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General Category >> Rubber Side Down! >> Plugging tank for rust removal
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Message started by jay313 on 06/05/12 at 08:30:32

Title: Plugging tank for rust removal
Post by jay313 on 06/05/12 at 08:30:32

I'm going to do the phosphoric acid treatment to a rusty old tank. What's the best way to plug the petcock and fill holes? Seems like tape would just come off.

Title: Re: Plugging tank for rust removal
Post by Dave on 06/05/12 at 09:16:12

I just took a small flat piece of metal and drilled two holes in the plate that matched the petcock hole locations, and made a matching rubber strip from some old rubber roofing. I then bolted the rubber and plate onto the tank bottom.

When it came time to remove the rust from the top of the tank I used Duct Tape to seal the filler neck, then I used another piece of rubber roofing placed on top of the Duct Tape, then put a flat block of aluminum over that, and then used a bar clamp through the speedometer hole to tighten the aluminum plate down on to the filler neck. I then placed the tank upside down on a plastic 5 gallon bucket just in case a leak occurred......which it didn't. It worked great.

Title: Re: Plugging tank for rust removal
Post by justin_o_guy2 on 06/05/12 at 09:18:37

You dont need to fill the tank to treat it. A cup sloshed around will do fine,do that about 3 times & youll have it all handled fine, Tape would be good enough.

Title: Re: Plugging tank for rust removal
Post by jay313 on 06/06/12 at 11:19:55

Thanks guys