We got to the beach nearly every weekend during the summer. My chairs rust on the bottom. Once that happens what could I do to fix them rather than throwing them away? JB Weld?

Rust through or cosmetic? This will probably buy you some time. Works pretty well.

https://www.amazon.com/Rust-Oleum-Automotive-248658-10-25-Ounce-Reformer/dp/B003HG48AC

I'll use that from now on, but several are rusted through.

Rusted through = trash

wooden dowel rod piece inside of metal pipe.

Chairs have any sentimental value? Were they expensive to begin with?

If one or both of the above, you could find a short piece of rebar of similar diameter, insert, and where the chair broke, if you know someone with a welder they could weld the chair pieces together and to the rebar. Paint with the Restorer above, then top coat with a decent paint.

If not the above to the above two questions, they are done.

Cut it clean 1/2 inch on each side at the break and use a pvc coupler from the sprinkler section.

Lots of ways to fix that. I'd just weld it but I have the welders to do that thin metal work.

A ID sized dowel epoxy glued inside would work, with a wrap of fiberglass and epoxy on the outside. Again, I have all that laying around from my boat building work.

Throw it out.

Dowel rod on the inside is good. Sleeveing the outside with a piece of EMT (metal conduit) should work too.

WestGalvestonAggie said:

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Throw it out.

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I agree, but $75 chair lasted only 2 summers. It's 2nd one

rlb28 said:

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WestGalvestonAggie said:

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Throw it out.

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I agree, but $75 chair lasted only 2 summers. It's 2nd one

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$75 chairs are the new $20 chairs.

Welcome to 2022.

This won't repair what you have. I would suggest buying chairs with aluminum legs in the future. It will be more expensive and less options, but they should last longer in a beach environment.