zzyvba
Active Member
- Joined
- Jul 4, 2008
- Messages
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Hi,
I cleaned my keg 3 weeks ago, and filled it with water to rinse. It was late and I was tired, so left the keg full of water and opened. However, I noticed there was rust inside the thread where the gas tube fit in the next two days.
here is a picture:
a closer one:
I read about the same issue here and thought my keg needed a passivation layer. so I cleaned it very well with green fiber scour pad and a stainless steel cleanser, rinsed and dried (it was clean and shiny) and exposed to air for two days.
Then, I filled it with water again to see if it was going to rust. and it did rust again.
the question is:
What am I doing wrong?
the water is tap water (hard and a little bit salty).
Does stainless steel rust even if it is passivated?
is hard water corrosive if it is exposed to air?
I cleaned my keg 3 weeks ago, and filled it with water to rinse. It was late and I was tired, so left the keg full of water and opened. However, I noticed there was rust inside the thread where the gas tube fit in the next two days.
here is a picture:

a closer one:

I read about the same issue here and thought my keg needed a passivation layer. so I cleaned it very well with green fiber scour pad and a stainless steel cleanser, rinsed and dried (it was clean and shiny) and exposed to air for two days.
Then, I filled it with water again to see if it was going to rust. and it did rust again.
the question is:
What am I doing wrong?
the water is tap water (hard and a little bit salty).
Does stainless steel rust even if it is passivated?
is hard water corrosive if it is exposed to air?