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Old 04-21-2008, 03:23 AM   #1
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Default metallic taste

Apparantly my stout has a metallic taste. At least thats what the judges from the competition I entered it in said. They said it might have been infected. The only thing I found about metallic taste was caused by the pot during boil but I have a stainless pot with no scratches or anything so I dont think that was the issue. Has anyone else had a mettallic taste in their beer or any suggestions on how to prevent it again? Besides sanitize everything.

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Old 04-21-2008, 03:26 AM   #2
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Quote:
Originally Posted by clemson55
Apparantly my stout has a metallic taste. At least thats what the judges from the competition I entered it in said. They said it might have been infected. The only thing I found about metallic taste was caused by the pot during boil but I have a stainless pot with no scratches or anything so I dont think that was the issue. Has anyone else had a mettallic taste in their beer or any suggestions on how to prevent it again? Besides sanitize everything.
Is it the same stout you sent on the Swap?
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Old 04-21-2008, 03:27 AM   #3
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Quote:
Originally Posted by clemson55
Apparantly my stout has a metallic taste. At least thats what the judges from the competition I entered it in said. They said it might have been infected. The only thing I found about metallic taste was caused by the pot during boil but I have a stainless pot with no scratches or anything so I dont think that was the issue. Has anyone else had a mettallic taste in their beer or any suggestions on how to prevent it again? Besides sanitize everything.
According to "How to Brew"

Metallic
Metallic flavors are usually caused by unprotected metals dissolving into the wort but can also be caused by the hydrolysis of lipids in poorly stored malts. Iron and aluminum can cause metallic flavors leaching into the wort during the boil. The small amount could be considered to be nutritional if it weren't for the bad taste. Nicks and cracks ceramic coated steel pots are a common cause as are high iron levels in well water. Stainless steel pots will not contribute any metallic flavors. Aluminum pots usually won't cause metallic flavors unless the brewing water is alkaline with a pH level greater than 9. Shiny new aluminum pots will sometimes turn black when boiling water due to chlorine and carbonates in the water.

The protective (grayish) oxides of aluminum can be enhanced by heating the clean pot in a dry oven at 250°F for about 6 hours.


It states that stainless steel won't give off these flavors, so I'm really not sure what the problem might be.
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Old 04-21-2008, 04:38 AM   #4
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Metallic off flavours are hard to pin down. They sometimes pop up for no rhyme or reason, and then disappear again for a while. Even Jamil Zainasheff has mentioned he has encountered them and can't explain them.

A good friend of mine had it happen to him a couple of times. He suspected that it was the hops he was using (sorry -- I can't remember what they were, except that they hadn't been stored very well). Others link it to oxidation of wort compounds. Off flavours from a brew pot are also a commonly cited source of metallic flavours, but it doesn't sound like this is the case in your situation.

If you do figure out the cause, please post back and let us know.

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Old 04-21-2008, 06:11 AM   #5
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I am convinced that most metallic flavors are a combination of roasty flavors and oxidation. At least with me, whenever I have gotten a metallic flavor, it has been in roasty beers (stouts/porters) and I had reason to believe they may have been oxidized, particularly when I bottle from my cobra taps.

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Old 04-21-2008, 06:52 AM   #6
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Was your extract from a metal can? Pineapple from a metal can tastes metallic as opposed to fresh pineapple. Avoid malt extract in metal cans if possible.

Forrest

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Old 04-21-2008, 01:40 PM   #7
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It is the same stout I sent for the swap granted it has been a couple extra weeks since you drank it.

The LME was from those plastic jugs and the PB came from a jar.

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Old 04-21-2008, 01:56 PM   #8
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It also could just be your water. Some water supplies have a high iron content.


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Old 04-21-2008, 02:31 PM   #9
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My water tastes just fine straight from the tap but I filter it before brewing with it just to be sure.

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Old 04-21-2008, 02:35 PM   #10
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What about the bottle caps? When you washed them they did not rust or anything right>?

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