(Text on screen): TIG Welding Copper to Steel, Kevin Caron, www.kevincaron.com The Voice: Hey, Kevin. What are you doing? Kevin Caron: You know, I’ve been making all these little videos on cutting and welding and working with metal and working with the machines and how to put stuff together and I thought, “Hey, let’s do an art video for once. Let’s talk about making something pretty.” This is a bell that I’ve been playing with. And it started out as a straight bell. And then I just cut it at an angle, and then turned all the different angles. Chamfered all the edges. And then as I welded them back together, I started getting a little twist going in there. And I thought, well, yeah, but that’s kind of boring. After all, I’ve just got these straight weld lines. I’m just going to grind them smooth. OK, I’ve got this real twisty little bell. That’s fine. But how about something different? Let’s do something weird. Something unusual. Well, I know I’ve played with welding copper to steel. You get a galvanic response out of it when it gets wet. The Voice: What does that mean: “A galvanic response”? Kevin Caron: That means you get a lot of corrosion. The two dissimilar metals, the steel and the copper, when they get wet they corrode very quickly right in that joint, and you get a big mess out of it. So, there’s a way around that. We’ll take about that later. But I thought, well, let me come back in and I’ll just grind away some of that weld that I put in and then I’ll come back and lay some copper in it. Because then I can get my sculpt nouveau patinas in there, because some of those only work on copper. It will rust metal, but they’ll color copper. That might be cool. It might mean I’ll get different colors. I’ll get color in the rust. I’ll get all kinds of weird little happenings going on there. Then when you’re all done, and it’s nice and dry (that’s the big secret: nice and dry; low humidity) then you seal it with your lacquers or with anything. Anything that you can put on there to help seal it to keep the moisture from getting into the joints where the two dissimilar metals are. Now, you’ve got to remember, this is for decoration only. This is not structural. The holding properties between the steel and the copper are not very good. So, you’ve got to have a good steel-to-steel weld under them, and then you just put this in as an inlay; a little decoration over the top. So, put your helmet on and we’ll weld some copper in here. So, I’m just running the; I’ve got the Miller 200 running. Just going to run a few little beads with the big welder through there so you can see what it looks like. You ready? The Voice: Let’s go. (welding) Kevin Caron: And this is where you learn why we use copper for our cooking utensils. Because, boy, that little piece of wire started getting hot really quick. Because the heat travels through that copper so well. Let me get these last little two. Then we’ll get the grinder and clean it up just a little bit. Get your helmet on. (welding) I’m sure you saw the; you can see there’s a little soot there, from the weld. And you probably noticed a little bit of green flash that you’re getting off the weld. Now, if you’re just welding steel, that’s a sure indication that your tip is contaminated. But when you’re just welding the copper, it’s just the copper itself burning off. That’s really the only difference. I mean, it welds exactly the same to steel. You use just about the same amperage. Use the same gas mix. Use the same torch. Use the same electrode. Use all the same motions and everything. It’s just that you’re welding two dissimilar metals together. Or, you can even just weld copper-to-copper. If you want to weld pipes together, you want to weld sculptures together. It works great, too. Let me get the grinder and I’ll clean this up just a little bit. Hang on to your ears. (grinding) You can kind of see what you’re getting now, you know? The nice, shiny steel? You’ve got the copper insert; you have copper inlay down inside there. You get that all ground in there nice and smooth. You have just that little touch of copper. So you come in with the copper patinas and get one color, you can come in with the steel patinas and get a different color. When you’re all done with it, you can cover it with a wax that helps seal things in, and cover it with the varnishes or with the lacquers to help seal it all and keep all the moisture out of it. The sky’s the limit anymore. You can do anything you want, guys. Go practice. I’ve got to go back to work. See you later. (Text on screen): Subscribe to See More Videos! See and hear more at KevinCaron.com.