Galvanized Steel Options

[bulitt]

Did you all know that Galvanized paint was invented back in 1830's, and galvanized metal has been discovered on some armor used in India in the 1700's! So I am assuming it was cost prohibited in the 1970's? Or was the steel used on the 914's galvanized but maybe the technique was not perfected. American cars were built with a predetermined life (planned obsolescence) so the consumer would buy new every several years. Porsche too? (IMG:style_emoticons/default/confused24.gif)

Or maybe they were designed to be bio-degradable, a green product...

[nathansnathan]

One of the replacement panels I got from Restoration design, a passenger inner fender well, was I think galvanized.

I bead blasted the primer off, sanded it with 180 grit, cleaned it with acetone, and it looked like clean bare steel, but tig welded it and it got all yellow powder.

I had to take a course wire wheel on an angle grinder to get past what looked like electroplating, some kind of metal all coating both sides. It took hours.

Seems pretty dumb, to galvanize a replacement panel that is going to have to be welded in.

[Tom_T]

One of the replacement panels I got from Restoration design, a passenger inner fender well, was I think galvanized.

I bead blasted the primer off, sanded it with 180 grit, cleaned it with acetone, and it looked like clean bare steel, but tig welded it and it got all yellow powder.

I had to take a course wire wheel on an angle grinder to get past what looked like electroplating, some kind of metal all coating both sides. It took hours.

Seems pretty dumb, to galvanize a replacement panel that is going to have to be welded in.

Nathan,

It's not dumb, because the entire sheet before stamping, or the part after stamping, would be hot dipped or otherwise treated as a whole - they cannot "not treat" only the edges where it would be welded.

That panel of yours - if galvanized or other rust preventative treatment - would protect it from future rust. Most shops scuff off the treatment/coating in the area to be welded only & leave the rest, and then re-coat the welded area afterwards to protect it too from rust in the future.

I think that's what Rick, Mark, Scotty would say that they do.

[nathansnathan]

Nathan,

It's not dumb, because the entire sheet before stamping, or the part after stamping, would be hot dipped or otherwise treated as a whole - they cannot "not treat" only the edges where it would be welded.

That panel of yours - if galvanized or other rust preventative treatment - would protect it from future rust. Most shops scuff off the treatment/coating in the area to be welded only & leave the rest, and then re-coat the welded area afterwards to protect it too from rust in the future.

I think that's what Rick, Mark, Scotty would say that they do.

On certain parts it just doesn't make sense. The factory welded this bit in 53 spots. The heat spreads like an inch radius from each weld so there's not going to be a lot of galvanization left, just contaminated welds and toxic gas. (IMG:style_emoticons/default/smile.gif) It was definitely some kind of plating, definitely metallic. Here I was ready to weld, having bead blasted and sanded everything to metal, but clean as it looks, there is another layer that needs to come off in this pic. I should have got some pictures of the yellow crap.