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02-07-2009, 09:10 PM
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#1
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Join Date: Aug 2008
Location: Austin, TX
Posts: 45
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metals and coatings for mash tuns?
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I am working on a cooler-based mash tun and I am having trouble finding a certain part, and it leads me to a question.
I have been looking for a stainless steel 3/4" washer for the internal side of the bulkhead. All I have been able to find is a zinc coated washer. Is the zinc coating a problem? Any negative interaction chemically with the mash? If so, where can I find a washer like this that is stainless steel?
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Red Dirt Brewing Co.
Planning: Belgian Pale Ale... maybe?
Secondary: Stillwater Saison v1
Kegged: Waving Wheat Ale
Drinking: Red Dirt Pale Ale
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02-07-2009, 09:16 PM
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#2
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Join Date: Jan 2007
Location: Cereal City, USA
Posts: 2,646
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zinc is a electrically active metal, they use it on boats to prevent corrosion on motor parts, so i wouldn't think that in your acidic wort would be a good place. i found my SS washer at the local farm supply store .(tsc)
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primary1 :UTOPIA BABY(still searching for it)
secondary:middling bastard ipa
kegged:simcoe blonde, crystal pale ale, yellow jacket golden ale, lemon shandy blonde
DRINKIN DAWG BREWERY
LET'S GO RED WINGS
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extraction calculator
grains in pounds(G) X 36(average points per gallon of grains) / batch size in gallons(g) = maximum efficiency(ME)
OG / ME = brewhouse efficiency
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02-07-2009, 09:49 PM
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#3
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Join Date: Jul 2008
Location: Dürty Soüth, GA
Posts: 1,374
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IIRC I found a SS 3/4" washer at Lowes... I still can't believe it myself...
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Originally Posted by Timberwolf
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02-07-2009, 10:00 PM
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#4
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Vendor and Brewer
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Join Date: Aug 2006
Location: Piscataway, NJ
Posts: 20,654
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Yup, 3/4" stainless washers are in the specialty drawers at Lowes. The closest lowes is always out of stock on them, but a newer one a little further away has them all the time.
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BrewHardware.com
Sightglass, Refractometer, Ball Valve, Weldless bulkhead, Thermometer, Decals, Stainless Steel Fittings, Compression Fittings, Camlock Quick Disconnects, Scale, RIMS tube, Plate Chiller, Chugger Pump, Super Clear Silicone Tubing, and more!
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02-07-2009, 10:52 PM
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#5
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Join Date: Feb 2006
Location: neighboring islands, Native Islander
Posts: 3,497
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Any marine supply or Chandlery will have stainless hareware and washers by the box full.
For inside a round MLT pre bend the washer to match the radius first before installing unless it's a square MLT with flat mounting surfaces. Many 3/4" washers are rather oversize in the ID, this is where a 5/8" almost fits then a quick bore on the lathe for a nice fit is required.
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Bier Jagdwaffe... Bier 30 zeit.....~~=o&o>..........
Last edited by BrewBeemer; 02-07-2009 at 10:58 PM.
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02-07-2009, 11:05 PM
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#6
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Join Date: Feb 2006
Location: neighboring islands, Native Islander
Posts: 3,497
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The ACE hardeware store in my small town has stainless not only in washers but SAE, Metric including left hand thread nuts, bolts and screws. True-Value has 1/10 of ACE, don't care plus higher priced.
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Bier Jagdwaffe... Bier 30 zeit.....~~=o&o>..........
Last edited by BrewBeemer; 02-07-2009 at 11:11 PM.
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02-08-2009, 01:47 PM
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#7
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Join Date: Dec 2008
Location: New Orleans
Posts: 247
Liked 6 Times on 6 Posts
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If you mix zinc (galvanized) metals with copper in a mildly acidic liquid you will be creating a battery. Both metals will corrode quickly.
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02-08-2009, 01:51 PM
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#8
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Join Date: Nov 2008
Location: Chicago
Posts: 142
Liked 1 Times on 1 Posts
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Got mine at Fastenal
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