The objective of this research is to find out whether the method of ionization by separating water electrolysis can be used for the preparation of alkaline water production to produce hydroxyl ions which is widely talked will be useful effect for our body. This research is also useful for finding the best type of metal that is not corroded and become harmful to human health and to study the chemical reaction involved in the system. The study also included observation of the effects of the addition 100 and 200ppm salt into system. Method used in this experiment is by separating electrolysis chamber to produce ionized water using two electrodes chamber connected by a cotton as membrane and DC adaptor as power source. Material needed for this process are separated electrolysis equipment, water, and adaptor. The result show that alkaline water will be produce by ionization of separated water electrolysis in cathode chamber while acid water will be produced in anode chamber. Research was done with variations in electrodes and composition of salt vs. contact time. Result show that most of the electrodes were corroded by salt except of aluminum. Conclusion from the experiment show that pure titanium and aluminum is suitable to prepare alkaline water using water separating water electrolysis ionization method.