Jim Shaw, Crystal Group’s EVP of Engineering explains why MIL-STD-810, Method 509.5 (salt fog) is performed to determine the effectiveness of protective coatings and finishes on material.
MIL-STD-810 Test Method 509.5 Salt Fog
Hi, Jim Shaw here from Crystal Group. Doing a little bit deeper dive again into MIL-STD-810. Today we’re talking about method 509 which is essentially salt fog testing. What we’re doing is we’re measuring the resistance of the product, in this case servers, to resist the exposure or withstand exposure to salt in the environment. And this is usually something that’s relatively important in naval applications but it could be anything and so what we’re looking for in a salt fog test is essentially corrosion and degradation of the materials associated with the product.
For instance, the effect of salt on aluminum or salt on contacts or materials that would create, potentially, shorts in the system or damage to the material properties. Normally this test is done for four days and so it’s a 24-hour spray of a 5% salt solution and the temperature is generally kept around 35 degrees. And then after 24 hours the unit is taken out and allowed to dry for 24 hours. And then it goes back in the chamber and is subjected to the 5% salt spray, or salt fog, for another 24. And then it comes out and does another 24-hour dry.
And then the unit is powered on and there’s a physical inspection where you’re just verifying that everything is working and that the codings that you put into the product are resistant to corrosion from the salt fog. So in essence, that’s really what the salt fog test is for and you’re just looking for resistance of the codings to breaking down or corrosion of the materials. So that’s method 509 in a nutshell. Thanks a lot.
Learn More About MIL-STD 810 Testing Methods:
- MIL-STD 810 Method 500 Low Pressure (Altitude)
- MIL-STD 810 Method 501 High Temperature
- MIL-STD 810 Method 502 Low Temperature
- MIL-STD 810 Method 503 Temperature Shock
- MIL-STD 810 Method 504 Contamination by Fluids
- MIL-STD 810 Method 505 Solar Radiation (Sunshine)
- MIL-STD 810 Method 506 Rain (Wind/Blown Rain)
- MIL-STD 810 Method 508 Fungus
- MIL-STD 810 Method 509 Salt Fog
- MIL-STD 810 Method 510 Sand and Dust
- MIL-STD 810 Method 511 Explosive Atmosphere
- MIL-STD 810 Method 512 Leakage
- MIL-STD 810 Method 513 Acceleration
- MIL-STD 810 Method 514 Vibration
- MIL-STD 810 Method 515 Acoustic Noise
- MIL-STD 810 Method 516 Shock
- MIL-STD 810 Method 519 Gunfire Vibration
- MIL-STD 810 Method 520 Temp, Humidity, Vibration