In terms of DI water being a corrosive liquid, i have gotten different feedbacks from different specialist about this.
We have a detergent dispenser system running on metering pumps that uses copper piping that carries DI water to flush the detergent.
Our main lines are created from Sch 80 PVC pipes. DI water will degrade the piping and probably leach impurities into the water. Yes, that’s right! The absolute purity of a dilution water supplied for it would not be critical as far as resistivity downstream of the dilution point is concerned. Will have a low resistivity when diluted as the molecule ionises. PVC has the ability to leach plasticisers into the process stream over time, and would not be top choice of piping material to maintain semiconductor ultrapure water quality. DI water is extremely corrosive. It is so that’s being that water naturally tends to dissociate into hydrogen and hydroxyl ions, and the ions in turn tend to exchange with any polar substances in contact with the water. Ultrapure water is easily available with current technology even in an industrial environment.
Don’t confuse pH with corrosion.
I’m almost sure I have to add acid to lower the pH or baking soda to raise it toward the target, It fluctuates with rain. Use. And stuff.
Perfectly pure water could be neutral as there is nothing disolved in it to affect the pH. When water flows through a buried metal pipe or a ship moves through water, Same thing happens, for a totally different reason. Then again, as is noted pure water becomes hungry or ion hungry so when it contacts material that has a relatively loose hold on its ions the water pulls them away from the material causing corrosion. Cu and Cu alloys, that has data regarding Distilled water.