copperkid_18
Well-known member
I read in another post that you can only process non-magnetic pins in AP, Is this true? If so what is another easy process to use b/c all my pins are magnetic, thanks Copperkid
Magnetic Pins?
- Thread starter copperkid_18
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jimdoc
Well-known member
Are they slightly magnetic? if so it may just be the nickel layer under the gold.
Jim
Jim
copperkid_18
Well-known member
jimdoc said:
I used a harddrive magnet and they barely stuck, so it's probably nickel like you said, Thanks! will AP dissolve nickel?
Barren Realms 007
In Remembrance
Put them in the AP and process them.
copperkid_18
Well-known member
Barren Realms 007 said:
Thanks!
copperkid_18
Well-known member
copperkid_18
Well-known member
Barren Realms 007
In Remembrance
How much of what did you put in there?
Did you measure what you put in there or just eye ball it?
Did you measure what you put in there or just eye ball it?
copperkid_18
Well-known member
Barren Realms 007 said:
a 1 1/2 cups of hcl to 3/4 cups of peroxide
Have you read the copper chloride etchant document on my website?
It explains the colors and chemistry behind the AP reaction.
Steve
It explains the colors and chemistry behind the AP reaction.
Steve
copperkid_18
Well-known member
lazersteve said:
No, I have not but will have to soon. Thanks
Barren Realms 007
In Remembrance
copperkid_18 said:
Paitence then and let your solution work. And go to Steves site and read what his recomendation is.
And do not put that dish on a hot plate.
copperkid_18
Well-known member
Barren Realms 007 said:
i went to steves site, but what is the doc. called?
Barren Realms 007
In Remembrance
copperkid_18 said:
CuCl2 as an Etchant
copperkid_18
Well-known member
Ok, i looked at the pics on the page and it's saying that it is saturated?!?
Barren Realms 007
In Remembrance
Just be paitent and let your stuff work. You get in a rush and you are going to mess up by adding something that you don't need to add.
patnor1011
Well-known member
AP on pins might take weeks rather than days. I had mine in about 15 days. I agitated solution once twice a day. At the end I was left with black coloured AP and nice gold foils. Patience.
I haven't had time to read the forum as thoroughly as I typically do lately, so this is a bit late.
Looking at your pictures you used too much H2O2 and have put a fair amount of gold into solution. Not the end of the world, but it means that as your reaction continues the gold will be cemented on the base metals as a fine black powder, at least as long as you do not keep overdosing it with oxidizers.
I am a fan of slow and steady for this reaction and only use bubbled air as my oxidizer. This saves you the cost of H2O2 and does not dilute your HCl. The lower oxidizing potential also allows the acid to preferentially attack the base metals giving you a higher percentage of your gold as foils instead of as finely divided black cement gold.
Looking at your pictures you used too much H2O2 and have put a fair amount of gold into solution. Not the end of the world, but it means that as your reaction continues the gold will be cemented on the base metals as a fine black powder, at least as long as you do not keep overdosing it with oxidizers.
I am a fan of slow and steady for this reaction and only use bubbled air as my oxidizer. This saves you the cost of H2O2 and does not dilute your HCl. The lower oxidizing potential also allows the acid to preferentially attack the base metals giving you a higher percentage of your gold as foils instead of as finely divided black cement gold.
I can't agree more with patnor1011 on this one as to patience being the key with AP, if you are in a greater rush this is the wrong way to process your materials. It is for this reason I do not even use H2O2 in the beginning. Even with just a bubbler you need to stop adding air in a timely manner as HCl with air will put gold, palladium, and platinum into solution once the base metals are in solution.
