JEM Australia
Well-Known Member
Thought I'd try fermenting in stainless steel, instead of plastic for a change, to see if there is any difference in flavour. I decided to use my mashing pot as a fermenter. It is a large stainless steel pot and I have a 3/8 ball valve in the bottom. I use a galvanised steel washer on the backing nut inside the pot, to make sure the nylon washer is compressed properly for sealing.
Stupid stupid me.
I set up galvanic corrosion between the washer, the brass valve and stainless pot. Some of the zinc on the washer corroded away during the course of the ferment. The beer developed a really bad metallic taste.
Don't repeat my mistake, stick to stainless and brass components. I never had problems before because mashing is a relatively short process, but fermenting isn't.
Stupid stupid me.
I set up galvanic corrosion between the washer, the brass valve and stainless pot. Some of the zinc on the washer corroded away during the course of the ferment. The beer developed a really bad metallic taste.
Don't repeat my mistake, stick to stainless and brass components. I never had problems before because mashing is a relatively short process, but fermenting isn't.