[volt-nuts] Source for spade lugs?

[Alan Scrimgeour]

"25% sulfuric acid plus 8 oz./gal copper sulfate," sounds like the one I 
used, but my memory is it has to be hot too.

Alan


----- Original Message ----- 
From: "Rob Klein" <rob.klein at smalldesign.nl>
To: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
Sent: Saturday, September 11, 2010 8:08 PM
Subject: Re: [volt-nuts] Source for spade lugs?


>  Just found this:
> http://www.finishing.com/319/63.shtml
>
>
> -Rob
>
> Op 11-9-2010 17:20, Alan Scrimgeour schreef:
>> Yes, I tried a mix for chemically stripping tin and lead from copper. I 
>> think it also removed the inter-metallic layer between them, which is 
>> important, judging by the bright copper colour, but that's a guess. I 
>> can't find the details now, but if you Google enough you'll probably find 
>> the details at a site specialising in advising members of the metal 
>> plating industry. I think it was a mixture of water, copper sulphate and 
>> sulphuric acid (which I had to hand) and used at about 80C. There were 
>> some other formulations but they sounded more complex or expensive and 
>> commercial products are available if cost is no object. I haven't checked 
>> the result for thermally generated voltage against the same lugs with the 
>> plating thoroughly sanded off, but they looked the right colour.
>>
>> Alan
>>
>>
>>
>> ----- Original Message ----- From: "Rob Klein" <rob.klein at smalldesign.nl>
>> To: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
>> Sent: Saturday, September 11, 2010 2:23 PM
>> Subject: Re: [volt-nuts] Source for spade lugs?
>>
>>
>>>  Op 4-9-2010 23:48, J. Forster schreef:
>>>> Another option would be an electrical supply house, then chemically 
>>>> strip
>>>> the plating.
>>>>
>>>> -John
>>>>
>>>> ==============
>>> In an exchange of PM's, fellow Volt-Nut Alan Scrimgeour showed me how he 
>>> had successfully
>>> done just that. As far as I've looked, almost all commercially available 
>>> crimp terminals are
>>> tin plated pure copper, although there are a few brass ones about too.
>>>
>>>
>>> - Rob
>>>
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>>
>>
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>
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