Joined: Jan 2010
Posts: 9,813
Likes: 1,790
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
The spokes would be safe to ride on if they are tensioned to an adequate and sufficiently-uniform tension level for the loading that they will see.
They typically would only fail one at a time if ridden long enough to bring on fatigue failure. I've ridden much worse-looking spokes but the brand of spokes can be much more important than differences in the level of corrosion..