Stu the basic architecture work isn't bad, but there are some things worth noting.
1. Its not very shippish. Pressurized volume is at a premium on a starship, so big wide open corridors with volume wasted by an arched cieling isn't likely to be part of the design manual.
2. The textures are wholly inappropriate. Those are "Dirty" textures meant for faking low level panelling in an additive texture setup. I suggest looking at Star Wars, Star Trek or even Babylon 5 for wall design/texturing.
3. Your edges are very sharp and distinct. In the real world, nothing is sharp and distinct like that.
4. What is the source of your lighting? The scene is well lit, but lacks well defined lightsources. For most renders, this wouldn't matter, but we're inside a passageway on a starship. In such an artificial environment, we need to see a source of light for it to feel 'real'.
You've done good work, but you've got more to do.