I woudl have tried to get rid of the blown out sky, but otherwise this is gorgeous! Oh! I would havealso tried to get the bottom edge of the rusty area away from the bottom edge of the picture.
Each of the rust pieces in this Challenge has its own personality and each, so far, has been well done. This is no exception. It might have been fun to try different exposures to see if a tad darker one would have been interesting. Nevertheless, you photographed a pleasant composition.
Tonally, and technically in terms of detail, faultless. my first reaction was to wish you hadn't included the bunrt-out sky, and then to think how you might have avoided it ... couldn't say, but just 'cos it couldn't be helped doesn't mean it's good. Still, the rest of the image is excellent, love the movement from colour to reflected light as the eye follows around the stack.