Some little problems on Memory Ram Yields

[mls26cwru]

I had a thought... did you test the leech after the nitric only step? You mentioned that you "dipped the boards in NaOH"... im wondering if maybe some HCl was trapped in the board fibers/through holes and may have made it past the "neutralization" step. It wouldn't take much at all to dissolve 0.3g.

Just a thought.

 

[kjavanb123]

I had a thought... did you test the leech after the nitric only step? You mentioned that you "dipped the boards in NaOH"... im wondering if maybe some HCl was trapped in the board fibers/through holes and may have made it past the "neutralization" step. It wouldn't take much at all to dissolve 0.3g.

Just a thought.

Yes nitric solution was checked few times with stannous and turned out negative for gold.

 

[g_axelsson]

You replied to a post from 2014, in which is described a process of leaching RAM fingers in HNO3 and H2O2? Which process is that?
AP misunderstood perhaps? Try not to copy questionable and old info.

Without reading the other thread, adding H₂O₂ to nitric acid oxidizes the nitric oxide gases and turns it back into nitric acid. It decreases the red NOx cloud and makes your nitric acid last longer.

Göran

 

[swaminair]

Nuance What is AP term in chemistry. AR refers to Aqua Regia. can any one help me sort out?

 

[FrugalRefiner]

For terms you don't recognize, see A Glossary of Common Terms.

Dave

 

[cejohnsonsr1]

Acid Peroxide.