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HP Forum Archive 20

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Corrosion ... best way to remove?
Message #1 Posted by gene wright on 19 Oct 2011, 10:43 a.m.

I have vinegar, alcohol and water.

Suggestions? Geoff's book suggests soak in white vinegar first, then alcohol then rinse in water.

?

      
Re: Corrosion ... best way to remove?
Message #2 Posted by geoff quickfall on 19 Oct 2011, 1:44 p.m.,
in response to message #1 by gene wright

youve got mail.

Remove the label first. then photo copy it, clean up the photocopy and photocopy the result. Thats if you are OCD.

Cheers, Geoff

            
Re: Corrosion ... best way to remove?
Message #3 Posted by gene wright on 19 Oct 2011, 5:18 p.m.,
in response to message #2 by geoff quickfall

The real question is why is this huge thing hanging on the ceiling above my head and how I will get enough vinegar up there to clean it up.

                  
Re: Corrosion ... best way to remove?
Message #4 Posted by geoff quickfall on 20 Oct 2011, 8:40 p.m.,
in response to message #3 by gene wright

HEH HEH HEH!

            
Re: Corrosion ... best way to remove?
Message #5 Posted by uhmgawa on 19 Oct 2011, 7:48 p.m.,
in response to message #2 by geoff quickfall

Quote:
Remove the label first. then photo copy it, clean up the photocopy and photocopy the result. Thats if you are OCD.

It is also possible to remove/desolder the terminal contacts, clean the corrosion by sandblasting (vibratory/rotary tumbler should work, haven't tried) and re-plate the nickel surface. Once the plating barrier is gone the base metal (phosphor bronze, steel, etc..) is subject to substantial oxidation. Even tinning via solder is better than leaving the base metal exposed IMHO as the oxide scrubs off more readily during cell insertion.

      
Re: Corrosion ... best way to remove?
Message #6 Posted by Kerem Kapkin (Silicon Valley, CA) on 19 Oct 2011, 2:01 p.m.,
in response to message #1 by gene wright

Gene:

You can use this mixture to resolve which is mostly Copper Oxide: 1/4 cup white vinegar (dilute acetic acid) 1 teaspoon salt (NaCl)

If you have any left over solution, put your old pennies in there, they will come out shiny clean too :)

-Kerem

            
Re: Corrosion ... best way to remove?
Message #7 Posted by Ethan Conner on 19 Oct 2011, 4:23 p.m.,
in response to message #6 by Kerem Kapkin (Silicon Valley, CA)

There is also a product called evaporust that works pretty good. Also check the brownell's website i think they have something also.


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