Materials for Making Chlorine Electrolyzer from Electrolytic Salt Electrochlorination
Electrolysis of salt water to chlorine is to direct use of electrodes to electrolysis of salt water or sea water, chlorine gas generated in the electrolysis anode and OH generated in the cathode reaction to create hypochlorite and it has a certain degree of disinfection and sterilization effect.
The materials of the anode is the key of the technology of making chlorine from electrolytic salt water. In the process of electrolysis of salt water, especially in the process of seawater electrolysis, due to the low concentration of sodium chloride, the anode reaction not only involves chlorine evolution, but also oxygen evolution. That’s why it has a high requirement of electrolysis anode. After repeated testing and application by many domestic manufacturers, titanium anodes coated with multielement noble metal oxides are increasingly used in electrolytic salt water and sea water chlorine electrolyzer. Common anodes with ruthenium-iridium coating and some ingot metal oxide coating are also used for platinum-based plating, or platinum-based anodes and other mixed metal oxide coating anodes. Among them, the titanium-based noble metal oxide anode has been increasingly used in the industry of electrolytic salt water and sea water chlorine production in recent years due to its good electrocatalytic activity and relatively low price and high cost performance.