MIL-STD-810 Method 504 Contamination by Fluids Testing

MIL-STD-810 contamination by fluids testing evaluates materials that are affected by contaminated fluids. As a certified MIL-STD 810 lab, we realize the importance of fluid testing. Meeting the MIL-810 fluid contamination test requirements can be difficult. Keystone understands the challenges and guides companies through the process. 

Keystone Compliance partners with customers to achieve MIL-STD 810 test and fluid contamination compliance. When products do not meet the requirements, we assist with finding solutions. Keystone Compliance’s proven process helps avoid product launch delays. Lastly, we take a consultative approach throughout the entire test program. 

Request a quote to receive testing services customized to your specific needs. Contact us to receive more information on contamination by fluids MIL-STD-810 testing.

The Importance of MIL-STD 810 Contamination by Fluid Compliance Testing

The MIL-810 contamination by fluids test shows if a material is affected by brief exposure to contaminating fluids/liquids. Such as they may be encountered and applied during its life cycle. These exposures can be either occasionally or over long periods of time.

The military testing for MIL-810 Method 504 is used when there is a high chance of fluid contamination. Contamination of the material may rise from exposure to hydraulic fluids, lubricating oils, solvents and cleaning fluids. De-icing and anti-freeze fluids may also cause exposure. Lastly, insecticides, disinfectants, collant dielectric fluid and fire extinguishants are also factors of contamination.

Contamination by fluids method 504 requires the use of substances and/or MIL-810 standard test procedures. These procedures may have an environmental impact or be injurious to health.

This military standard test is not used to show the ability of material to perform during continuous contact with a fluid. Nor should it be used to demonstrate resistance to electrolytic corrosion test conditions. These conditions are due to human perspiration.

How Fluid Contamination Method 504 Affects Products

Note the following examples of shock testing problems. These will help determine if the MIL-STD 810 compliance method is right for the material being tested. The environmental conditions listed below are not to be all-inclusive and some fluid contamination lab testing examples may overlap.


  • Breaking of glass vials and optical material.
  • Binding or slacking of moving parts.
  • Cracking solid pellets or grains in explosives.
  • Differential contraction, expansion rates or induced strain rates of dissimilar materials.
  • Packaging failures.
  • Adhesion failures.


  • Separation of constituents.
  • Failure of chemical agent protection.
  • Corrosion.
  • Melting Decomposition.


  • Changes in electrical and electronic components.
  • Excessive static electricity.
  • Increase in electrical resistance due to thermo-mechanical “fretting corrosion.”
  • Interruption of electrical continuity.

Information on the MIL-STD-810 Test Standard

Occasional Exposure – An item that is exposed to military testing lab chemicals for five to ten minutes. If standard ambient temperature is not used, this temperature is maintained for eight hours. Then, the item is brought to standard ambient temperature.

Intermittent Exposure – An item exposed to chemicals for eight hours of continuous contact. Then, the air dries for 16 or more hours at standard ambient conditions.

Extended Contamination – An item is exposed to a chemical for at least 24 hours, unless otherwise specified, with continuous contact.

Test Temperature – This MIL-810 test is performed with both the fluids and test specimen at standard ambient conditions unless stated differently from a customer. The temperature used does not exceed the operation/storage temperatures of the test item. Therefore, it will incur possible damage from over temperatures.

Test Item Temperature – Unless specified, the test items are stabilized at standard ambient temperature. For example, material to be decided will most likely be at or below freezing. Material exposed to hydraulic leaks may have surface temperatures higher than 50 degrees Celsius (122 degrees Fahrenheit).

Test Fluid Temperature – The contaminated specimens are stabilized at ambient conditions. Where appropriate, the temperature of the fluid equals its temperature during its most extreme operating condition.

Soak Temperature – The post contamination temperature soak will not necessarily reflect the exposure scenario. Rather the worst-case effect(s) on the material. For the soak temperature, the material’s maximum life cycle temperature for the likely exposure situation is used.

Keystone Compliance Provides Effective Contamination by Fluids Compliance Testing

Keystone Compliance is a trusted fluid contamination 810-testing lab equipped to provide fluid testing for military, commercial and aerospace products and companies.

In addition to MIL-STD-810 contamination by fluids lab testing, Keystone has a full scope of expertise including freeze-thaw, pyroshock, and humidity. Our team strives to give customers more time and energy on product development instead of testing. 

Contact us to receive more information on MIL-STD-810 fluid contamination testing.