What Causes SWG Electrode Corrosion?

[JodieM]

My Jandy Aqua Pure will be 2 years old next month. It began to leak on the surface of the clear lid last season. A new lid has been ordered under warranty. I had a look at the old one today and noticed that the center electrode plate is chipped away like corrosion. What would cause this? My PM logs are available.

PoolMath Logs

 

[Jimrahbe]

Jodie..

Show us a couple of pics..

Are you sure it is not scale?

The electrodes do wear away, but I would not think you would see this at 2 years old.

Do you use the SuperChlorinate option at all?

How long do you normally run your cell per day and at what output percentage?

Thanks,

Jim R.

 

[JodieM]

Looking back over my PM logs it looks like I run the cell about 30% in May and June and 50-60% in July and Aug. My CYA is usually around 70. I like my chlorine between 6-8.

I have never used Super Chlorinate, if I need to increase FC after a party I use liquid chlorine.

I have a 1 HP Dual Speed pump. I run it on low 20 hrs except for high 4 hours during peek heat of the day.

 

[JamesW]

The center plate gets the most current and it's where the electrode is welded to the plate. The combination makes it the most susceptible to corrosion.

 

[JodieM]

In just 2 seasons though?

 

[JamesW]

In just 2 seasons though?

You should get about 5 years from a cell.

The center plate is most likely to suffer premature failure due to the heat from welding and the high current.