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Nickel Corrosion? Kill Coil copper coloured - Page 6

post #51 of 56
First 2 sites I looked at...
Quote:
Silver is not very reactive in the pure form, and does not tarnish under normal circumstances. The copper in the sterling silver, however, does tarnish. This appearance is unfortunately not confined to the 7% of your jewelry that is made up of copper, but will cover the entire piece.
http://www.silverjewelrycleaning.com/silver_tarnish.htm
Quote:
Like gold, silver in its pure form is too soft to use in jewelry so other metals are added to it to create sterling silver, which is at least 92.5% silver. Those other metals, primarily copper, are the reason sterling silver tarnishes. The copper reacts to the moisture and sulphur in the air — first the sterling silver gets a golden cast and then it turns dark. Acidic foods such as onions can also cause sterling silver to tarnish.

The tarnishing process is much quicker in an area with pollution in the air and water nearby causing a humid atmosphere. Keeping sterling silver in a dry airless environment, such as an airtight plastic bag, will help slow down the chemical process that results in tarnish.

Fine silver” is 99.9% silver. Since there is very little copper in the alloy, fine silver tarnishes much more slowly than sterling silver. It's also very soft so it's used mostly for chains and bezels to hold stones in place. In general, the higher the silver content, the slower the tarnishing. Even fine silver, though, will eventually tarnish. Again, proper storage will help slow down the tarnishing process.
http://www.colorspark.com/silver-care.html

And I did not say silver does not tarnish, silver sulfide is black, and forms much less frequently than cuprous oxide which is red.
Edited by opt33 - 6/18/11 at 10:28pm
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post #52 of 56
You said 99.9% silver which is pure silver... tarnishes red from copper which would lead me to ask how'd you know this? It can't be pure 99.9% then can it?

There are sulphates in the air from pollution. There are sulphates emitted from products in contact with the silver, or a variety of other ways. There are orders of sulphates higher due to the use of nukecu. Seems kinda connected to me?
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post #53 of 56
Quote:
Originally Posted by tsm106;13883593 
Silver doesn't rust, it tarnishes but iirc silver tarnish is bluish. Now, it could be that his coil isn't silver and is instead plated copper... hmm?

I beleive you are correct about this. That is definately looks like rust. But silver does not rust.

op: where did you purchase your kill coil? I have to ask.
Edited by AliceInChains - 6/18/11 at 11:28pm
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post #54 of 56
Quote:
Originally Posted by NaeKuh;13922725 
*shrug*

thats why i cant tell people exactly whats going on.

tongue.gif

But as i said... back in the days, no one heard of anything like this happening. Its a new occurrence which to me sounds like something was changed.

Give it time... it will be found out... and it will never be repeated again without dire consequences.

What has besides shady vendors and a ton of noobs making mistakes? I thought about going custom, instead of rolling the dice and praying that my copper block is in fact copper.
post #55 of 56
Thread Starter 
I'm not going to say where I bought the kill coil as the same make is available from all the mainstream UK suppliers and I'm not prepared to point the finger at one who has served me well in the past.

I removed the Phobya black nickel res from my other loop (this wasn't in the loop with the copper on the kill coil problem) to inspect the internals and decided to give it a polish as it had built up a patina of fingerprints and water streaks. It was quite surprising that a light rub with 'Autosol' took off the 'nickel' finish leaving a copper colour base below. I know Autosol is a bit more abrasive than brasso but isn't nickel supposed to be a bit more resilient than that?
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post #56 of 56
Quote:
Originally Posted by tsm106;13924602 
You said 99.9% silver which is pure silver... tarnishes red from copper which would lead me to ask how'd you know this? It can't be pure 99.9% then can it?

There are sulphates in the air from pollution. There are sulphates emitted from products in contact with the silver, or a variety of other ways. There are orders of sulphates higher due to the use of nukecu. Seems kinda connected to me?

99.9% fine silver isnt pure silver, or it would be 100%. Mayems said uses 99.999% silver because he stated he had seen issues from contaminants in 99.9% silver, on Xtreme thread of same. See pic below of even 99.99% silver with analyses, the main contaminant is copper at .001, 99.9% typically has much more copper.

@AliceInChains, some of the info was posted on Xtreme, what some thought as well about not being silver coil, but he already cut the end of the kill coil off a while back, at least appears silver all the way through. But you have a good point, we are kind of at the mercy of those selling things to provide what we bought...not way to be sure of what possible contaminants/substance aside from testing.

Bottom line for me it looks like cuprous oxide, ie red, and copper-silver corrosion looks like red rust.

Could be something in his loop with copper/brass res, or contaminants in silver, or maybe PT nuke, but if sulphates turning the silver, should be yellow, golden or usually black. Not to mention all the people who use PT nuke and silver coils. So makes me think either res issue or contaminant in silver coil issue.

Not that any of this pontificating is going to get us anywhere, only lab analysis would tell us what the issue is.
Edited by opt33 - 6/19/11 at 6:34am
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