Titanium Anode for Pool Water

A pool water disinfection anode is a Grade 1 or Grade 2 titanium plate coated with mixed metal oxides, usually RuO₂ and IrO₂. Mounted in an electrolytic cell, it oxidizes dissolved chloride into chlorine gas, which dissolves as hypochlorous acid (HOCl) — the same active sanitizer you get from liquid chlorine. Residential salt cells typically run 6,000–15,000 hours. Commercial brine systems run two to five years.
Specification note

Do not size a brine anode like a salt-cell anode. Brine systems run at two to five times the current density. A coating that lasts 12,000 hours at 300 A/m² will not last 12,000 hours at 1,200 A/m². If a quote treats them as interchangeable, the number on the quote is the problem.