Chapter 7:

H2O2 Material Compatibility

• All wetted surfaces should be made of materials that are compatible with hydrogen peroxide. The wetted
area or surface of a part, component, vessel or piping is a surface which is in permanent contact with or is
permanently exposed to the process fluid (liquid or gas).

  • Hydrogen Peroxide storability (and more generally, compatibility) is based off of the rate of decomposition when in contact with a given material.
  • Hydrogen Peroxide Material compatibility is generally ranked through a class structure.
    • Class 1: Materials Satisfactory for Unrestricted use with H2O2 ‒  Class 2: Materials Satisfactory for Repeated Short-Time Contract with H2O2.
      • Maximum of 4 hours at 160 F or 1 Week at 70 F.
    • Class 3: Materials Satisfactory for Short-Term Contact Only.
      • Less than 1 minute at 160 F and 1 hour at 70 F for unpressurized systems. Single use only.
    • Class 4: Not recommended for use with H2O2.
    • •The class system is only used to provide a relative guide, and is not a perfect system.
    •Surface finish and surface treatment has a large impact on compatibility.
    •Most Metals need to be passivated prior to service with HTP.
     

    --> Stainless Steel Compatibility Chart

    --> Aluminum Compatibility Chart


    --> Seals and Elastomers Compatibility Chart

    --> Metals to Avoid

    General Material Compatibility Checklist

Material Compatibility
10% H2O2		 Compatibility
30% H2O2		 Compatibility
50% H2O2		 Compatibility
100% H2O2
304 stainless steel B2 - Good B2 - Good B2 - Good B2 - Good
316 stainless steel B - Good B - Good A2 - Excellent A2 - Excellent
ABS plastic A - Excellent N/A N/A A - Excellent
Acetal (Delrin®) D - Severe Effect D - Severe Effect D - Severe Effect D - Severe Effect
Aluminum A - Excellent A - Excellent A - Excellent A - Excellent
Brass N/A N/A N/A D - Severe Effect
Bronze B1 - Good B1 - Good B1 - Good B1 - Good
Buna N (Nitrile) D - Severe Effect D - Severe Effect D - Severe Effect D - Severe Effect
Carbon graphite C - Fair C - Fair C - Fair C - Fair
Carpenter 20 C - Fair B - Good B - Good D - Severe Effect
Cast iron C - Fair B - Good N/A B - Good
Ceramic Al203 N/A N/A N/A A - Excellent
Ceramic magnet A - Excellent A - Excellent A - Excellent A - Excellent
Copper D - Severe Effect D - Severe Effect D - Severe Effect D - Severe Effect
CPVC A - Excellent A - Excellent A - Excellent A - Excellent
EPDM A - Excellent B - Good B - Good D - Severe Effect
Epoxy C1 - Fair B - Good N/A A - Excellent
Hastelloy-C® A - Excellent A - Excellent A - Excellent A - Excellent
Hypalon® D - Severe Effect D - Severe Effect D - Severe Effect D - Severe Effect
Hytrel® N/A N/A N/A N/A
Kel-F® A - Excellent B - Good A - Excellent B - Good
LDPE A - Excellent C2 - Fair C2 - Fair C2 - Fair
Natural rubber B - Good C - Fair C - Fair C - Fair
Neoprene D - Severe Effect D - Severe Effect D - Severe Effect D - Severe Effect
NORYL® A2 - Excellent A2 - Excellent N/A A - Excellent
Nylon C1 - Fair D - Severe Effect D - Severe Effect D - Severe Effect
Polycarbonate A2 - Excellent A2 - Excellent A2 - Excellent A - Excellent
Polypropylene A - Excellent B1 - Good B1 - Good B1 - Good
PPS (Ryton®) A - Excellent A1 - Excellent N/A C - Fair
PTFE (Teflon®) A - Excellent A - Excellent A - Excellent A - Excellent
PVC A1 - Excellent A1 - Excellent A1 - Excellent A - Excellent
PVDF (Kynar®) A - Excellent A - Excellent A1 - Excellent A1 - Excellent
Silicone A - Excellent B - Good B - Good B - Good
Titanium A - Excellent B1 - Good A - Excellent B - Good
Tygon® B - Good B - Good B - Good B - Good
Viton® A - Excellent A - Excellent A - Excellent A - Excellent

 

Ratings -- Chemical Effect
  1. Excellent.
  2. Good -- Minor Effect, slight corrosion or discoloration.
  3. Fair -- Moderate Effect, not recommended for continuous use. Softening, loss of strength, swelling may occur.
  4. Severe Effect, not recommended for ANY use.

    N/A = Information Not Available.

Explanation of Footnotes
  1. Satisfactory to 72°F (22° C)

  2. Satisfactory to 120°F (48° C)

  3. Satisfactory for )-rings

 

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