circuit breaker contacts

[Harold_V]

Once the "nitric" is expelled, am i left with simply HCl?

Sigh! Damn, I'm getting good at saying stupid things.

I had HCl on my mind, and allowed that to cloud my thinking. Sorry, I was wrong, although not in principle. I have stated time and again that rinsing, alone, may not eliminate acids. I know the argument can be raised that it does, but when you process materials of this nature, you can rinse several times, then when you incinerate you still witness those brown fumes coming off as the material dries. The only 100% safe way I know of to eliminate acids is to incinerate---although a wash in a base would likely serve equally as well, assuming that was in your best interest.

And yes! SOMETHING began to dissolve the steel. :shock:

Shouldn't come as a surprise. There was likely still some base metal in solution, as well as traces of nitric. Both will dissolve steel. We're back to incineration.

most of the residue did dissolve readily in concentrated HCl.

8)

Harold

 

[dtectr]

Harold,

Did you have these contacts develope a layer of silver chloride on the surface and cause problems with the reaction? Or anything else that caused problems with contacts like these?[/quote]
And, Barren, where does this chloride come from?[/quote]

That is a good question and not even sure it was chloride. It is a large set of contact that I was running that have given me fit's. I am using home made nitric that was made with distilled water and let set in an ice bath over night in 30 degree weather and then filtered.

Chloride seems to be a possibility in homemade nitric? http://goldrefiningforum.com/phpBB3/viewtopic.php?f=34&t=8671#p81260

 

[Barren Realms 007]

Harold,

Did you have these contacts develope a layer of silver chloride on the surface and cause problems with the reaction? Or anything else that caused problems with contacts like these?
And, Barren, where does this chloride come from?

That is a good question and not even sure it was chloride. It is a large set of contact that I was running that have given me fit's. I am using home made nitric that was made with distilled water and let set in an ice bath over night in 30 degree weather and then filtered.

Chloride seems to be a possibility in homemade nitric? http://goldrefiningforum.com/phpBB3/viewtopic.php?f=34&t=8671#p81260

The nitric was made with distilled water and any water used in the process for diluting the nitric was distilled water.

 

[qst42know]

Barren.

I have had all the problems you seem to be having when using home made nitric on silver despite extended heating. I can't confirm with certainty if it was from chloride contamination in the sodium nitrate, residual sulfuric causing problems, or both to some degree. I suspect a bit of both.

Are you set up to distill your nitric acid?

 

[Barren Realms 007]

No I'm not. I make it by the forum standards acording to the recipe that has been posted and let it set over night in an ice bath and let the crystals form and then filter the solution. With the temps being low lately the solution has turned out very cold. Interesting on why it is hapening. I might just start buy nitric in the barrel if it continues to be a persistant problem. But for right now I don't do enough silver to justify it. My main concern was the contacts I am running being a pain in the *ss and just halting any dissolving once the film formed on them.

 

[lazersteve]

A little fine silver dust or silver nitrate crystals is enough to remove the chloride from most home made nitric solutions.

Steve

 

[Barren Realms 007]

Thanks for that info Steve. However I don't have either one of those because I don't do a lot of silver at this time. The silver I have is in the form of silver chloride from the solution I run.

What is nitirc? Must be a new chemical.

 

[DarkspARCS]

What is nitirc? Must be a new chemical.

It's used to speed up the process Barren... :twisted:

 

[Barren Realms 007]

What is nitirc? Must be a new chemical.

It's used to speed up the process Barren... :twisted:

It was a joke towards steves spelling.