DI Water Compatibility Chart

We design and sell a complete line of DI and RO/DI hybrid water processors. So we naturally get a lot of request for information about DI material compatibility. The table below lists the most common interactions. Talk to your local Clean Water Crusader if you require more information.

Common Industrial Materials and their compatibility with deionized water

Material Compatibility
304 stainless steel A1-Excellent
316 stainless steel A2-Excellent
ABS plastic N/A
Acetal (Delrinr) N/A
Aluminum A2-Excellent
Brass A-Excellent
Bronze N/A
Buna N (Nitrile) A1-Excellent
Carbon graphite A2-Excellent
Carbon Steel D-Severe Effect
Carpenter 20 N/A
Cast iron/Galvanized Iron/Ductile/Black Iron Pipe D-Severe Effect
Ceramic Al203 B-Good
Ceramic magnet N/A
ChemRaz (FFKM) D-Severe Effect
Copper D-Severe Effect
CPVC A-Excellent
EPDM A1-Excellent
Epoxy A2-Excellent
Fluorocarbon (FKM) A-Excellent
Hastelloy-Cr A2-Excellent
Hypalonr A2-Excellent
Hytrelr N/A
Kalrez N/A
Kel-Fr A1-Excellent
Natural rubber A-Excellent
Neoprene A-Excellent
NORYL A2-Excellent
Nylon A1-Excellent
Polycarbonate N/A
Polyetherether Ketone (PEEK) N/A
Polypropylene A2-Excellent
Polyurethane N/A
PPS (Ryton®) A-Excellent
PTFE A2-Excellent
PVC A2-Excellent
PVDF (Kynar®) A2-Excellent
Silicone N/A
Titanium A2-Excellent
Tygonr A2-Excellent
Vitonr A1-Excellent

Ratings  –  Chemical Effect


A = Excellent
B = Good

Minor Effect, slight corrosion or discoloration
C = Fair

Moderate Effect, not recommended for continuous use. Softening, loss of strength, swelling may occur

D = Severe Effect, not recommended for ANY use.

N/A = Information Not Available.

Explanation of Superscript
1. Satisfactory to 72°F (22° C)
2. Satisfactory to 120°F (48° C)

4:00 pm | by Greg Reyneke

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