >a stainless teaspoon sitting in a beaker containing cupric
> >chloride etching and it etched a good part of it away over a few
> >days. When its long term you need good chemical resistant
> >materials. Are you close by to any titanium screw suppliers? :)
> >
> >You could try coating the screw and its surrounding with a
> >solvent based contact adhesive.
> >
> >milwiron@... wrote:
> >> Hey All,
> >> Does anybody know the effects of the cupric chloride etchant
> >> solution on stainless steel? I have a few stainless screws in
> >> my etching tank that ammonium persulfate doesn't touch but I
> >> know ferric chloride will slowly
>
> eat.
>
> >> Thanks,
> >> Denny
> >>
> >>
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--
Ned Konz
http://bike-nomad.com
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