Help me with dry cell build

[ArcX]

I am planning on building dry cell electrolyzer but when I looked around online I couldn't find any decent plans for one. I'm thinking my best bet would be to go with an 11 plate cell. I plan to use this for a hydroxy torch. I also have a small pump (75 GPH) that I want to use to circulate the water/electrolyte but I'm not sure if the electrolyte will rust/corrode the metal shaft over time. I also don't have anything to supply power other than a 12v 6 amp battery charger, but I don't think that would be enough.

Thanks in advanced.