HERNDON, VA — iNEMI published a white paper on creep corrosion testing.

“A Cost-Effective & Convenient Approach to Creep Corrosion Testing” details how the iNEMI Qualification Test Development for Creep Corrosion project created a qualification test to determine whether PCBAs are likely to develop creep corrosion.  

The flowers-of-sulfur (FoS) corrosion chamber developed by the project team allows the temperature, relative humidity, sulfur and chlorine content to be controlled within the chamber. The test reportedly has been successful in reproducing creep corrosion on PCBs from lots known to have suffered creep corrosion in the field.

“iNEMI began working on the creep corrosion problem in 2009,” says iNEMI CEO Marc Benowitz. “Our initial efforts were very successful on improving our understanding of the factors affecting creep corrosion on PCBs and PCBAs, such as surface finishes, soldering fluxes, design features and the environment. More recently, with the need to identify an efficient and effective creep corrosion test, the team has successfully developed this FoS test chamber, which also has the potential to be used as a general-purpose corrosion chamber for a range of studies. Now the industry has a very effective tool to leverage in our quest to reduce incidences of corrosion-related failures.”

The white paper highlights key findings from the project team’s testing, describes the FoS test chamber developed by the team, and discusses how the chamber is used. To download a copy, go to https://www.inemi.org/creep-corrosion-white-paper-2018.

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