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Letter 3781
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If it is a good grade of casting as opposed to one with lots of impurities, both aluminum and steel can be TIG welded fairly easily. The more porous carbon castings can be brazed with brass type filler metal. When TIG is the choice, the welded area has to be VERY clean. Engine parts are sometimes saturated with oil which will mess up the weld. They require a through degreasing before welding. Cast iron can also be welded or brazed. If your not sure about the quality of the casting, have the welder "fire up" on a non critical portion first. That way, if it's not going to work...you still have the clean joint to try something else on.
Mr. K. Holcomb
- Tulsa, Oklahoma
"Pot Metal" is easily repaired with Welco 52. A square wave TIG power source AC current with the balance set near the lowest setting will work good. You need to remove all grease, oils etc. and wire brush with stainless steel. Clean is the key. Use support on the back side of thin sections. Heat control can be tricky. You really need to be comfortable with a TIG torch in your hand before you try this. Use Argon for shielding gas. Any local welding supplier can get you Welco 52.
Bradford Maas
- Northfield, Minnesota
We use an epoxy that is used in repairing aluminum evaporator
coils, in refrigeration work. Then we clean the part really good then
we spray it with
Krylon brass metallic paint (allow to dry-one hour) then copper plate with
acid copper. Then simply finish the part. Works great too.
Philip Camp
- Phoenix City, Alabama
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+++ appended to this thread by editor I AM RESTORING A 1946 JUKEBOX IN WHICH A PIECE IS BROKEN AND MADE OUT OF POT METAL. I'M LOOKING TO REPAIR IT MY SELF OR HAVE IT REPAIRED. IN THE CONNECTICUT AREA I HAVE BEEN STRIKING OUT WITH REPAIR SERVICE CO, I NEED HELP. THANKS, RICHARD D
KENDRICK
++++ A product sold in the U.K. as Techno-Weld is a zinc based filler rod for aluminium, mag.alloys, mazak (pot metal)etc. It melts with a plumbers type blowtorch with no flux req. and can be used for joining metals or filling holes, defects etc.Care must be taken with zinc based alloys as the melting temp. of the rod will be very close to that of the parent metal. This method is more like brazing or soldering than welding. I'm sure this type of product is available in the U.S.A. from welding or engineering shops, it has got me out of trouble a few times. Colin Peck
+++++ I have used a product called HTS 735 II on pot metal and die-cast quite often..If this helps here's where I got it.. http://www.exposales.net/ M Birkholz
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Go to MuggyWeld.com and check out their Super Alloy 1 videos. I have tried J.B. weld with poor results. I have used Muggy welds Super Alloy 1 and it is easy to repair cracks, pits and missing pieces.
Eric J. Bremer
- Tomball, Texas
+++++++
I have a Porter Compressor C2002 air compressor, the valve broke off. Is there anyway I can fix this? I believe it is "pot Metal". I really don't want to purchase a new one!
John Marshall
buyer - Madras, Oregon
Check Out MuggyWeld.com, click on the link for Pot Metal - I think you will be interested in the information and video clips... They talk about car restore/parts needs.
Karen Price
- Charlotte, North Carolina
I just ordered some Muggy rod. I have used this rod before in some
pot metal pit a breakage repairs. It works pretty good sometimes. But
as usual, not on all pot metal repairs.
There is no standard pot metal repair system. Every piece is a
challenge. You never know what you will run into.
I have run into parts that will take the cyanide copper with no
problem. Then take what seems to be an identical part off the same
car and it will not take the copper. While going through my cleaners
and acid washes it will be a different color and even have spots that
are fizzing and erupting. Even though both of the parts are on the
same rack going through the same process at the same time they act
differently.
I know some people will say that I have missed something in cleaning
or rinsing or whatever. But after 40 years of doing this stuff , I
think I know basic proprietary cleaning.
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Frank DeGuire |
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July 21, 2009 The bracket broke on my glider Rocking Chair. There are
four metal brackets made of Pot Metal. Any one know of a
place I can send the bracket and have a new one made. I
don't think it can be glued and hold. Shirley Housh
July 23, 2009 Hi, Shirley. Generally not. Some materials like cast iron and bronze are made in simple sand molds by foundries, by simply pouring the molten metal into a cavity (still you would have to pay for the mold and all, which might set you back a few hundred dollars). But 'potmetal' is zinc or aluminum, and the parts are very thiwalled, so the molten metal must be driven into a complicated metal mold at high pressure. These molds costs thousands of dollars and you can't afford it for one or a few pieces. Look for a machine shop to make you a bracket out of steel if you can't find a replacement and yours can't be repaired. Good luck. Regards,
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