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Extruded Round Pure Magnesium Rod / Bar AZ31B ZK61M AZ91D Product details Name flexible magnesium anode rod for water heater Type anode rod for water heaters Certificate ISO9001:2008 Size Accept Custom Standard...
... as a protection electrode, which is connected with other metal to constitute the primary battery as negative electrode. The former protect the latter form corrosion through redox reaction sacrifice itself....