question for you materials people

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cheapgoose

Diamond Member
May 13, 2002
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ok, so I'm building myself a resevior, got myself some brass nipples, but the only nuts I can find are Galvanized. now this will be under water and I was wondering if the combo will increase errosion.

it deosn't say galvanized what but my guess is steel, it's has a blackish metal look.

tks.
 
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rgwalt

Diamond Member
Apr 22, 2000
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Generally mixing metals isn't a good idea, but I don't know about your particular combination. Are you going to have to remove the nuts regularly? If not, you could coat them with some silicone sealant so they wouldn't be exposed to the water.

Ryan
 
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KenGr

Senior member
Aug 22, 2002
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I'm having a real hard time figuring out what bits and pieces you have and how you are combining them. A "nipple" (oh, shut up you guys) is a short piece of pipe with standard pipe threads on each end. Brass units like this are unusual except for decorative items or very small piping. They are usually steel. When you say "nuts" (I said SHUT UP, you pervs) do you mean ferrule fittings to attach tubing? I've never seen these as anything except brass or copper (sometimes chrome plated).

If it's galvanized, it should be dull silver, not black. Black is "iron" pipe which is actually steel. The dissimilar metals are discouraged but galvanized and brass is not a high corrosion combination, except in strong electrolytes like seawater.
 
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cheapgoose

Diamond Member
May 13, 2002
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Originally posted by: KenGr
I'm having a real hard time figuring out what bits and pieces you have and how you are combining them. A "nipple" (oh, shut up you guys) is a short piece of pipe with standard pipe threads on each end. Brass units like this are unusual except for decorative items or very small piping. They are usually steel. When you say "nuts" (I said SHUT UP, you pervs) do you mean ferrule fittings to attach tubing? I've never seen these as anything except brass or copper (sometimes chrome plated).

If it's galvanized, it should be dull silver, not black. Black is "iron" pipe which is actually steel. The dissimilar metals are discouraged but galvanized and brass is not a high corrosion combination, except in strong electrolytes like seawater.
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sorry for the poor description, yes the galvanized piece is dull silver, I think I meant to say dark silver/metalish color.

anyway, all I wanna do is drill a hole in an container, insert the piping end of the nipple and secure it in place with the nut inside of the container. hope that helps. but I think my question has already been answered. the part will be in distill water. just wanted to make sure the combo doesn't actually increase corrosion.

tks!

 
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