I'm not sure, but it looks as if the ones that look this, the factory clear lacquer was never removed.
Mine looked like that and I stripped the finish, wire brushed them, and buffed them on a buffing wheel. (and, it's rust - not corrosion).
Do you have a wood lathe by chance ??

 

John,

Yes, I have a WEN 3424T lathe. I was thinking of using tripoli and white diamond abrasive to clean them up. The pictures you posted is what I'd like to have these looking like.

 

Those will clean up fine. I would use a cut off wheel in a grinder to remove the broken part, & I would start with a wire wheel to remove the rust.

 

On the other hand, sharpening up the remaining cutting edge after buffing out will keep the tool in useful condition until eventually the edge is sharpened back to the full profile. Could take awhile....

 

I first removed the factory finish with a solvent, which is probably lacquer of some kind. Then, I put a drill press chuck in my wood lathe and chucked up a medium 4" wire brush to remove the loose rust. Then, an assortment of 6" cloth buffing wheels with lots of elbow grease. It is a time-consuming and labor-intensive project, but well worth the effort in the end. That is just half of the project. The other half is getting them properly shaped and sharpened.
Please post some photos when you get started.

 

On the broken gouge it looks like soft metal and I would cut the end off with a hacksaw and then regrind with a cup of water to keep it cool or you will burn the edge. On the rest of the chisels they look like the old chromiumsteel plated ones which would rust in a second if not taken care of.
Put them in a lacquer bath and use 0000 steelwool to clean them off and then if you have a wirewheel take the rest off with that. Then take your time in flattening the backs and then sharpen the edge of the blade. After it is all done then put a thin coating of 3&1 oil in them to keep from rusting again and put some diccent bags that soak up moisture instead of the chisel's