Removing oxidisation after welding

by **mullamulla** » Tue Aug 14, 2012 3:12 pm

Just got my keg back from the welder, :dance: a pig in shit I am

Just one question though, are there any methods for removing the rusty crap from out of it and around the joins or should I even bother? :text-thankyoublue:

by **Kimbo** » Tue Aug 14, 2012 4:45 pm

Hi Mulla,
are you sure its rust and not old beer?
coz S/S kegs don't normally rust.

by **mullamulla** » Tue Aug 14, 2012 6:26 pm

Cheers Kimbo, Nah, the keg was spotless clean before it hit the welders, I know nothing about welding but it seems like some sort of splatter from the welding process, or maybe the hole cutting??

I've read something about citric acid being used, might dig a bit deeper into that. :think:

by **caveman** » Tue Aug 14, 2012 7:10 pm

Hey bokaman what you have there is oxidisation from the process of cutting the staino and welding staino is easily contaminated by other metals, grinding discs that contact the surface they may have been cutting other metals before cutting your staino and cross contaminated that way . Just get the wire brush out and go crazy with it then give it a good wipe down with a rag soaked in acetone as the acetone acts as a pickling agent and it shuld hopefully fix it or at least stop it from getting worse . Hope that helps ya out mate keep me informed on how it goes :handgestures-thumbupleft: cheeres caveman

by **cereal_killer** » Tue Aug 14, 2012 7:12 pm

^^^^^

Spot on info there mate....

by **mullamulla** » Tue Aug 14, 2012 7:18 pm

Much appreciated Caveman :handgestures-thumbupleft:

I'll see if I can get in there tomorrow, might have to rig something up on the end of a pole as I've only got a 3" port on the top to work from.

by **law-of-ohms** » Tue Aug 14, 2012 7:52 pm

I use one of these....

http://www.tigbrush.com/

Thanks work!

by **emptyglass** » Wed Aug 15, 2012 12:09 am

If the hole was cut with a plasma, it could be plasma snot.
You might want to pickle it properly.

But give it a plain old tub up before you do, in case its just organic stuff that got burnt.

by **stilly_bugger** » Wed Aug 15, 2012 1:13 am

I found that using the keg for its intended purpose — as a boiler — cleans oxidation up pretty good. Hot wash seems to strip off stuff that I couldn't remove by hand. All cleaning runs, of course.

by **mullamulla** » Wed Aug 15, 2012 10:39 am

I thought that it would be a nightmare scrubbing this keg but Old Eraserhead here seems to be doing the job easy..

I'd imagine when I'm finished here the hot vinigar will make short work of anything left :text-thankyoublue:

by **batbrew** » Thu Nov 15, 2012 4:04 am

The soil on the side looks like protein deposit - soak with 4% caustic soda and heat to 80C. Empty and then scrub with your scourer - should came sparkling bright

by **Urrazeb** » Thu Nov 15, 2012 4:13 am

U don't need caustic to clean SS unless it is absolutely burnt on. Distilling and caustic should never mix, this shit is toxic

by **Rumdrinker** » Fri Nov 16, 2012 1:40 pm

4% caustic soda (Sodium Hydroxide) is a fairly low strength mixture & can be used quite safely with the right precautions. A thorough flush of the boiler with water will see it gone & a test with the PH meter will confirm - keep flushing with tap water until the PH is @ your water reading