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What Materials Are Compatible With Deionized Water?

Marjorie Gilbert

Deionized water is, simply put, water with the ions removed. This water works well in cooling applications because it doesn't contain mineral deposits which could restrict the flow when used as a coolant. Because there are no ions in deionized water, you don't have to worry about arching when you use deionized water for cooling electronics. However, there are some considerations that must be taken, for not all materials are compatible with deionized water.

Stainless Steel

Stainless steel is a material that does not react to deionized water. Stainless steel contains a low amount of carbon. It also contains 10 percent per weight of chromium. It also contains nickle, molybdenum and nitrogen which, combined with the chromium, makes stainless steel very corrosion resistant. For this reason, stainless steel is a material that is not corroded when it comes in contact with deionized water.

Nickle Plating

Nickel plating is an effective way to protect metal from corroding when it comes in contact with deionized water. This is because the nickel plating which contains 9 percent of a phosphorous-nickel alloy.


PVC is another material that is compatible with deionized water. PVC does not conduct electricity, and is resistant to chemicals.