0

Teflon Etch Tank
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Teflon Etch Tank

by mbodo on Fri Mar 22, 2013 7:26 pm

Not sure if this is the best forum group for this. Can teflon coated tanks be used for PCB etch with Ferric Chloride?

mbodo
 
Posts: 7
Joined: Fri Apr 20, 2012 12:13 pm

Re: Teflon Etch Tank

by john444 on Fri Mar 22, 2013 11:54 pm

Hi Mbodo,

The teflon will be fine in ferric-chloride.
But, you cannot count on any coating to be perfect.
Any pin-hole or other imperfection will allow the ferric-chloride to penetrate.
If the base material is any of the vast majority of metals,
you will have corrosion under the teflon coating.

Don't use a teflon coated skillet with ferric-chloride!
It will ruin the skillet and the ferric-chloride will not be usable for etching copper.

Glass, silicone, polyethylene, polypropylene, PVC are the appropriate
materials for using & storing ferric-chloride.
Photography developing / processing trays are great because they have a
pouring spout in one corner.
Otherwise, almost any plastic or glass tray will do.

Good Luck, John

john444
 
Posts: 443
Joined: Sun Mar 04, 2012 2:42 pm
Location: Claremore, Ok

Re: Teflon Etch Tank

by adafruit_support_mike on Sat Mar 23, 2013 1:26 am

As a side note, Teflon has been outrageously expensive for the past couple of years.

For this application, polyethylene (low density or high density) will do everything Teflon can at a fraction of the cost.
When you void a product warranty, you give up your right to sue the manufacturer if something goes wrong and accept full responsibility for whatever happens next. And then you truly own the product.

adafruit_support_mike
 
Posts: 53579
Joined: Thu Feb 11, 2010 2:51 pm

Please be positive and constructive with your questions and comments.