Here is the new link - http://nautarch.tamu.edu/CRL/conservationmanual/File10a.htmAnd lastly, when in doubt, consult the experts. Here's where I learned about eletrolytic derusting more than a decade ago. These guys do it for a living and they're working with historical treasures that have been soaking in salt water for centuries:
Iron Conservation: Part I - Introduction and Equipment - Conservation Manual - Conservation Research Laboratory - Center for Maritime Archaeology and Conservation - Texas A&M University You're interested in the section on 'electrolytic reduction cleaning.' Note that they get their anode and cathode terms backward because they are archaeologists, not solutions chemists. Also note that they are probably much more worried about chloride (from seawater) than you need to be.