Actually scrap the electrolysis idea if you value your health!! I have used it in the past with a copper anode etc to remove chrome and it does work after a time. However I didnt realise and only found out last night what noxious and toxic products the process produces. There seems to be a debate about it some say its fine some say its not. I`m not a chemist, but had I known about the possibilities its not something I would have done and its not something I would have suggested. In future when I need chrome removing, I will leave it to the people that do the plating.
In short if you are looking at bidding on the helm, to play safe, build the extra cost of having it de-plated safely by someone who can dispose of the waste in a safe way and away from you, your family and your neighbours.
Sorry about that, my bad..what do they say? a little knowledge is dangerous!!
Andy