A PCT (Pressure Cooker Test) chamber is a device used to test the resistance of materials, such as coatings or finishes, to water or steam under pressure. The chamber creates a high-pressure, high-temperature environment that simulates the conditions that materials may encounter in real-world applications, such as in the automotive or aerospace industries. During testing, samples of the material being evaluated are placed in the chamber, which is then pressurized and heated to a predetermined temperature. The samples are exposed to the water or steam for a specified amount of time, and their performance is then evaluated based on a range of factors, such as color change, blistering, or adhesion failure. PCT chambers are commonly used to test the corrosion resistance of coatings on metal substrates, as well as the performance of sealants and adhesives. They are also used in the development and testing of electronic components, as exposure to moisture can cause failure in electronic devices.