Rusty keg lid

[nosco]

I decided to clean out an old racetrack keg thats been lying around for a while. Perc and a bit of costic. I got a bit (very) slack and left it soaking for 2 or 3 weeks. The inside of the lod rusted. I can get rid of the rust but im guessimg i should use this keg for beer again?

 

[Danscraftbeer]

I'd get a new lid. I'm no chem expert so adhere to (avoid mixing chems). Should you mix sod perc with costic?

 

[nosco]

On the kegking site it says caustic and perc make an effective cleaner. Ive

used it a fair few times without trouble. Can you even get new racetrack lids?

Strangely the 2nd lid had this rust mark on it. This is after some oxalic acid and a scrub.

 

[nosco]

Im wondering if the lids where upside down and the perc created an o2 pocket? I dont know how that would rust it but it might explain the weird mark on this lid.

 

[Matplat]

If it's stainless, once you clean the rust off the surface, the protective chromium oxide layer should reform and be good as new.

So, you just had a small pool of caustic/perc sitting inside the keg lid? With it open to the enviroment? Is it possible that something fell in died?

 

[Matplat]

Just re-read your last post, sounds like my theory is a bust... no idea, apart from the possibilty of that bit of metal not being stainless....