Three interesting studies Doug.
It's a real challenge to see and create art from something so unlikely as a rusty piece of iron. I think you've succeeded particularly well with pic2 and pic3.
In pic2 the muted colour and texture of old wood grain really work well with the rusty fixing. The linear grain structure creates an interesting geometric counterpoint to the circular washer and the lines of the bolt head and triangular motif.
If pic2 is a crop from a larger photo it might be interesting to play around with the position of the bolt - perhaps experimenting with the rule of thirds? Pic1 conforms well to this principle and in consequence has a very pleasing and "balanced" feel to it.
IMO pic3 is all about form and texture and I think it works pretty well at grabbing and holding interest
Bruce
