basementplumbing
I don't know what it is. It's sticking out of my wall. Does anyone have any ideas? It looks like a piece of metal. And lately, I've seen some dampness and water pooling on it a bit. And the area where it is around the floor looks like there is some dampness.
The Family Handyman recommends using rigid foam, caulk, and spray foam to insulate the rim joist, in this article Insulate Basement Rim Joists.
Not sure if this is exactly what you're looking to do, but the idea should work in your situation I think.
Cut rigid foam to fit between joists.
Insert foam into gaps (against rim joist).
Caulk around the edge of the foam.
Fill any gaps in the rigid foam where pipes or vents pass through, with spray foam.
I agree with @BrownRedHawk: find the manual online and then look for the exploded parts view. You'll find a part number and use that to search. I actually find most common parts like wheels and stuff on Amazon but for this part you're looking for you may have to look harder. I have had a lot of success with http://www.searspartsdirect.com/
Best Answer
It looks like you have a basement laundry room with cinder block walls. The vertical structure doesn't look like metal to me, more like fiberboard put up to hide a soil stack and other plumbing. With the shampoo and wash cloth hanging on the utility sink... Do you have a shower down there too?
Either the plumbing hidden behind the fiberboard wall may be leaking or the humidity from laundry or a shower may be condensing on the wall or whatever's behind the fiberboard, then soaking through from behind and puddling on the floor.
To figure out what's really happening you'll probably have to unscrew the fiberboard and look behind it. If it's a leak, fix it. If it's condensation, there are several ways to address it depending on how much effort and expense you're willing to go to.