So there you go!Stainless steel will passivate itself in the presence of oxygen
It will not do so if it's not bare metal: i.e some grease or other substance on the surface that will prevent the layer of chromium dioxide developing.
Hence the need to take the BrewBucket back to bare metal, recommended usage of Trisodium Phosphate to do this.
The use of acids is to remove any iron traces from welding or other industrial processes. Industrially they use nitric acid, but citric acid (and presumably phosphoric acid which is and active ingredient in Starsan) can also work.
hell yes avoid it, well, at least do not leave it sit too long.....still trying to hide the chlorine stains on my brand new brewery sink from the missus........takes that nice polish right off.manticle said:Chlorine on stainless? Usually avoided.
Yes BKF is awesome for cleaning up stainless. It is an oxalic acid product so remember to use your gloves!Milk-lizard84 said:Just a quick update to this thread. Found some bar keepers friend and gave the keg a quick once over last night. With little effort the reddish staining came off a treat. Still needs more elbow grease to finish the job bit this stuff looks like it'll do the job nicely.