How to turn waste into reusable materials

[Thirmo21]

Thanks Jim, I knew ferrous chloride was used to etch copper in circuit boards, but did not know about the air making it dissolve gold that easily, seems like the iron would displace the gold, easier than a copper would,I could understand a strong oxidizer, making it easier to attack gold,a good hot boil should remove any air, that is one way we pretreat our boiler water to remove oxygen, in a deareator to preheat water, the hot water cannot hold as much air, and oxygen attacks the iron in the boiler's.

Hello i want to ask if FeCl etch can really dissolve gold even without h202?
If its the case then wouldnt it be unsuitable for gold fingers and magnetic pins?
This post is pretty old, so just wanted to make sure.

 

[Yggdrasil]

Hello i want to ask if FeCl etch can really dissolve gold even without h202?
If its the case then wouldnt it be unsuitable for gold fingers and magnetic pins?
This post is pretty old, so just wanted to make sure.

Butcher will not reply since he passed away in November.

 

[Thirmo21]

Butcher will not reply since he passed away in November.

What a shame :f
My condolences.