PROTECTING GALVANIZED SHEET METAL
PROTECTING GALVANIZED SHEET METAL
(OP)
We build sound attenuation systems and structures for power generation projects. Currently, we are looking into insulated panels made from 16 gauge, G90 galvanized, commercial quality sheet steel in 60 inch wide strips.
Here is our problem. The panels are too wide to be unsupported. We could really use a cold formed center stiffener. For best structural performance, we would want to stitch weld this stiffener to the inside of the panel. The problem is that the heat from welding could degrade the galvanizing. If that happens, we have just another patched, zinc primed panel and no longer the advantage of mill-galvanized material.
Does anyone know of a way to weld the stiffener on the inside face of 16 gauge sheet without damaging the galvanizing on the outside face? We are already thinking about thin wire, pulse arc MIG, but even that may still be too hot used just by itself. Have you other suggestions?
Here is our problem. The panels are too wide to be unsupported. We could really use a cold formed center stiffener. For best structural performance, we would want to stitch weld this stiffener to the inside of the panel. The problem is that the heat from welding could degrade the galvanizing. If that happens, we have just another patched, zinc primed panel and no longer the advantage of mill-galvanized material.
Does anyone know of a way to weld the stiffener on the inside face of 16 gauge sheet without damaging the galvanizing on the outside face? We are already thinking about thin wire, pulse arc MIG, but even that may still be too hot used just by itself. Have you other suggestions?





RE: PROTECTING GALVANIZED SHEET METAL
RE: PROTECTING GALVANIZED SHEET METAL
RE: PROTECTING GALVANIZED SHEET METAL
Alternatively try a structural adhesive. There are a number of adhesives about which are strong enough to remove the galvanized coating.
RE: PROTECTING GALVANIZED SHEET METAL
Regards,
Jeff
RE: PROTECTING GALVANIZED SHEET METAL
RE: PROTECTING GALVANIZED SHEET METAL
Aircraft to us is not apples to apples, but I would guess the truck body guys have a lot to tell me -- hence this web site, but thank you anyway.
RE: PROTECTING GALVANIZED SHEET METAL
RE: PROTECTING GALVANIZED SHEET METAL
Sorry i can't help with a product name - it's industrial stuff and should retail at £70 per litre. But if youre serious...