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P.S. I still use tin cans as a source of sheet metal. There was a big storm a while ago, with tree branches whistling by at high speed. (Not a good time to be o
by WalterBright 5mo ago
P.S. I still use tin cans as a source of sheet metal. There was a big storm a while ago, with tree branches whistling by at high speed. (Not a good time to be outside.)
Three holes were punched in the house by the branches, 1-2 inches in diameter. What to do, what to do. I took a coke can, slit it and unrolled it into sheet metal. Then cut a disk bigger than the hole, and epoxied it into place. Worked like a charm, and cost nothing.
I've used coke can metal for shingles and flashing, too. They don't rust.
- fragmede 5mo agothere's also a plastic liner on them that I'm sure helps.
- echoangle 5mo agoIt also helps that they are made from aluminum which doesn’t rust like iron does.
- euroderf 5mo agoAnd epoxy binds to aluminum just fine ? Epoxy is weird. What solid material does it NOT bond to ?
- ridgeguy 5mo agoTeflon.
- AlotOfReading 5mo agoPolyethylene, like they use in food containers. Virtually nothing sticks to it unless specifically designed.
- mjanx123 5mo agoIt does not bond to polypropylene and other low surface energy plastics
- psd1 5mo agoTerminology question - I understood those to be "high-energy" surfaces, because the chains are strongly bound. Is it a typo, or am I wrong?
- mjanx123 5mo agoIt is really called low energy, it refers to the low attractive force of the surface, liquids bead up and do not wetten, in epoxy that results in small contact area and a weak bond, on a high surface energy material it flows into all the crannies and has enormous contact area and a strong bond.
- hdrz 5mo agoIt rusts just like iron, but the rust (AlOx, or alumina) stays bonded to the metal and actually protects it.
- lloeki 5mo agoRust being literal Fe2O3 makes a convincing argument that aluminium sure oxidises but doesn't rust pretty much by definition ;)
- wongarsu 5mo agoIn other words: it rusts, but it doesn't rust like iron. It rusts in a much less destructive way because the aluminum oxide protects the rest of the aluminum from oxygen
- redeeman 5mo agoit does not rust, it corrodes :)
- psd1 5mo agoI like that story. I fixed a microwave door latch with a beer-can shim and some decorative ribbon; we used it another 11 years.