Immediately after final processing, the AquaPLEX
material forms a continuous chromium oxide layer on its surface. The process occurs when the high chromium content of AquaPLEX combines with oxygen in the air to form a "passive" layer of protection. This layer is permanent and prevents AquaPLEX from corroding when exposed to the dissolved oxygen and other aggressive elements found in all potable waters.
Electric water heater vessel being removed from pickling and passivation process tank.