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Mixed flowing gas (MFG) testing is an accelerated environmental corrosion aging test that provides contact with harsh chemical pollutants commonly found in the atmosphere. The test specifically evaluates the corrosion of electrical components due to exposure to atmospheric gasses and contaminants.

Why undertake mixed flowing gas testing?

Mixed flowing gas testing allows manufacturers to test for the build-up of corrosion that leads to the reduced performance of electrical components, providing an accelerated environment to determine a product’s life span as well as identify potential failure points. These results allow manufacturers to reduce premature wear and liability. 

MFG testing is frequently used in conjunction with procedures which evaluate contact or connector electrical performance, such as measurement of electrical contact resistance before and after MFG exposure. 

For example, this method can establish if faults such as: pore corrosion, edge effects, tendency for edge creep, plating coverage, plating integrity, and “sheltering” effect exist within the contact area.

Testing plays a key role in product development, quality control, and evaluating the risk of the premature corrosion of parts across the automotive, aerospace, consumer products and medical device industries. Taking the automotive industry as an example, products which might require MFG testing include exterior products such as tail light assemblies and engine bay products such as steering pumps and vehicle control modules.

What does MFG testing involve? 

MFG testing simulates the real-world corrosion from environmental exposure conditions in a highly controlled environmental chamber. Temperature (°C), relative humidity (%RH), and concentration of gaseous pollutants and other essential variables, such as airflow and volume exchange rate, are carefully defined, monitored, and controlled in the chamber to evaluate how a product will perform under various conditions. 

With distinct gaseous pollutants dominating in different field environments, °Ä²Ê¿ª½±½á¹û’s team of experts can simulate virtually any environment at its Seattle-based mixed flow gas testing facilities, controlling not only the multiple-gas atmospheres at the parts per billion (ppb) level but also the temperature and humidity for the desired time limit.

Gases commonly used in the test are chlorine (Cl2), hydrogen sulfi