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Home Brew Forums > Home Brewing Beer > DIY Projects > Kettles, Mash Tuns, & Hot Liquor Tanks > keggle rust problem
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Old 04-15-2011, 05:06 PM   #1
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Default keggle rust problem

i got two kegs sent them out to get cut with plasma cutter and when i got them back the inside is covered with rust it looks like. and its kind hard to take off. is it becuase of plasma cutter? or is it just surface rust that will easily come off? does this usually hppen with keggles? What is best way to clean and prevent?

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Old 04-15-2011, 05:43 PM   #2
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stainless steel wont rust, but when you melt it with a plasma torch it turns into small liquid metal beads which oxidize in open air and change their chemical properties and then do rust.

you just have to scrub, sand or chiesel all the slag off before you use them. this is why people prefer using a grinder- no metal slag left behind.

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Old 04-15-2011, 05:46 PM   #3
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Long hot soak with Oxyclean. Maybe scrub with a Scotchbrite pad.

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Old 04-15-2011, 05:56 PM   #4
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you need to re-passivate the stainless after disturbing the oxide coating. http://www.mmsonline.com/articles/ho...ss-steel-parts

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Old 04-15-2011, 06:23 PM   #5
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I had the same issue and learn from my mistakes... do not use anything to clean the inside that is metal!!! I used a wire brush to remove the slag! BAD IDEA!

In retrospect it embedded small particles of the brush in the SS as it cleaned and left more metal to oxidize and rust... Use coarse scotch brite pads on a air angle grinder. If that doesn't do it use sand paper but only if you have too (you shouldn't). Once all the slag is cleaned then progress to finer scotch brite pads and you'll have a pretty nice finish.

Finally, get some barkeepers friend and mix it up into a thick paste. I then scrubbed it in using a fine scotch brite. I let is sit over night to give the Oxalic Acid time to re-passivate the SS. Then rinse well and wipe with a wash cloth until it's all gone. Then rinse one more time for good measure!

I haven't had any rusting in my keggles since I did this! It is time consuming and a PITA but it's better than wasting good keggles!

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Old 04-15-2011, 06:39 PM   #6
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dammit!! i thought plasma cutter was the way to go oh well ive and learn i guess thanks for all the help. Where do i get BKF?? and do some scotch brites have cleaning agents in them? if so should i stay away from them and use plain ones?

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Old 04-15-2011, 06:43 PM   #7
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You need to put enough water in the keg to cover the bottom before cutting with a plasma cutter, this keeps the slag from sticking to the bottom...

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Old 04-15-2011, 06:45 PM   #8
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Quote:
Originally Posted by MrStrangeBrew View Post
Where do i get BKF?? and do some scotch brites have cleaning agents in them? if so should i stay away from them and use plain ones?
should be right near the bon ami and comet in your grocery store. As for the scrubies I strictly stick to plain green one
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Old 04-15-2011, 06:46 PM   #9
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Originally Posted by Monster Mash View Post
You need to put enough water in the keg to cover the bottom before cutting with a plasma cutter, this keeps the slag from sticking to the bottom...
its not so much on the bottom as it is on the sides. feels like little pebbles all over. when i wipe with finger and a little elbow grease it comes off.
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Old 04-15-2011, 06:47 PM   #10
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Originally Posted by Pumbaa View Post
should be right near the bon ami and comet in your grocery store. As for the scrubies I strictly stick to plain green one
plain green ok good. and ill check grocery store today i could barely sleep i was so worried cant wait to get it all cleaned up.
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