When using weathering steel (COR-TEN) on a project, what sort of bolts should I be using?
I have yet to see fixings made of weather steel; presumably because the way it uses a sacrificial layer to form a protective rust coating makes it unsuitable for precision applications (such as bolt threads; maintaining the structural area, etc.).
I am also aware that mixing different metals; even various steel alloys, can lead to accelerated corrosion due to anodic/cathodic behaviour.
So what type of bolts should be specified with weathering steel?