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-   -   2nd Batch has bad oxidation/cardboard taste (http://www.homebrewtalk.com/f39/2nd-batch-has-bad-oxidation-cardboard-taste-156860/)

triangulum33 01-13-2010 06:59 PM

2nd Batch has bad oxidation/cardboard taste
 
Brewed a cream ale from AHB. Full boil in a new aluminum pot. Pot carefully cooled in <30min in a big tub w/snow. 3wks in carboy, room temp in the dark. 2 wks bottle condition.

Bad bad cardboard taste. Almost undrinkable.
I've read all over this forum and Palmer on oxidation, and cant see where it would've happened. This flavor wont go away with more time in the bottle, right?

My concern is that it will happen again.

cheezydemon3 01-13-2010 07:02 PM

My guess would be bubbles at bottling.

Bubbles any time after primary fermentation begins are bad. Splashing during transfer, etc.

It seems early to have such bad oxidation evident. Is it still green?

triangulum33 01-13-2010 07:04 PM

I was very careful racking to the bottling bucket. No real bubbling.

It tasted like cardboard and a little metallic when I bottled it.

maida7 01-13-2010 07:10 PM

your at risk to oxidize the beer after the alcohol is produced. Did you rack to a secondary? Did your siphon pull air into the beer? Was there foamy air bubbles after racking? How about when you bottled?

I'm not at all sure on this but the new aluminum when bright and shiny will oxidize and become grey or even black. Maybe this had an effect. That's a long shot.

maida7 01-13-2010 07:12 PM

this quote is taken from John Palmers How To Brew

"Do not clean aluminum shiny bright or use bleach to clean an aluminum brewpot because this removes the protective oxides and can result in a metallic taste. This taste-detectable level of aluminum is not hazardous. There is more aluminum in a common antacid tablet than would be present in a batch of beer made in an aluminum pot."

A brand new pot could react similar to a super clean pot.

triangulum33 01-13-2010 07:46 PM

The pot is the only difference in the brew compared to others.

But, if a new Al pot imparts flavors that are this bad, I would think people would be screaming about it all the time.

maida7 01-13-2010 07:57 PM

Quote:

Originally Posted by triangulum33 (Post 1807234)
The pot is the only difference in the brew compared to others.

But, if a new Al pot imparts flavors that are this bad, I would think people would be screaming about it all the time.

Well what do you want to hear? If it's not the pot then maybe you F'd up and oxidized everything when you racked the beer.

Perhaps your pot was just extra shiny and clean. I said it was a long shot.

triangulum33 01-13-2010 08:11 PM

Quote:

Originally Posted by maida7 (Post 1807264)
Well what do you want to hear? If it's not the pot then maybe you F'd up and oxidized everything when you racked the beer.

Perhaps your pot was just extra shiny and clean. I said it was a long shot.

I'm not arguing with you dude. Just trying to figure this out.

artbrewer 01-13-2010 11:17 PM

you have to condition the aluminum brewpot before you use it for wort,
boil some water in it for 15-20 min.
this will eliminate any weird taste

Wellshooter 01-13-2010 11:30 PM

My aluminum pot was obviously stamped from sheet aluminum. To do that they use a lubricant. The pot felt oily to the touch. First thing I did was wash with hot water and soap, then boil water for an hour. The boil turned the inside of the pot a dark gray (oxidation I suppose). Then and only then did I use it for a BK.

Not an answer I suppose, but maybe food for thought.


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