Copper welds turning green...

[aekdbbop]

Any problem with my copper welding job turning green after my second boil? looks like it may have just tarnished..

 

[Orfy]

I presume you mean the soldered joints?

I find the acid wort cleans them nicely then I rinse with water.
I've never had any patina

http://www.ci.tucson.az.us/arthazards/metal2.html

 

[eddie]

I've read that the green verdigris that forms on copper is poisonous and should never come into contact with wort or anything else that you intend to consume. At the very least, I'd scrub it off.

 

[aekdbbop]

well.. it could have been after my keg had oxyclean in it for two days after a brew.. youre kinda freakin me out about poison though


and yeah i meant the soldered joints

 

[Vermicous]

You have to ingest a lot of verdigris to be affected. It's like the cyanide in apples, I wouldn't worry about it.

 

[kladue]

The green is from the zinc chloride in the solder flux corroding the copper to copper chloride. Most of the soldering fluxes are petroleum base with zinc chloride as the cleaning agent, need to use a soap or solvent to break down the petroleum base residue and clean the zinc chloride "acid" off the joint. Wash it up then polish with scotch brite and that should be the end of your problems.

 

[aekdbbop]

sounds good.. Ill do that..

 

[david_42]

Clean it well. Regardless of the possible problem with ingesting it, verdigris will end up in your wort and make for weird flavors.

 

[Rickochet]

Clean it well. Regardless of the possible problem with ingesting it, verdigris will end up in your wort and make for weird flavors.

VERDIGRIS GREEN ALE....Sounds like a smooth drinker to me!

 

[Spartan1979]

VERDIGRIS GREEN ALE....Sounds like a smooth drinker to me!

Took you six years to come up with that?

 

[Rickochet]

Took you six years to come up with that?

Slow to speak... slow to anger.... that's biblical ain't it? :cross: