Seven plates. All of them coated.
Ruthenium–iridium mixed metal oxide, both faces, every plate. On a reverse-polarity cell each plate takes its turn as the anode, so there is no plate that can afford to be bare. 1.0 mm thick, 4.0 mm apart.
Hard water leaves calcium on the coating.
Not damage — a deposit, sitting on top of a layer that has not changed. This is the point in the week where a monopolar cell owner goes and finds the acid.
The plates swap roles. The scale lets go.
Anode becomes cathode, cathode becomes anode. What grew under one polarity has nothing holding it under the other, and the water carries it out through a 50 mm port.
Rated ≥10,000 h. The coating is still the coating.
You are looking at the frame this cycle opened on — the same plates, the same layer. Across the cycle the only thing that was spent is your maintenance schedule.
Rated ≥10,000 h — and nothing in the routine touches the layer.
Endurance is what the reversal is for. The coating is never scrubbed, never soaked, never handled; what finally ends a cell is the layer being used up making chlorine, not the maintenance it survived.
RP — this cellRP — reverse polarity
Every plate is coated on both faces, because every plate takes its turn as the anode. The cell sheds its own scale. No acid washing.
Descaling routine None
AC — the alternativeAC — monopolar
Coated anodes, bare titanium cathodes. Polarity never reverses, so scale builds up: plan on a periodic acid wash, 1 part HCl to 15 parts water.
Descaling routine HCl 1:15, periodic
What this page will not print Coating load — grams of mixed metal oxide per square metre — is the specification that separates a good cell from a cheap one. The factory has not released its figure, so no figure appears here. Ask us for it in writing, and ask whoever else is quoting you for theirs.
