In reply to Rock to Fakey:
> No. To be clearer, it was a question, but the one in the pic looks dire, but is it just surface rot?
No, corrosion like that can extend deep within the metal following grain boundries tearing the metal apart and completely destroying its structural integrity. Carabiners in that state are not safe.
> To bail off that could be risky, but mine, the rot is only in the gate piece, from hinge pin there are visible cracks, but my biner gate open strenth is sufficient for a bail off, the gate stays closed and i don't think the lower off loading would be a problem.
Throw it away today and wash the rest of your kit.
I say that as someone who is not at all paranoid about old tatty looking gear and is occasionally criticised for an 'it'll be reet' approach where others are more cautious. Someone who also recently threw away about a third of his crabs because the salt had got at them in just this way.
jk