Critical Pitting Temperature (CPT) as per ASTM G150

This Application Note is based on the ASTM standard G150, developed to test the resistance of stainless steel, and other
alloys related to stainless steel, on pitting formation at elevated temperature. This is achieved by determining the potential-independent critical pitting temperature (CPT), defined as the lowest temperature at which pitting evolution occurs. The CPT experiment consists of applying a potential to the specimen while the cell temperature is raised and recording the current.